06Ideal Hose Clamps130004202021 CLAMPS & HOSE PRODUCTS • Eliminates over-inhibited cooling systems • Reduces cost • Minimizes waste NEED RELEASE ® Extended Service Coolant Filter P/N Min Dia. Max Dia. IDL62040 51 7/32” 5/8” IDL62060 51 1/4 25/32 IDL5706 051 7/16 25/32 IDL5708 051 1/2 29/32 IDL5710 051 9/16 1-1/16 IDL5712 051 11/16 1-1/4 IDL5716 051 13/16 1-1/2 IDL5720 051 13/16 1-3/4 IDL5724 051 1-1/16 2 IDL5728 051 1-5/16 2-1/4 P/N Min Dia. Max Dia. IDL6506E 51 9/16” 13/16” IDL6508E 51 11/16 15/16 IDL6510E 51 13/16 1-1/16 IDL6512E 51 15/16 1-1/4 IDL6516E 51 13/16 1-1/2 IDL6520E 51 13/16 1-3/4 IDL6524E 51 1-1/16 2 IDL6528E 51 1-5/16 2-1/4 IDL6532E 51 1-9/16 2-1/2 IDL6536E 51 1-13/16 2-3//4 IDL6540E 51 2-1/16 3 P/N Min Dia. Max Dia. IDL47010 51 13/16” 1-1/16” IDL47012 51 15/16 1-1/4 IDL47016 51 13/16 1-1/2 IDL47020 51 13/16 1-3/4 IDL47024 51 1-1/16 2 IDL45200 51 1-1/4 2-1/8 IDL45250 51 1-3/4 2-5/8 IDL45300 51 2-1/4 3-1/8 IDL45350 51 2-3/4 3-5/8 General Purpose Lined Clamps Constant Torque P/N Min Dia. Max Dia. IDL5732 051 1-9/16 2-1/2 IDL5736 051 1-13/16 2-3/4 IDL5740 051 2-1/16 3 IDL5744 051 2-5/16 3-1/4 IDL5748 051 2-9/16 3-1/2 IDL5752 051 2-13/16 3-3/4 IDL5756 051 3-1/16 4 IDL5764 051 3-9/16 4-1/2 IDL5772 051 1-7/8 5 IDL5796 051 3-5/8 6-1/2 UNIVERSAL 3-WAY TEST STRIPS P/N NA TS200 • Designed for all heavy duty coolant types, including extended life coolant • Effectively tests freeze point, contamination & chemical protection and SCA (nitrate) concentrations CATALOG NUMBER 06 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ INSULONE ® HEATER HOSE Designed for heater hose applications with resistance to high underhood temperatures. Temperature Range: -40°F to 257°F (-40°C to 125°C) P/N ID (in.) DY 80314 5/8 DY 80316 3/4 DY 80319 1 Silicone heater hose is used for coolant transfer applications and higher temperature service. Temperature Range: -65°F to 350°F SAE Specifications: 20R3, Class A P/N ID (in.) DY 80251GL 5/8 DY 80252GL 3/4 DY 80254GL 1 GOLD LABEL ® SILICONE HEATER HOSE 50 FT. ROLLS HEATER HOSE (sold by the foot) STANDARD HEATER HOSE Designed for heater hose applications where resistance to antifreeze coolants and underhood temperatures is required. Temperature Range: -40°F to 257°F (-40°C to 125°C) SAE Specifications: Similar to SAE 20R3 P/N ID (in.) DY 80259 3/8 DY 80270 1/2 DY 80271 5/8 DY 80273 3/4 BLUE HEATER HOSE WITH XTREME HEAT TECHNOLOGY Designed for heater hose applications that are exposed to higher underhood temperatures and require a higher heat resistance. Temperature Range: -40°F to 300°F (-40°C to 149°C) SAE Specifications: SAE 20R3 Class D3 HT EC Branding: Continental Blue Xtreme ID, SAE J20R3-HT-D3-EC, Made in U.S.A. P/N ID (in.) GY 65028 3/8 GY 65029 1/2 GY 65031 5/8 GY 65033 3/4 GY 65035 1 GY 65037 1-1/4 HOSE BARB FITTINGS BELTS Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

06Dayco Belt Changeover Program130009132021 CATALOG NUMBER 06 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ Orders Exceeding $1,000 Changeover / new stocking orders exceeding $1,000 qualify for FREE Laser Alignment Tool All changeover / new stocking orders receive wall board of your choice and Dayco Factfinder Gauge: Orders Exceeding $2,500 Changeover / new stocking orders exceeding $2,500 qualify for FREE Laser Alignment Tool and Dayco Shop Stool BELT CHANGEOVER PROGRAM Laser Alignment Tool Alignment tool easily identifies misalignment which is the #1 cause of beltnoise DY 93874 Dayco Factfinder Gauge Measures v-belts up to 100" and multi-ribbed belts up to 115" DY 93860 Wood Rack 10 boards per case, 8 hooks per board DY 93902 Metal Rack 10 racks per case, 55 fingers per rack DY 93900 Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

06Continental Hydraulics Placement Program130009132021 GET ONE OF THREE CRIMPER OPTIONS WITH THE PURCHASE OF A QUALIFYING CONSUMABLE HYDRAULICS PRODUCTS ORDER HYDRAULICS PLACEMENT PROGRAM FREE! Available on any hydraulics, A/C purchase - including hose, fittings or adapters. Contact your local sales representative for full product listing. CATALOG NUMBER 06 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ Remaining 50% of crimper price credited back to account after additional purchase requirement (below) is met in first 12 months WANT A FREE CRIMPER? HERE’S HOW: Place order for machine & hydraulic product. Must equal or exceed initial stock order amount (amounts below). First 50% of crimper price credited back to account when crimper ships GX PC125MRCD - SKIT Crimper w/ PC125-Die Storage Drawer and eight dies ($3,095 approx. cost) (Hydraulic Pump Sold Separately PC125-PPUMP) Crimper Capability – B2 (up to -20) and SG (up to -16 four wire) Initial stock order of $3,100 (First 50% of crimper price) Purchase additional $9,500 in Hose & Fittings within 12 months from initial stock order (Remaining 50% of crimper price) FREE CRIMPER FREE CRIMPER GX PC125RCD - SKIT Crimper w/ PC125-Die Storage Drawer and eight dies ($4,675 approx. cost) Crimper Capability – B2 (up to -20) and SG (up to -16 four wire) Initial stock order of $3,700 (First 50% of crimper price) Purchase additional $12,000 in Hose & Fittings within 12 months from initial stock order (Remaining 50% of crimper price) GX PC150 - SKIT Crimper w/ PC150-Die Storage Shelf and nine dies ($6,515 approx. cost) 2HP ∙ 220V 2 Phase Crimper Capability – B2 (up to -24) and SG (up to -16 four and six wire) With double angle dies, the capability increases to the following: SG (up to -24 four wire), SG (up to -20 six wire), S6 (-24 six wire) FREE CRIMPER Initial stock order of $4,800 (First 50% of crimper price) Purchase additional $18,500 in Hose & Fittings within 12 months from initial stock order (Remaining 50% of crimper price) Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

04Stemco Zip Torq130003232021 an EnPro Industries company Making the Roadways Safer ® THE NEW STANDARD IN AXLE FASTENERS Zip-Torq ® is the latest STEMCO innovation designed to make the roadways safer. With its robust single piece design, Zip-Torq takes the guess work out of bearing adjustment. Simplified & Fully Unitized Design Single piece design allows installation without special tooling. No clips, keepers, snap rings, or screws to install. Prevents Back Off Integrated locking mechanism prevents back off. Secure Adjustment, Easy Removal Cannot rotate nut by hand after wheel-end adjustment is complete. After locking mechanism disengages you can remove by hand. Consistent Endplay 2-1-1 adjustment provides consistent endplay measurement between .001” – .002” to meet TMC recommendations (.001” – .005”). Highly Compatible Zip-Torq is compatible with most automated installation equipment, so there’s no need to purchase new equipment. Extend Your Warranty Zip-Torq is offered with STEMCO PPS+ programs, so you can still package your wheel end products to get the best warranty in the industry. Install With Confidence STEMCO offers installation videos and manuals online – available in the STEMCO app and on the website. CATALOG NUMBER 04 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Start All Jump Packs130003232021 CATALOG NUMBER 03 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ SPECIFICATIONS Featuring Protect∙All ™ Safety Protection: Reverse polarity, low voltage protection, short circuit, overheat protection, over discharge protection Engine Jump-starts engines up to 16L diesel Battery Type High-output premium lithium ion Capacity 236.8 Watt-hours (236,800mWh) Amps 10,000 Amps (<200 ms) Lifetime Performance Up to 5000 starts Storage Temperature 40° F to 75° F; 4° C to 24° C Unit Dimensions: 10.93”(L) x 4.33”(W) x 10.78”(H) Unit Weight: 11.1 lbs. (5.04 kg) With case: 17 lbs. (7.71 kg) Product improvement is a continuing goal. Design and specifications are subject to change without notice or obligation. Instantly Jump Start Your Class 8 Commercial Vehicles P/N GA JP-12-10000T Delivering maximum START-ABILITY with more battery capacity and initial starting power! Built to last, the 10,000A, 1332005S joules, 12V Start-All Jump-Pack ® starts the toughest Class 8 engines on demand. The Start-All Jump-Pack ® is equipped with proprietary technology, which provides an instantaneous energy transfer to the battery the moment the cables are properly connected, which maximizes jump-starter performance. The Start-All Jump-Pack ® provides reliable power to get you back on the road, quickly and safely. Easily jump start a dead semi-truck, charge phones, digital cameras, tablets, laptops, and portable gaming devices with multiple power ports! FEATURES • • Instantly starts Class 8/Class CE gasoline and diesel engines for trucks, semis, buses, construction and agriculture equipment • • Power ports include: (2) DC auxiliary power ports (2) 2.1A USB ports (1) 12V output port • • Large metal clamp with 1/0 gauge jumper cables • • Solid-state technology control provides longer durability and eliminates wear points • • 500 lumen LED flashlight with SOS and strobe emergency functions Includes jump starter with jumper cables plus 18V 100-240 VAC wall charger, safety strap, 3-in-1 mobile adapter, and carrying case. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Diagnosing Starter Cranking Problems Tech Tip130006272016 MIDWESTWHEEL.COM IOWA MISSOURI DES MOINES 1436 E. Ovid Ave. office 515.265.1491 fax 515.265.4120 parts fax 800.314.4329 parts 800.888.0248 CEDAR RAPIDS 200 50th Ave. S.W. main 319.365.4453 fax 319.365.6327 parts fax 877.706.6085 parts 800.332.5435 DAVENPORT 8502 Northwest Blvd. main 563.322.2671 fax 563.322.5940 parts 800.553.1886 SIOUX CITY 1819 4th St. main 712.252.7969 fax 712.252.6149 parts 800.943.3534 CLEAR LAKE 840 Hwy. 18 W. main 641.357.7101 fax 641.357.8190 parts fax 800.548.9674 parts 800.397.5630 KANSAS CITY 5801 E. Front St. main 816.471.1552 fax 816.471.0813 parts 800.821.7402 TRUCK PARTS SUPER STORE TM While cranking problems can be frustrating, identifying and correcting the root cause does not have to be. The first step is to identify the symptoms. In a cranking system, you can divide your symptoms into one of three possible troubleshooting categories: • • Slow Crank: The starter will crank, however, the engine RPM is slow to start the vehicle. • • Click No-Crank: The solenoid clicks but the starter doesn’t crank. • • No-Click No-Crank: The solenoid doesn’t click and the starter doesn’t crank. Once you’ve identified which problem you’re dealing with, then you can start to remedy it. For all issues, the initial troubleshooting is the same: you start with the batteries. STEP 1 - Begin at the batteries: Charge the batteries and perform battery load test on the battery bank. If the load test fails, then individually test each battery and replace any faulty ones. STEP 2 - Perform a voltage drop test: Once batteries pass muster, then perform a voltage drop test on the starter main cables. The starter voltage drop should be less than .5V drop total on cranking circuit. This is an important step and is often the cause of a slow cranking complaint. Yet, voltage drop also is a leading cause of click or no- click complaints because almost every vehicle manufacturer uses the heavy positive post, located on the starter solenoid, as a place to pick up the current used to supply the control circuit. STEP 3 - Identify the specific issue: Until now, the diagnostic path has remained the same regardless of the complaint. Now is where you address the specific issue. • • Slow Cranking: For the starter to be cranking, the control circuit would have to be working. So, if battery and cable checks are within specification and the vehicle still cranks slowly, then it’s a slow cranking problem and it’s time to replace the starter. • • Click No-Crank: Check the control circuit. If the starter does not contain an Integrated Magnetic Switch, or IMS, then a voltage drop test will need to be performed on the vehicle control circuit. If the starter does have an IMS switch function, then the technician will have to verify that the vehicle’s control circuit is providing voltage to the starter IMS. • • No-Click No-Crank: When this occurs, power is not being sent to the solenoid, making it very unlikely that the issue is related to the starter motor. Diagnosing Starter Cranking Problems May 24, 2016 (03Diagnosing Starter Cranking Problems Tech Tip) TECH Tips CATALOG NUMBER 03 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Delco Remy Measuring Current Draw of a Bus Tech Tip1300100 MEASURING CURRENT DRAW OF A BUS TECH Tips CATALOG NUMBER 03 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ Oftentimes, school buses are outfitted with air conditioning units, wheelchair lifts and many other accessories after they are sold to the school district. Eventually, these buses start experiencing battery issues because the originally installed alternator doesn’t provide enough output to handle the new electrical demands. If the alternator is not upgraded, this will result in constant discharging of the batteries, premature alternator failure, and starting issues due to low voltage. Checking Sufficiency of Alternator Output Measuring the current draw for the bus is the best way to ensure the alternator has sufficient output for all of the vehicle’s electrical demands. This will help you determine if you have the correct alternator for your application. 1. Fully charge the batteries before beginning. Partially charged batteries will result in inaccurate readings. 2. Attach a clamp-on ammeter around negative battery cables. 3. With the ignition key on and engine off, turn on all accessories, including the heater, defroster blower fan, lights, wipers, radio, video monitor system, stop flashers and warning lights. 4. With the clamp still in place, take and record a reading. Then turn off all the accessories and leave the ammeter in place. 5. Record the amperage draw of the special needs lift if the bus has one. With the key on and engine off, place a load on the lift and raise it. Take a reading and record it. 6. Measure the amperage for all accessories that automatically turn on when the engine is started. Record a reading with the engine on, and at high RPM with the accessories off. 7. Calculate the recommended alternator amperage rating by adding all the readings together and then multiplying that total by 1.2. As a rule of thumb, the total vehicle amperage demands should be 20 to 30 percent under your alternator’s rated output. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Delco Remy Training and Starter Motor Mounting TechTip1300 CATALOG NUMBER 03 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ CONNECT Online Technician Training Program Our overview course gives you the knowledge required to perform safe, consistent and efficient troubleshooting for 12 volt starting and charging systems. The course was developed by one of our industry-leading experts in electrical systems, and is comprised of four individual lessons: ■ Electrical System Review (20 minutes) ■ Troubleshooting Process and Your Tools (15 minutes) ■ Solving the Real Charging System Problem (25 minutes) ■ Solving the Real Starting System Problem (35 minutes) This in-depth course is a must for any technician working with starting and charging systems. We believe it’s such an important industry tool that we’ve made it available free of charge. It provides tips and techniques critical to troubleshooting the electrical system in a heavy duty vehicle. Because the course is online, you can take it at work or from home—wherever you have Internet access. Plus, it can be completed at a pace that works for you. It automatically saves your progress—even if you’re in the middle of a course—so you can come back to it at any point. It is ideal for technicians as well as techs-in-training. Participants who score a 70% or higher will receive a certificate indicating they achieved mastery level. O ur heavy duty truck training is sought by fleets from all over the country. Now we’ve made it even easier to access it via our online training program. ONLINE TRAINING Interactive features to engage users Work at your own pace Printable certificate of completion To register for the online training, visit www.delcoremy.com/Spec-it-Right/Technician-Training. Tests and questions to assess understanding Audio/ no audio option for individual preference CONNECT Online Technician Training Program Our overview course gives you the knowledge required to perform safe, consistent and efficient troubleshooting for 12 volt starting and charging systems. The course was developed by one of our industry-leading experts in electrical systems, and is comprised of four individual lessons: ■ Electrical System Review (20 minutes) ■ Troubleshooting Process and Your Tools (15 minutes) ■ Solving the Real Charging System Problem (25 i utes) ■ Solving the Real Starting System Problem (35 minutes) This in-depth course is a must for any technician worki g with starting and charging systems. We believe it’s such an important industry tool that we’ve made it available free of charge. It provides tips and techniques critical to troubleshooting the electrical system in a heavy duty vehicle. Because the course is online, you can take it at work or from home—wherever you have Internet access. Plus, it can be completed at a pace that works for you. It automatically saves your progress—even if you’re in the middle of a course—so you can come back to it at any point. It is ideal for technicians as well as t chs-in-tr i ing. Participants who score a 70% or higher will receive a certificate indicating they achieved mastery level. O ur heavy duty truck training is sought by fleets from all over the country. Now we’ve made it even easier to access it via our online training program. ONLINE TRAINING Interactive features to engage users Work at your own pace Printable certificate of completion To register for the online training, visit www.delcoremy.com/Spec-it-Right/Technician-Training. Tests and questions to assess understanding Audio/ no audio option for individual preference Online Tech ician Training Program Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Delco Remy Diagnostic Procedures Manual Tech Tip1300042420 TECH Tips CATA LOG NUMBER 03 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ MIDWESTWHEEL.COM IOWA MISSOURI DES MOINES 1436 E. Ovid Ave. office 515.265.1491 fax 515.265.4120 parts fax 800.314.4329 parts 800.888.0248 CEDAR RAPIDS 200 50th Ave. S.W. main 319.365.4453 fax 319.365.6327 parts fax 877.706.6085 parts 800.332.5435 DAVENPORT 8502 Northwest Blvd. main 563.322.2671 fax 563.322.5940 parts 800.553.1886 SIOUX CITY 1819 4th St. main 712.252.7969 fax 712.252.6149 parts 800.943.3534 CLEAR LAKE 840 Hwy. 18 W. main 641.357.7101 fax 641.357.8190 parts fax 800.548.9674 parts 800.397.5630 KANSAS CITY 5801 E. Front St. main 816.471.1552 fax 816.471.0813 parts 800.821.7402 TRUCK PARTS SUPER STORE TM For Starters and Alternators SCAN HERE FOR MANUAL: Diagnosis C harts Overcharge Sy mptoms Undercharge Sy mptoms Milled Pinion Sy mptoms T esting Testing Freedom B atteries Testing Conventional B atteries Test Pr ocedure Battery Cable Test with Single-Battery L ocation Battery Cable Test with Dual-Battery L ocations Starter Solenoid Circuit Test Magnetic Switch Circuit Test Starter Replacement Determination Alternator Wiring Test Alternator Replacement Determination DIAGNOSTIC PROCEDURES MANUAL April 22, 2020 (03Delco Remy Diagnostic Procedures Manual Tech Tip) Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03DelcoRemy Diagnostic Manual130004222020 Diagnostic Procedures Manual For Starters and Alternators Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Table of Contents I ) Introduction and Description 1–1. Introduction 1 1–7. Description 1 1–12. Electrical Fundamentals 2 II ) Diagnosis Charts 2–1. Overcharge Symptoms 8 2–2. Undercharge Symptoms 9 2–3. Milled Pinion Symptoms 10 III ) Testing 3–1. Testing Freedom Batteries 11 3–4. Testing Conventional Batteries 11 3–5. Test Procedure 12 3–7. Battery Cable Test with Single-Battery Location 12 3–10. Battery Cable Test with Dual-Battery Locations 14 3–13. Starter Solenoid Circuit Test 14 3–18. Magnetic Switch Circuit Test 16 3–21. Starter Replacement Determination 17 3–26. Alternator Wiring Test 18 3–29. Alternator Replacement Determination 19 3–33. Completion of All Tests 20 IV ) Summary V ) Appendix 5–1. Smart IMS or SIMS Diagnostic Steps 22 5-2. Overcrank Protection (OCP) Circuit Check 23 5-3. Multi-Battery Charging with Series and Parallel Chargers 23 5-4. Group Charging on Current-Limiting or Series Chargers 24 5-5. Group Charging on Voltage-Limiting or Parallel Chargers 24 5-6. Heavy Duty Diagnostics Procedures Data 25 Section Page Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 1 1-1. INTRODUCTION 1-2. PURPOSE. This manual provides diagnostic procedures that can be used for troubleshooting a heavy duty electrical system, including the starting and charging systems. Some procedures also may be used for preventative maintenance checks. These procedures are applicable to systems using heavy duty starters such as: Delco Remy 28MT™, 29MT TM , 31MT™, 35MT TM , 37MT TM , 38MT TM , 39MT TM , 41MT TM , 42MT TM , 50MT TM or a similar starter with adequate battery power for the engine/starter application used. 1-3. DEFINITION OF DIAGNOSIS. Diagnosis is the three-part process that begins when a problem is perceived and ends when the equipment is confirmed as serviceable. Three questions must be answered to assure completion: 1. What are the symptoms? This is what has been observed (seen, heard, felt or smelled), indicating a problem. 2. What caused the symptoms? Diagnostic procedures are used to identify the root cause of the problem. 3. How do we fix it? Usually this involves the adjustment, repair or replacement of some part or parts. 1-4. This manual defines the procedures to determine the cause of the symptoms. Actual adjustment, repair and replacement procedures are provided in unit-specific service bulletins and manuals. 1-5. For educational purposes, study of this entire manual is recommended. For diagnostic purposes, the flow charts in Section II will reference appropriate procedures for specific symptoms. 1-6. EQUIPMENT REQUIRED. To perform the tests specified in this manual, the following equipment is required: 1. A variable carbon pile load tester with more than 500 amps capacity with ammeter (and voltmeter). 2. A separate DC voltmeter, digital preferred, capable of reading 0.01 volt increments. 3. An inductive (clamp-on) ammeter for safe and accurate current measurements. 4. A hand held or bench top type tester. 1-7. DESCRIPTION 1-8. SYSTEM. The heavy duty electrical system is comprised of the starting and charging systems. These systems are, in turn, comprised of batteries, the starter, the alternator, and the interconnecting wiring and electrical and mechanical switches. For maximum operating efficiency, all parts of the system must be functioning properly. S E C T I O N 1 Introduction and Description FIGURE 1-1. Heavy Duty Electrical System 1. Battery 2. Starter 3. Alternator 4. Magnetic Switch 5. Push Button Switch 6. Key Switch Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 2 1-9. BATTERIES. Batteries are perishable devices that wear out at some point in time. With use, they deteriorate and eventually become incapable of performing their important job. In addition, new batteries may become discharged for various reasons. Neither worn out nor discharged batteries can supply the power necessary for cranking. Thus, the battery check becomes the starting point for diagnosing electrical system problems. 1-10. SUBCIRCUITS. Because of vibration, corrosion, temperature changes or damage, the performance of wiring, connections and secondary components as well as the function of the starter and alternator can deteriorate. This, in turn, can cause malfunctions within the starting and charging systems. For the purpose of testing, wiring and components are divided into four circuits that must be tested. These are: 1. Cranking Circuit. This consists of the large cables that carry the high starter current. Excessive loss here causes slow cranking speeds, especially in cold weather. Inability to start from slow cranking can lead to starter damage if the starter is cranked over 30 seconds. Deeply discharged or worn-out batteries also can cause the same problem. 2. Solenoid Circuit. This consists of the wiring from the battery, through a push button or magnetic switch, to the S terminal of the starter solenoid, and back to the battery. Excessive loss here can cause the solenoid to shift in and out (chatter), resulting in a no-start condition. This can cause a damaged contact disc and terminals of the starter solenoid. Deeply discharged batteries also can cause this problem. 3. Magnetic Switch Circuit or IMS (when the magnetic switch is used). This consists of the wiring from the battery, through a key switch and/or start button, to the coil of the magnetic switch, and back to the battery. Excessive loss here can cause a “no start” complaint. 4. Charging Circuit. This consists of the wiring between the alternator and the battery and back to the alternator. Excessive loss here can cause the batteries to not charge properly. As noted above, discharged batteries will cause other problems. 1-11. SEQUENCE OF PROCEDURES. It is important that these procedures be followed in the exact sequence specified. Batteries, wiring and connections should be checked and corrected to the specifications given. If cranking problems still occur, then connecting cables should be checked before replacing the starter with a known good unit. Similarly, in the charging circuit, the batteries, wiring and connections should be thoroughly checked and corrected to the specifications given. Only then should the alternator be checked and replaced if necessary. 1-12. ELECTRICAL FUNDAMENTALS 1-13. TERMS AND DEFINITIONS. The following are electrical terms and definitions used in this manual: 1. Voltage. Voltage is the electrical pressure or force that causes current or electrons to flow through a conductor. The voltage also can be described as the difference in electrical pressure between two points in a circuit. This electrical force or pressure is measured in volts. 2. Current. Electrical current is the flow or movement of electrons in a conductor. This movement can be compared to the flow of water through a pipe. Without pressure (voltage), the current will not flow. Electrical flow is measured in amperes, most often abbreviated as amps. 3. Resistance. Resistance is the opposition to current flow. For a given electrical pressure (voltage), resistance decreases current flow. This can be detected by voltage loss or drops in the electrical circuit. Electrical resistance is measured in ohms. 4. Magnetic Field.When electrical current flows through a conductor, a magnetic field is produced around the conductor. By measuring the strength of this magnetic field, it is possible to determine the amount of the current flow or amperage. This principle is the basis for the function of the clamp-on or induction type ammeter. 1-14. MEASURING VOLTAGE WITH THE VOLTMETER. The voltmeter is used to measure electrical pressure or voltage. The unit of measure is the volt. Voltmeters are always connected across (in parallel with) a part of the electrical circuit (See Figures 1-6 and 1-7). The voltmeter measures the difference in electrical potential or pressure between the points where the voltmeter is attached. 1-15. VOLTMETER SELECTION. Voltmeters for the purposes described in this manual are DC instruments with a range as follows: 1. Low scale: 0-3 volts 2. 12-volt vehicles: 0-16volts 3. 24-volt vehicles: 0-32volts MAGNETIC FIELD CURRENT DP-1005 Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 3 NOTE The use of digital voltmeters is highly recommended for the following reasons: • Digital voltmeters are generally more accurate than analog (needle movement) instruments. • Digital readings need no interpretation; everyone sees the same number. • Digital instruments are generally auto ranging; they automatically select the proper range for the value of the reading. • Reversing polarity with a digital instrument will simply result in a negative reading (minus sign) whereas with an analog voltmeter, reversing polarity could damage the meter. • If analog meters are not read directly facing the meter, inaccuracies may result. 1-16. VOLTMETER USE. Figures 1-6 through 1-8 illustrate the proper use of the voltmeter and the types of readings that can be expected. 1. Figure 1-1 shows the voltmeter being used with no current flow or with the starter not operating. FIGURE 1-1. Voltmeter Readings with No Current Flow FIGURE 1-2. Voltmeter Readings with Current Flow NOTE When the voltmeter is connected parallel to a cable (meter leads and cable ends start and end at the same point), the meter will measure the voltage potential at both ends of the cable. Without current flowing, the values always will be the same and the voltmeter will read zero. 2. Figure 1-2 shows the voltmeter being used with current flow (starter pulling 500 amps). NOTE The V1 reading (See Figure 1-2) means that with 500 amps flowing through the positive cable, there is a 1.0 volt drop in that cable. There must be current flow in order to produce a voltage drop. The V2 reading (See Figure 1-2) of 0.3 volt means that with 500 amps flowing through the negative cable, there is a 0.3 volt drop in the negative cable. 3. Figure 1-3 illustrates the digital voltmeter reading in a DC system with both correct and incorrect polarity. Whenever the minus sign is displayed, the meter leads must be reversed to obtain the correct polarity. 0 V DP-1006 0 V O V V4 12.5V 0 V V3 0V 12.5 V 12.5V V2 12.5 V V1 0 V 0 V 12.5 V 12.5 V DP-1007 0.3 V 0.3 V V2 8.5 V V1 1.0 V 7.5 V 8.5 V V2 7.2 V 0.3 V V1 0 V 8.5 V 7.5 V Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 4 DIGITAL VOLTMETER CONNECTED CORRECTLY IN RELATIONSHIP TO POLARITY DIGITAL VOLTMETER CONNECTED INCORRECTLY IN RELATIONSHIP TO POLARITY (VALUE CORRECT BUT MINUS SIGN WILL SHOW TO ALERT OPERATOR THAT LEADS ARE REVERSED) DP-1008 12.5 V1 -12.5 V1 FIGURE 1-3. Correct and Incorrect Polarity Readings 1-17. MEASURING CURRENT FLOWWITH THE AMMETER. The ammeter is used to measure current flow. The unit of measure is the ampere or amp. Unless the induction pickup (clamp-on) ammeter is used, the circuit must be opened and the ammeter connected in series in order to take measurements. 1-18. AMMETER SELECTION. With but a few exceptions (See Figure 1-10), it is desirable to make ammeter readings without opening up the circuit and thus disturbing a circuit defect and preventing it from being discovered. Therefore, the use of a clamp-on induction-type ammeter is recommended for most of the measurements described in this manual. This type is easy to use, cannot be damaged by misconnection, and will not damage the vehicle wiring. A clamp-on ammeter operates by measuring the magnetic flux produced by current flow through a conductor and translating that into amperes, which are displayed on the meter readout. 1-19. AMMETER USE. Figures 1-4 through 1-6 illustrate the use of various types of ammeters. 1. Figure 1-4 illustrates the use of an in-line digital ammeter. Note that the circuit must be disconnected in order to use this type of meter. The type of unit shown is an internal shunt and generally used for loads of 10 amps or less. Care must be taken to not measure current greater than the meter rating. This type of ammeter is not recommended for most of the measurements described in this manual. However, if this is the only type available, be sure to follow the meter manufacturer’s instructions for connection and use. FIGURE 1-4. In-Line Digital Ammeter 2. Figure 1-5 shows an in-line digital ammeter used to measure an unknown current draw. An example of this might be the result of a parasitic load. On the 10 amp scale, the current would be too low to be measurable. However, with the meter on the 300 mA scale, the current draw in milliamps can be read. FIGURE 1-5. In-Line Ammeter 3. Figure 1-6 shows a clamp-on ammeter, the most common type of current measurement described in this manual. Zero out the meter before using and make sure the jaws are completely closed during use. Place the meter jaws around the cable, with the arrow points in the direction of current flow, to measure all the current. 10A 10 AMPS OR LESS LOAD DP-1009 UNKNOWN CURRENT DRAW DP-1010 Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 5 CLAMP-ON TYPE AMMETER DP-1011 FIGURE 1-6. Clamp-On Type Ammeter 1-20. MEASURING RESISTANCE WITH THE OHMMETER. The ohmmeter is used to measure electrical resistance. The unit of measure is the ohm. The ohmmeter is connected across the unit or portion of the circuit for which the resistance is to be measured. The ohmmeter has its own power source, usually a small battery, which causes current to flow through the circuit to be measured. Since the meter power source (battery) voltage is known, the current is inversely proportional to the resistance of the circuit. The meter automatically computes and reads out the resistance: E (voltage) divided by I (current) equals R (resistance). 1-21. OHMMETER SELECTION. As with voltmeters and ammeters, both analog (needle) and digital ohmmeters are available. Digital ohmmeters are preferred for the same reasons as the others. Additionally, most digital ohmmeters have a diode scale which can be used to test diodes and transistors. 1-22. OHMMETER USE. Figures 1-7 through 1-9 illustrate some typical uses of the ohmmeter. CAUTION Typical heavy duty electrical system voltage (12 or 24-volts) could produce a current flow through the ohmmeter that could damage the meter. Never connect an ohmmeter to a circuit that is under voltage. Always disconnect the battery ground cable before using the ohmmeter. 1-23. As shown in Figures 1-7 and 1-8, the ohmmeter also is useful as a continuity meter. An infinite ohmmeter reading (See Figure 1-7) indicates an open circuit (no continuity). A very low (approaching zero) reading (See Figure 1-8) indicates continuity. Figure 1-9 illustrates some digital ohmmeter applications. FIGURE 1-7. Analog Ohmmeter Showing Open Circuit NOTE Most digital meters have a diode scale ( ) which must be used to check diodes or transistors rather than the ohm scale. 1-24. APPLYING AN ELECTRICAL LOAD WITH A CARBON PILE. (See Figure 1-10) The carbon pile is a variable resistor designed to carry high current. A carbon pile, along with a voltmeter and ammeter, is normally an integral part of a modern battery tester. In addition to load testing batteries, carbon piles are used to test starter and alternator circuits. FIGURE 1-8. Analog Ohmmeter Showing Continuity TOUCHING GROUND OHMMETER OPEN OHMETER DP-1012 TRUCK FRAME DP-1013 Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 6 EXAMPLES DP-1014 .450 2.3 0.00 COIL DIODE DIGITAL DIGITAL OL FIGURE 1-9. Digital Ohmmeter CAUTION On 24-volt systems, use only a carbon pile specifically designed for 24-volt use. A 12-volt carbon pile could be damaged if used in a 24-volt circuit. 1-25. THE BASIC HEAVY-DUTY ELECTRICAL SYSTEM. Today’s basic heavy duty electrical system (See Figure 1-1) consists of batteries (usually three or four, but up to eight connected), a starter, an alternator, a magnetic switch, an ignition switch, a push-button switch, and the required wiring. The batteries provide the high current required by the starter. The magnetic switch controls the battery current to the starter solenoid. The ignition and push-button switches activate the magnetic switch, which in turn energizes the starter. If all functions work properly, the engine will crank. 1-26. The mechanical energy of the running engine provides the power for the alternator. The alternator creates the electrical energy needed to recharge the batteries and power the vehicle’s electrical accessories and loads. DP-1015 FIGURE 1-10. Carbon Pile 1-27 . How well the electrical system components are matched will determine in a large part how effectively and efficiently the system will operate. Another important factor in system design is that system wiring must be adequate to carry the current required by each circuit. 1-28. HEAVY DUTY SYSTEM BATTERIES. The battery, or batteries, in the heavy duty electrical system are devices for storing energy. They convert chemical energy into the electrical energy needed to operate the starter. With the engine running, the alternator supplies electrical energy to the batteries, which they convert into chemical energy and store for later use. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 7 There are three types of lead acid batteries used in commercial vehicle applications today: the maintenance-free flooded electrolyte battery, the AGM battery, and the Thin Plate Pure Lead (TPPL) AGM battery. Unlike maintenance-free, flooded, lead acid batteries that have liquid electrolyte, an AGM battery contains a glass mat separator made of fiberglass that is placed between each plate to absorb the electrolyte. Fleets should prevent batteries from becoming deeply discharged—dropping to less than 10 volts due to extended storage with vehicle support loads. Also, trying to start trucks with a low state of charge or weak capacity batteries can cause high amperages and low voltages. This can overheat the starter motor and damage battery cables. A voltmeter on the battery terminals will indicate the battery’s State of Charge (SOC). State of Charge Flooded Battery AGM Battery TPPL AGM Battery 100% 12.70+ 12.80+ 12.84+ 75% 12.40 12.60 12.50 50% 12.20 12.30 12.20 25% 12.00 12.00 11.90 0% 11.80 11.80 11.50 Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 8 PRELIMINARY DIAGNOSIS FLOW CHART 2-1. OVERCHARGE SYMPTOMS • High voltmeter readings • Battery smells bad • Battery spews acid or smells • Bright or burned out lights INTERNAL VOLTMETER REPLACE ALTERNATOR RUN ENGINE APPROX 2000RPM CHECK VOLTS ATALTERNATOR EXTERNAL REGULATOR USE REG. SVC. BULLETIN TO ISOLATE DEFECT VERIFY COMPLAINT REPAIR VOLTMETER RETEST WITH COOL, CHARGED BATTERIES REPLACE DEFECTIVE BATTERY COMPLETE CHECK DASH VOLTMETER CHECK BATTERY TEMPERATURE TEST BATTERIES (PAGE 3-1) COMPLETE 119 ˚ F OR LESS 120 ˚ F OR MORE DEFECTIVE LESS THAN 15.5 V DEFECTIVE OK OK MORE THAN 15.5 V S E C T I O N I I Diagnosis Flow Charts Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 9 PRELIMINARY DIAGNOSIS FLOW CHART 2-2. UNDERCHARGE SYMPTOMS • Slow or no cranking • Low voltmeter reading • Dim lights/slow turn signal flashers START VEHICLE CHECK ALTERNATOR VOLTAGE & OUTPUT (PAGE 19) TIGHTEN BELT TO MANUFACTURER TENSION SPECS CHECK STARTER SOLENOID CIRCUIT (PAGE 14) REPAIR WIRING CIRCUIT - VERIFY REPAIR CHECK DRIVE BELT VERIFY COMPLAINT TEST BATTERIES (PAGE 11) CHECK CRANKING CIRCUIT (PAGE 12) REPAIR AND VERIFY REPAIR SEE STARTER REPLACEMENT DETERMINATION (PAGE 17) CHECK PULLEYS FOR LOCKED BEARINGS REPAIR DEFECTIVE COMPONENT REPLACE BELT CHARGE BATTERIES CRANK ENGINE CHECK ALTERNATOR VOLTAGE & OUTPUT (PAGE 19) SLOW OK OK OK LOCKED DEFECTIVE OK OK OK DEFECTIVE OK OK BUT DISCHARGED MISSING LOOSE Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 10 PRELIMINARY DIAGNOSIS FLOW CHART 2-3. MILLED PINION SYMPTOMS • Starter spins / no-crank • Click / no-crank (may be intermittent) VERIFY COMPLAINT VISUALLY CHECK RING GEAR CHECK STARTER PER APPROPRIATE SERVICE BULLETIN REINSTALL STARTER AND PERFORM CIRCUIT CHECKS (SEE PAGE 3-4) REMOVE STARTER – VISUALLY CHECK PINION CHECK AND REPAIR SOLENOID CIRCUIT REPAIR VERIFIED REPAIR OR REPLACE STARTER (DO NOT INSTALL) REPLACE RING GEAR AND CHECK FLANGE TO FLYWHEEL DIM REPLACE STARTER AND VERIFY REPAIR CONNECT VOLTMETER FROM SOLENOID “S” TERMINAL TO GROUND – ENGAGE START SWITCH DEFECTIVE OK MILLED TEETH OK OK OK SYMPTOMS CONTINUE MILLED PINION MORE THAN 6.0 V NO VOLTS Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 11 3-1. TESTING FLOODED LEAD ACID MAINTENANCE FREE BATTERIES WITH A HYDROMETER EYE CAUTION When handling batteries, wear face or eye protection and provide good ventilation. Have a water supply available, and keep away from fire, flame or sparks. 3-2. TEST PROCEDURE. Disconnect NOTE If battery has threaded terminals, use terminal adapters or verify you are testing on the lead pads not the threaded terminals. Testing using the studs can create a false bad battery reading. NOTE If you are using an hand held electronic tester, then follow the instructions provide with the tester. Inspect 1. Each battery visually for damage. 2. Battery hydrometer eye. • If battery has no hydrometer eye, proceed to step 3. • Eye shows green, proceed to step 3. • Eye shows dark, recharge battery, then proceed to step 3. • Eye shows yellow, replace battery. 3. Apply 300 amp load to battery for 15 seconds and turn off load. Wait one minute. 4. If battery has no hydrometer eye, measure terminal voltage: Test a. If 12.4 volts or more, continue test. b. If less than 12.4 volts, recharge battery, and repeat steps 3 and 4. Test 5. All batteries passing previous inspection or test as follows: a. Apply test load of 1\2 CCA rating at 0˚F in amps. b. After 15 seconds with load on, measure and record battery terminal voltage. c. Turn load off. d. Estimate battery temperature and check recorded voltage against following table. Temp. 0F 70 50 30 15 0 Min. Volts 9.6 9.4 9.1 8.8 8.5 e. If recorded voltage does not meet or exceed that in table, replace battery. Otherwise, battery is okay. 3-3. TEST COMPLETION. Clean 1. Cable ends and battery terminals with wire brush. Tighten 1. Battery hold-downs to specifications. NOTE Leave battery cables disconnected and proceed with wiring tests. ST1201 ADAPTER PRIMARY BATTERY CONNECTION AREA STUD TERMINAL DP-1019 FIGURE 3-1. Testing Batteries 3-4. TESTING BATTERIES CAUTION When handling batteries, wear face or eye protection and provide good ventilation. Have a water supply available, and keep away from fire, flame or sparks. S E C T I O N I I I Diagnostic Testing Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 12 3-5. TEST PROCEDURE Disconnect NOTE If battery has threaded terminals, use terminal adapters or verify you are testing on the lead pads not the threaded terminals. Testing using the studs can create a false bad battery reading. NOTE If you are using an hand held electronic tester, then follow the instructions provide with the tester. Inspect 1. Each battery visually for damage. 2. Electrolyte level. • If fluid is above top of plates in all cells, proceed to step 3. • If fluid is not above top of all plates, add water as required and charge battery for 15 minutes at 15-25 amps to mix electrolyte. Then proceed to step 3. 3. Electrolyte specific gravity with hydrometer at 80˚ F. Readings for all cells should not be less than 1.230. The difference between high and low reading should not exceed 0.050. • If battery meets above requirements, proceed to next test. • If readings show a difference of more than 0.050, replace the battery. • If readings show less than 0.050 difference but one or more cells read less than 1.230, recharge the battery. Remove 1. All battery caps. Test 2. Apply 300 amp load to battery for 15 seconds and turn off load. 3. If blue haze is seen in any cell, replace battery. Otherwise, proceed with next test. Test 1. All batteries passing previous inspections or tests as follows: a. Measure and record electrolyte temperature and replace vent caps. b. Apply test load of 1\2 CCA rating at 0˚F in amps. c. After 15 seconds with load on, measure and record battery terminal voltage. d. Turn load off. e. Check recorded voltage against following table for electrolyte temperature. Temp. 0F 70 60 50 40 30 20 10 0 Min. Volts 9.6 9.5 9.4 9.3 9.1 8.9 8.7 8.5 f. If recorded voltage does not meet or exceed that in table, replace battery. Otherwise, battery is okay. 3-6. TEST COMPLETION. Clean 1. Cable ends and battery terminals with wire brush. Tighten 1. Battery hold-downs to specifications. NOTE Leave battery cables disconnected and proceed with wiring tests. FIGURE 3-2. Testing Batteries 3-7. BATTERY CABLE TEST WITH SINGLE BATTERY LOCATION (SEE FIGURE 3-3) CAUTION If the vehicle has a combination 12/24-volt system using a series- parallel switch or a T/R alternator, do not use this procedure. Contact BorgWarner Technical Support at 800-372-0222 or email drts@borgwarner.com for information on such systems. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 13 Slow or sluggish cranking may be caused by high resistance in the battery cables or connections, especially in cold weather. After all batteries test well and the terminals are clean, check the battery cables. This involves placing an adjustable carbon pile load on the batteries at the starter and then measuring the voltage drop in each cable. The voltage drop in the positive cable plus the voltage drop in the negative cable equals the total drop or the difference between the battery voltage and the starter voltage. 3-8. TEST PROCEDURE. NOTE For a 24-volt system, use a 24-volt carbon pile. As an alternative, connect only one 12-volt battery to the system (disconnect all other batteries). Test at 12-volts but use the amperage specified for a 24-volt system. Immediately upon completion of tests, reconnect batteries in the approved manner for a 24-volt system. Connect CAUTION Starter solenoid BAT terminal is at battery voltage when batteries are connected. 1. Positive carbon pile lead to starter solenoid BAT terminal. 2. Negative carbon pile lead to starter ground terminal. 3. Battery cables (see NOTICE above) if not already connected. NOTE At starter, make voltmeter connection to terminal—not to carbon pile clamp. 4. Low scale digital voltmeter from starter solenoid BAT terminal to battery positive. Test 1. Turn on carbon pile and adjust load to 500 amps (250 amps for 24-volt system). 2. Read and record positive cable voltage drop (V4), then turn off carbon pile. Connect NOTE At starter, make voltmeter connection to terminal—not to carbon pile clamp. 1. Low scale digital voltmeter from starter ground terminal to battery negative. Test 1. Turn on carbon pile and adjust load to 500 amps (250 amps for 24-volt system). 2. Read and record negative cable voltage drop, (V5) then turn off carbon pile. 3. Add positive cable loss (V4) and negative cable loss (V5) to get total cable loss (V3). This loss (V3) shall not exceed: • 12-volt system with 37MT, 40MT, 41MT or 42MT starter — 0.500 volt maximum voltage loss • 12-volt system with 50MT starter — 0.400 volt maximum loss • 24-volt system with 37MT, 40MT, 41MT, 42 MT, or 50 MT starter — 1.000 volt 4. Replace cables or repair circuits with excessive voltage drop. 3-9. TEST COMPLETION. If temporary 12-volt test connections were made for 24-volt systems, reconnect batteries to vehicle specifications for 24-volt operation before starting vehicle. However, if the tests following are to be performed, keep the temporary 12-volt hook-up. FIGURE 3-3. Battery Cable Test – Typical 12-Volt System Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 14 3-10. BATTERY CABLE TEST WITH DUAL-BATTERY LOCATIONS (SEE FIGURE 3-4) This test applies if the vehicle has more than one battery location and the batteries are connected to the starter by separate cables. Essentially, this is the same as the previous test with a single battery location (paragraphs 3-7 through 3-9) except as follows: 3-11. TEST PROCEDURE (See Figure 3-4). NOTE If the system usually operates on 24-volts, connect one battery at each location to the starting motor, making a temporary 12- volt system. 1. Disconnect batteries from first set. 2. Test second set cables as described in paragraph 3-8 except apply 250 amp load at starter (125 amp for 24-volt system). 3. Use same voltage drop or loss limits as specified in paragraph 3-8. 4. Reconnect first set of batteries and disconnect second set. 5. Repeat steps 2 and 3 for first set of cables. 6. Replace cables or repair circuits with excessive voltage drop. 3-12. TEST COMPLETION. If temporary 12-volt test connections were made for 24-volt system, reconnect batteries to vehicle specifications for 24-volt operation before starting vehicle. However, if the tests following are to be performed, keep the temporary 12-volt hook-up. CARBON PILE POSITIVE VOLTAGE LOSS NEGATIVE VOLTAGE LOSS FIRST SET SECOND SET FIGURE 3-4. Battery Cable Test - Typical Dual Box 12-Volt System 3-13. STARTER SOLENOID CIRCUIT TEST The starter shifting in and out, or not pulling in, is often caused by high resistance in the starter solenoid circuit. When the solenoid circuit has excessive voltage loss, the starter pinion may not engage the flywheel. If it does engage, it may drop out too soon when battery voltage lowers. The solenoid circuit usually consists of a magnetic switch with leads to and from the starter solenoid. Some vehicles use only a push-button switch to control the starter solenoid and this same test applies. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 15 NOTE For starters with an integral magnetic switch, use the test procedures specific to those starters. NOTE When testing 24-volt systems, use the same temporary 12-volt connection as for the Battery Cable Test, paragraph 3-7. 3-14. SOLENOID CIRCUIT VOLTAGE LOSS TEST (See Figure 3-5). Disconnect 1. Lead to S terminal on starter solenoid. Connect 1. Carbon pile to switch wire lead and to starter ground terminal (a small clamp or jumper wire may be helpful). 2. Positive lead of digital voltmeter set on low scale to solenoid BAT terminal. 3. Negative lead of voltmeter to switch wire lead to which carbon pile is connected. Meter will show battery voltage. NOTE In the following step, if the magnetic switch does not close on a 12-volt vehicle, perform Magnetic Switch Circuit Test, paragraph 3-18, then return to this point in the Starter Solenoid Circuit Test. NOTE In the following step on a 24-volt vehicle, if the temporary 12-volt system will not close the magnetic switch, bypass it with a heavy jumper connected between the two large studs on the magnetic switch. Electrically this does the same thing as pushing the button and closing the switch. With no button to release, the jumper must be disconnected after each voltage reading. Test 1. Have assistant push starter button with key on. Listen for sound of magnetic switch closing. Voltmeter reading should be zero. 2. Turn on and adjust carbon pile to 100 amp load (60 amp if 24- volt system). 3. Read and record voltage (V6) onvoltmeter. 4. Voltage loss shall not exceed: 12-volt system - 1.0 volt 24-volt system - 2.0 volt 5. If circuit voltage loss is less than maximum, solenoid circuit is okay, turn off and disconnect carbon pile and proceed to Magnetic Switch Circuit Test, paragraph 3-18. If voltage loss exceeds maximum, loss is excessive. This may be caused by loose terminals, corrosion, too small a wire, switch located too far from starter, or worn out magnetic switch. Perform Wiring Test, paragraph 3-15, and Magnetic Switch Contactor Test, paragraph 3-16, to isolate the problem. VOLTAGE (6) CARBON PILE FIGURE 3-5. Starter Solenoid Circuit Test 3-15. WIRING TEST (See Figure 3-6). With carbon pile connected as instructed in previous Starter Solenoid Circuit Test, proceed as follows: Connect 1. Plus lead of digital voltmeter set on low scale to solenoid BAT terminal. 2. Minus lead of voltmeter to a large terminal on magnetic switch. If voltage shows, reconnect lead to other large terminal on magnetic switch. NOTE In the following step, on a 24-volt vehicle, if the temporary 12-volt system will not close the magnetic switch, bypass it with a heavy jumper connected between the two large studs on the magnetic switch. Electrically this does the same thing as pushing the button and closing the switch. With no button to release, the jumper must be disconnected after each voltage reading. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 16 Test 1. Push starter button with key on. 2. Turn on and adjust carbon pile to 100 amp load (60 amp if 24-volt system). 3. Read and record voltage (V9) onvoltmeter. Connect 1. Positive lead of digital voltmeter set on low scale to switch wire lead to which carbon pile is connected. 2. Negative lead of voltmeter to other large terminal on magnetic switch. Test 1. Push starter button with key on. 2. Turn on and adjust carbon pile to 100 amp load (60 amp if 24-volt system). 3. Read and record voltage (V10) on voltmeter. 4. Add voltage loss (V10) to voltage loss (V9), previously recorded, to get total wire voltage loss. 5. Total wire voltage loss shall not exceed: 12-volt system - 0.8 volt 24-volt system - 1.8 volt 6. Replace and repair wiring and connections if voltage loss is excessive. NOTE Perform the following test only if the magnetic switch closed in preceding tests. 3-16. MAGNETIC SWITCH CONTACTOR TEST (See Figure 3-6). With carbon pile connected as instructed in previous Starter Solenoid Circuit Test, proceed as follows: Connect 1. Digital voltmeter set on low scale across large terminals of magnetic switch. Battery voltage will show immediately. Test 1. Push starter button with key on. Voltage will read zero. 2. Turn on and adjust carbon pile to 100 amp load (60 amp if 24-volt system). 3. Read and record voltage (V11) across magnetic switch on voltmeter, then release starter button. 4. Magnetic switch contactor voltage loss (V11) shall not exceed 0.2 volts for 12- or 24-volt system. 5. Replace magnetic switch if contactor voltage loss is excessive. DP-1024 CARBON PILE SECOND WIRE LOSS (10) CONTACTOR LOSS (11) FIRST WIRE LOSS (9) FIGURE 3-6. Solenoid Circuit Wiring and Contactor Test 3-17. TEST COMPLETION. Turn carbon pile off. Remove carbon pile and voltmeter from circuit. Leave solenoid S wire disconnected and temporarily taped for insulation at the terminal. 3-18. MAGNETIC SWITCH CIRCUIT TEST This test must be performed using full voltage of the system. If a 24-volt system was temporarily connected to a 12-volt system for a previous test, proceed to the Alternator Wiring Test, paragraph 3-26. Then, return to this test after the batteries have been reconnected to the 24-volt system. Note that the lead to the S terminal on the starter solenoid remains disconnected from previous tests (See Figure 3-7). Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 17 3-19. TEST PROCEDURE. NOTE Magnetic switch that does not close or drops out too soon can be caused by high resistance or open circuit in the control circuit. NOTE Leave the S lead disconnected to prevent engine from cranking during these tests. Connect 1. Digital voltmeter set on battery voltage scale to two small terminals on magnetic switch. If magnetic switch has only one small terminal, use switch bracket for other connection. Test 1. With key on, push start button. Listen for click that signifies magnetic switch closing. Note and record voltmeter reading V(13). 2. If magnetic switch closed (click detected or voltage at both large switch terminals) and voltage V(13) is within 1.0 volt (2.0 volts for 24-volt system) of battery voltage V(12), this circuit is okay. 3. If magnetic switch does not close and voltage V(13) is within 1.0 volt (2.0 volt for 24-volt system) of battery voltage V(12), replace magnetic switch and retest. 4. If voltage V(13) is more than 1.0 volt (2.0 volt for 24-volt system) below battery voltage, move the voltmeter lead on the magnetic switch ground to frame or motor ground terminal. With key on, push start button and read voltage V(14). If voltage V(14) is within 1.0 volt (2.0 volts for 24-volt system) of battery voltage, repair magnetic switch ground lead or connections. If not, replace voltmeter ground lead at magnetic switch ground terminal. 5. Repeat step 4, moving voltmeter plus lead to the following locations and measuring the specified voltages with the key on and the push-button depressed. If any voltage is not within 1.0 volt (2.0 volts for 24-volt system) of battery voltage, repair or replace the wire or component specified and retest: V(15)-wire between push-button and magnetic switch V(16) push-button V(17) wire between push-button and key switch V(18) key switch V(19) wire between key switch and solenoid BAT terminal 3-20. TEST COMPLETION. Remove voltmeter from vehicle. If all tests have been completed satisfactorily, reconnect lead to S terminal on starter solenoid so that engine can be started. PUSH BUTTON MAGNETIC SWITCH VOLTAGE (13) V(15) V(16) IGNITION BATTERY CABLE VOLTAGE (12) V(19) V(14) V(17) V(18) DP-1025 FIGURE 3-7. Magnetic Switch Circuit Test 3-21. STARTER REPLACEMENT DETERMINATION Up to this point, the batteries and starter wiring have been checked. The following additional checks should be made before considering starter replacement, and finally, the criteria for starter replacement, if necessary. 3-22. COLD WEATHER CRANKING. Starter circuits with a magnetic switch also can fail to hold during cold weather starting and low voltage, even though the switches and circuits tested okay at higher temperatures. This condition will sound as though the starter is failing to stay engaged with the engine. It is caused by the cold weather low voltage of the system releasing the electrical connection of the magnetic switch. To test for this condition, proceed as follows: Test CAUTION Large terminal studs on magnetic switch are at battery voltage. Engine should crank when jumper is connected. 1. With key switch on, press start button and have assistant clamp heavy battery jumper cable between two large studs on magnetic switch. Engine should crank. 2. Immediately remove jumper to stop engine cranking. 3. If engine starts with jumper in place, replace magnetic switch. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 18 4. If vehicle now starts properly, make sure starter mounting bolts are tight and proceed to Alternator Wiring Test. 3-23. AVAILABLE CRANKING VOLTAGE . If batteries, switches and wiring have been checked and starter still cranks slowly, check for available voltage at the starter while cranking. Proceed as follows: Test 1. Have assistant press push-button with key switch on while measuring voltage across solenoid BAT terminal and starter ground terminal. 2. If voltage is 9.0 volts (18 volts for 24-volt system) or less while cranking, check battery interconnecting cables as specified in next step. 3. Measure voltage across each battery while cranking. Touch voltmeter leads to terminals of every battery. If difference between any two battery readings in same box is more than 0.5 volt, or if any cable or connection feels warm to the touch, check or replace interconnecting cable(s) as required. 3-24. RING GEAR AND PINION CHECK. One final check before replacing the starter is to inspect the pinion and ring gear. Inspect 1. Pinion and ring gear visually while assistant bars engine over. Be sure to check entire ring gear. 2. If pinion is damaged, replace starter. If ring gear is damaged, replace ring gear and note that there is a likelihood the pinion also may be damaged. 3-25. STARTER REPLACEMENT. After making all tests specified, if the vehicle does not crank properly, the problem is with the starter or engine. Replace the starter and re-check to see if engine cranks properly. If not, then look for a mechanical problem with the engine. 3-26. ALTERNATOR WIRING TEST This procedure is the first step in checking out the charging system: output of the alternator, batteries and accessory loads with a minimum of voltage loss. Any loss slows the rate of charge to the batteries and could cause the batteries to be partially discharged. Discharged batteries can result in starter damage. Low output voltage can cause improper performance of other vehicle electrical components. 3-27. TEST PROCEDURE (See Figure 3-8). Instead of using the alternator output, this test uses the same current but draws it from the batteries. Using a carbon pile load, current flows in reverse through the circuit with the engine off. Proceed as follows: NOTE 24-volt systems must be connected to a temporary 12-volt configuration as described for Battery Cable Test, paragraph 3-8. NOTE Before proceeding with this test, make sure that the batteries have been tested and that the terminal has been cleaned and tightened. CAUTION Alternator output terminal is at battery voltage. Engine must be off for this test. Connect 1. Carbon pile to alternator output terminal and to ground. NOTE Jumper wires may be used to extend voltmeter leads if necessary. 2. Digital voltmeter set on low scale from alternator output terminal to positive battery terminal. Test 1. Turn on and adjust carbon pile to alternator-rated amperage output. 2. Read voltmeter and record voltage (V24), which is positive circuit voltage loss. Immediately turn off carbon pile. Connect 1. Digital voltmeter set on low scale from alternator ground to negative battery terminal. Test 1. Turn on and adjust carbon pile to alternator rated amperage output. 2. Read voltmeter and record voltage (V25), which is negative circuit voltage loss. Immediately turn off carbon pile. 3. Add positive circuit loss (V24) and negative circuit loss (V25) to get total system loss (V23). This loss (V23) shall not exceed: • 12-volt system - 0.500 volt maximum voltage loss • 24-volt system - 1.000 volt maximum voltage loss 4. Replace cables or repair circuits with excessive voltage loss. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 19 3-28. TEST COMPLETION. Remove carbon pile and voltmeter. For 12-volt systems, proceed with Alternator Replacement Determination. For 24-volt systems, proceed as follows: 1. Reconnect temporary 12-volt system back to 24-volt system. 2. If Magnetic Switch Circuit Test was delayed, conduct at this time. 3. After completing Magnetic Switch Circuit Test, be sure to reconnect lead to S starter solenoid terminal. Then proceed with Alternator Replacement Determination. NEGATIVE CIRCUIT LOSS (25) CARBON PILE POSITIVE CIRCUIT LOSS (24) DP-1026 FIGURE3-8. AlternatorWiring Test - Typical 12-Volt System 3-29. ALTERNATOR REPLACEMENT DETERMINATION If the alternator wiring circuits are okay, conduct the following tests to determine if the alternator must be replaced. NOTE Make sure that alternator mounting hardware is secure and that belts are OK before testing alternator. NOTE Batteries must be satisfactorily load tested and near full charge with more than 12.4 volts — no load voltage. 3-30. ALTERNATOR VOLTAGE OUTPUT TEST. Conduct this test at shop temperature (See Figure 3-9). Connect 1. Digital voltmeter from positive alternator terminal to alternator ground. Test 1. Start engine and make sure all vehicle electrical loads are turned off. Fast idle engine until voltage stabilizes (does not increase) for two minutes. 2. Check that alternator output voltage does not exceed 15.5 volts (31 volts for 24-volt system). Remove voltmeter. NEGATIVE CIRCUIT LOSS (25) CARBON PILE POSITIVE CIRCUIT LOSS (24) DP-1026 FIGURE3-8. AlternatorWiring Test - Typical 12-Volt System 3-31. ALTERNATOR AMPERAGE OUTPUT TEST. Conduct this test at shop temperature (See Figure3-10). Connect 1. Carbon pile across the vehicle batteries hooked in parallel. 2. Induction ammeter clamped around alternator output wire. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 20 NOTE If more than one wire is connected to the alternator output terminal, clamp around ALL these wires. Test NOTE In the following test, alternator should be turning at approximate rated speed. Most heavy duty alternators are rated at 5000 rpm. Check manufacturer’s specifications for specific alternator being tested. 1. If off, start engine and make sure all vehicle electrical loads are turned off. Speed up engine. Turn on and adjust carbon pile until ammeter reads its highest value. Record this reading. 2. Turn off carbon pile and engine. 3. If reading is zero (no output), magnetize the rotor with the alternator hooked up normally. Momentarily connect a jumper lead from the battery positive (+) to the alternator relay (R) or indicator (I) terminal. This procedure applies to both negative and positive ground systems and will restore the normal residual magnetism. 4. Repeat steps 1 and 2. If output is still zero, replace the alternator. 3-32. ALTERNATOR REPLACEMENT. Replace alternator if either of the following conditions exist: 1. Alternator output voltage exceeds 15.5 volts (paragraph 3-30). If alternator has separate regulator, use the appropriate regulator service bulletin to isolate the defect. 2. Alternator output current is not within 10% of alternator rated output (stamped on alternator case). Examples: 30-SI - 105 amps, 26-SI - 85 amps, and 21-SI - 100 amps. 3-33. COMPLETION OF ALL TESTS Make sure that all test instruments have been removed from the vehicle and that the vehicle wiring, if altered, has been returned to the operational state. DP-1028 CARBON PILE FIGURE 3-10. Amperage Output Test Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 21 As the diagnostic procedures in this manual become part of your routine preventative maintenance program, here are two key tips to remember: 1. Don’t jump to early conclusions. 2. Perform the diagnostic procedures in the exact order listed. These diagnostic procedures, if followed correctly, will enable you to diagnose issues and maintain heavy duty electrical systems so that they will perform well. However, the manual may not cover all the variables that you may encounter. If you need assistance, contact BorgWarner Technical Support at 800.372.0222 or email drts@borgwarner.com . S E C T I O N I V Summary Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 22 S E C T I O N V Appendix 5-1. Smart IMS or SIMS Diagnostic Steps The Smart Starter with integrated magnetic switch (IMS) relay and integrated over crank protection (IOCP) is designed to protect the vehicle system from multiple system-related failures. The Smart Starter will accomplish this by not allowing the starter system to function in detrimental conditions to the starter or electrical system. To troubleshoot, you must first verify that the vehicle is equipped with the Smart Starter SIMS relay and integrated OCP. The SIMS relay is programmed to protect the vehicle from these failure modes: • Starter engagement monitor/auto start retry – click no crank or prolong power • Running engine lockout – engagement into running engine • System low/high voltage lockout – over crank and pinion chatter • Time limited crank – over crank • Auto disengage at engine start – extended overrun • Integrated OCP thermal cutout switch – heat damage from extended crank VISUAL DIFFERENCES STANDARD IMS RELAY SIMS RELAY When troubleshooting a vehicle system equipped with SIMS/IOCP, voltage and temperature are critical during diagnosis: ENGAGEMENT MONITOR/AUTO RETRY – 12-VOLT SYSTEM: The system will attempt to engage the pinion three times in less than one second. After three failed attempts, cycle the engine ignition off/on before making another crank attempt. LOW VOLTAGE LOCKOUT – 12-VOLT SYSTEM: Start attempts are not allowed if open circuit voltage is less than 12 volts (equal to 25% of the battery’s state of charge). Check system voltage and charge batteries if this condition is present before removing starter. HIGH VOLTAGE LOCKOUT – 12-VOLT SYSTEM: If starter sees system voltage of greater than 14 volts, the SIMS/ IOCP will lock out, preventing the start attempt. This protects against high voltage jumpstarts (starter will be locked out if attempting jumpstarts above 14 volts). INTEGRATED OVER CRANK PROTECTION – 12-VOLT SYSTEM: If the starter is continuously cranked and reaches an internal temperature greater than 150˚C, the OCP switch will open and abort the start attempt. This allows the starter to cool down and the OCP to close so that the crank cycle can be performed. Allow the starter to cool before removing from the vehicle. Note: When troubleshooting the starting system, verify that there is suitable voltage at the “S” terminal before removing the starter. The SIMS unit may be protecting the starting system if voltages are either high or low, or if over-cranking occurs and the OCP switch opens due to high temperatures. CAUTION LABEL Caution label to be placed on can of SIMS unit CAUTION – SMART STARTER! SMART IMSWITH IOCP EQUIPPED (INTEGRATED OVER CRANK) PREVENTS CRANKING UNDER LOW/HIGH VOLTAGE AND HIGH TEMPERATURE CONDITIONS Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 23 5-2. OVERCRANK PROTECTION (OCP) CIRCUIT CHECK To check the thermostat in the OCP circuit for continuity, detach wiring harness connector and connect an ohmmeter to the two thermostat terminals on the starter. The ohmmeter should read zero. If not, thermostat is open circuit and the starter should be replaced prior to proceeding with other tests in this booklet. DO NOT check thermostat when hot since it is supposed to be open circuit above certain temperatures. 5-3. MULTI-BATTERY CHARGING WITH SERIES AND PARALLEL CHARGERS These procedures assist in providing charged batteries for future service. However, “boost” charging or “fast” charging is not covered. Below are basic guidelines for charging groups of batteries and supplements information contained in the Delco Service Bulletins, 1B-115 and 1B-116. The two types of battery chargers in use today for charging a group of batteries are: • Current-limiting (often called Constant – Current or Series Chargers) • Voltage-limiting (often called Constant – Voltage or Parallel Chargers) With current-limiting, the batteries are connected so that each battery receives the same amount of charging current. (See Fig. 1 for typical hook-up.) With voltage-limiting, the batteries are connected so that the charging current is divided and each battery receives only the charging current it can accept at the charger’s voltage. (See Fig. 2 for typical hook-up.) Because of these differences, the charging procedures also differ. No matter which type of charger is used, differences exist among batteries: age, capacity, size, state of charge, and type. These differences mean that time and attention must be given to batteries during the group-charging process. CHARGER A V V V V TEST VOLTMETER DP-1030 A CHARGER AMMETER FIGURE 1. A V V TEST VOLTMETER DP-1031 A CHARGER AMMETER FIGURE 2. Connect to same ground point as standard circuit (may be through relay or fuel pressure switch) Thermostat Leads (2) Motor Thermostat Connections DP-1029 DELCO REMY STARTERSWITH OVERCRANK PROTECTION Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 24 To prevent undercharging or overcharging and battery damage on the charging rack, the following procedures are recommended: NOTE The following recommendations are for batteries with electrolyte and plates at room temperatures of 55˚ to 85˚F (13˚ to 30˚C). Extremely cold batteries accept very little charging current and will not conform to the suggested procedures. 5-4. GROUP CHARGING ON CURRENT-LIMITING OR SERIES CHARGERS 1. Visually inspect all batteries for cracked covers or cases; replace obviously damaged batteries. a. Filler-cap batteries: Check with hydrometer. If reading is 1.230 or more, test as outlined in Delco Service Bulletin 1B-115. If reading is below 1.230, proceed with charging procedure. If fluid level is low, add water to bring level sufficiently high for hydrometer readings, (but not to the split ring), then proceed with charging. After charging, add water just to split ring. b. Freedom batteries: Check built-in hydrometer; if clear or yellow, replace the battery. If hydrometer has a green dot, do not charge, but test as outlined in Delco Service Bulletin 1B- 116. If hydrometer is dark, proceed with charging procedure. 2. Connect batteries to charger as shown in Figure 1. Do not exceed the charger’s voltage capabilities by connecting too many batteries. Make sure all connections are clean and tight. Set charging rate within 5-10 ampere range and maintain this charging rate throughout the charging procedure. 3. After two or three hours of charging, check batteries as follows: a. Filler-cap batteries: Take hydrometer readings at hourly intervals. Correct readings to 80˚F (27˚C). Remove any battery from charge when there is no increase in specific gravity after three successive hourly readings. Any battery that becomes hot (125˚F, 52˚C) or violently gasses, should be removed from the charger for testing. Readjust control to maintain the same charging rate after the batteries are removed. b. Freedom batteries: Check for green dot indication. Shake or tilt batteries at hourly intervals to see if green dot will stay visible. Also check terminal voltage of each battery with test voltmeter connected, as shown in Figure 1. While on charge, if voltage across the battery is 16.0 volts or more, or if the green dot appears, remove battery from charger. Any battery that becomes hot (125˚F, 52˚C), as determined by touching and feeling the case, or any battery that violently gasses, should be removed from the charger for testing. Readjust control to maintain the same charging rate on remaining batteries as charged batteries are removed. 4. After charging, all batteries should be tested as described in the testing procedure in Delco Service Bulletins 1B-115 and 1B-116 to make sure batteries are usable. 5-5. GROUP CHARGING ON VOLTAGE-LIMITING OR PARALLEL CHARGERS 1. Visually inspect all batteries for cracked covers or cases; replace obviously damagedbatteries. a. Filler-cap batteries: Check with hydrometer; if reading is 1.230 or more, test as outlined in Delco Service Bulletin 1B-115. If reading is below 1.230, proceed with charging procedure. If fluid level is low, add water to bring level sufficiently high for hydrometer readings, but not to split ring, then proceed with charging. After charging, add water to split ring. b. Freedom batteries: Check built-in hydrometer; if clear or yellow, replace battery. If hydrometer has a green dot, do not charge, but test as outlined in Service Bulletin 1B-116. If hydrometer is dark, proceed with charging procedure. 2. Connect batteries and test voltmeter to charger as shown in Figure 2. Make sure that all connections are clean and tight. Set charging voltage setting to a setting that does not exceed 16.0 volts. The charger may not be able to reach this voltage initially, but as batteries become charged and accept less current, the voltage will rise. The ammeter of the charger is indicating the total current flow to the connected batteries. This current divides into the various batteries. It is not a measure of each battery’s current acceptance. Do not exceed the charger’s capabilities by connecting too many batteries. Follow the charger manufacturer’s directions. 3. After two or three hours, check batteries at hourly intervals as follows: a. Filler-cap batteries: Take hydrometer readings at hourly intervals. Correct readings to 80˚F (27˚C). Remove any battery from the charge when there is no increase in specific gravity after three successive hourly readings. Any battery that becomes hot (125˚F, 52˚C) or violently gasses should be removed from the charger and tested. In the event that a hot battery is removed, most of the charging current was going to that battery and it will be necessary to continue charging the remaining batteries since they received very little charging current. b. Freedom batteries: Check for green dot indication. Remove from charger when green dot stays visible. Any battery that becomes hot (125˚F, 52˚c), as determined by touching and feeling the case, or violently gasses, should be removed from the charger and tested. In the event that a hot battery is removed, most of the charging current was going to that battery and it will be necessary to continue charging the remaining batteries, since they received very little charging current. Readjust control to keep voltage below 16.0 volts, if necessary, as batteries are removed. 4. After charging, all batteries should be tested as described in the testing procedure in Delco Service Bulletins 1B-115 and 1B-116 to make sure batteries are usable. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 delcoremy.com Page 25 5-6. HEAVY DUTY DIAGNOSTIC PROCEDURES DATA Section 3-7 BATTERY CABLE TEST W/500 AMP LOAD (FROM FIGURE 3-3) Section 3-15 and 3-16 STARTER SOLENOID CIRCUIT TEST W/100 AMP LOAD (FROM FIGURE 3-6) Section 3-27 ALTERNATOR WIRING LOSS AMP LOAD = ALTERNATOR RATED OUTPUT (FROM FIGURE 3-8) (AMP LOAD AND MAXIMUM VOLTAGE LOSSES SHOWN ARE FOR 12-VOLT SYSTEMS.) Delco Remy is a registered trademark of General Motors Corporation licensed to BorgWarner PDS (Anderson) L.L.C. POSITIVE CABLE LOSS _______________________________ NEGATIVE CABLE LOSS _______________________________ NEGATIVE CABLE LOSS _______________________________ V4 V5 (MAX. 0.500 V) FIRST WIRE LOSS ______________________ SECOND WIRE LOSS ______________________ MAG SWITCH LOSS ______________________ TOTAL SOLENOID CIRCUIT LOSS ______________________ V4 V10 V11 (MAX. 1.00 V) POSITIVE CIRCUIT LOSS _______________________________ NEGATIVE CIRCUIT LOSS _______________________________ ALTERNATOR CIRCUIT LOSS _______________________________ V24 V25 (MAX. 0.500 V) + + + + + + = Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 03DelcoRemy Diagnostic Manual130004222020 Page 26 NOTES __________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ 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03Delco Oversizing and Alternator Tech Tip130003232021 TECH Tips CATALOG NUMBER 03 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ Fuel Savings If you choose an alternator that has approximately double the rated output of what your system requires, then you are essentially oversizing your alternator. For example, most on-highway vehicles have about 65 to 85 amps of electrical loads turned on when operating. While an alternator may be rated for a specific output, it runs most efficiently when it’s operating at roughly 35 to 50 percent of that rated output. A more efficient alternator always decreases your fuel consumption. Longer Alternator Life With an oversized alternator only using 35 to 50 percent of the alternator’s rated output, you are reducing the amount of strain on the alternator. This means the alternator is running much cooler and isn’t being tasked as much either. And this all results in increased bearing grease, rectifier diode, and stator insulation life. Benefits of Oversizing an Alternator Better Battery Life Another added benefit of oversizing the alternator is the positive impact it can have on your batteries. You’re able to reduce the depth of a battery’s discharge— also known as cycling. That’s because an oversized alternator produces more output at lower speeds, including idle. That increased output prevents the battery from having to help supply the load—and this keeps it at a more ideal state of charge. The battery cycles less, which translates into better battery life. With three to four batteries per vehicle, you can see how extending battery life can be a big benefit. When making the smart decision to oversize your alternator, keep in mind that the original alternator cables may need to be upgraded to realize the full value. When managing a fleet, the goal is always to get the most out of your equipment. We’ve got an innovative way for you to do just that: oversizing the alternator. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Delco Remy 31MT Commercial Vehicle Starter03232021 CATALOG NUMBER 03 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ FEATURES & BENEFITS Developed from the 29MT design – of which there are more than 1.25 million OE units installed – the 31MT provides virtually full coverage for the Class 6 & 7 commercial vehicle aftermarket. This model features positive shift engagement. In the case of tooth abutment, the armature rotation in full power clears the abutment to allow pinion engagement. The benefit is zero click-no-cranks (CNC). This is well suited for high start/stop vehicle applications. The 31MT is highly corrosion resistant due to improved brush holder plating and stainless steel springs. A number of design changes to the hardware, including the commutator, O-rings and bearings, as well as the lamination have resulted in the 31MT being one very robust starter. Engine Size 12V up to 9 Liters Rotation Clockwise Mounting 12V: SAE #1 Pinion Data 10 Tooth, 10-12 Pitch 10 Tooth, 8-10 Pitch 9 Tooth, Mod 3-metric Output 12V peak at 4.1kW Weight 8.4 kg / 18.5 lbs Diameter 90 mm / 3.5 inches Engagement System Positive shift engagement SPECIFICATIONS 31MT ™ Commercial Vehicle Starter COMPETITIVE COMPARISON 600 550 500 450 400 350 300 250 200 150 100 50 0 Engine Cranking Torque (Nm) 31MT 29MT Denso PA90 70 80 90 100 110 120 130 140 150 160 170 180 Engine RPM IDEAL APPLICATIONS Delivery vehicles Waste disposal vehicles Emergency vehicles School busses Tow & haulers Recreational vehicles Shuttle busses Generation sets & compressor units 10% more peak power than the competition Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Checking Voltage Drops Tech Tip130006272016 TECH Tips CHECKING VOLTAGE DROPS Is it really that important? Sometimes what is thought to be a battery, alternator or starter problem is actually charging system problems due to high or unwanted resistance. There's only one method of determining if there is an adequate delivery path for optimum starting, charging, battery performance and life. The electrical problems related to excessive voltage drops are more common than you may realize. Think of your starting and charging cables as a two-way street. The battery needs to deliver its available power to the starter through the cables and connections for cranking the engine. In turn, the alternator needs to replenish the battery and provide the power for the vehicle loads through the charging cables and connections. If the street is too narrow to carry the current, it shows up in measurable “voltage drop” or loss. This is often manifested in short battery life, frequent jump-starts or perceived alternator and starter problems. It’s not uncommon for an alternator or starter to be replaced because it’s believed to be faulty or run its normal life cycle... only to later discover that the root cause of the problem doesn’t reside with the alternator or starter. High or unwanted resistance is one contributing factor that leads to cranking and charging system problems. High resistance is often caused by one of these four main issues: • • Loose connections • • Corrosion in the cables and wiring • • Improperly sized wiring or cables • • Improperly crimped connectors While a technician may regularly do a visual inspection of cables and connections it doesn’t really show what is going on inside the cables or inside the connections. This is why the concept of voltage drop testing is the only sure method of determining if there is an adequate current delivery path for optimum starting, charging, battery performance and life. “A voltage drop test is a good ‘best practice’ during your scheduled preventative maintenance or before replacing the battery, starter or alternator,” explains Clint Stohler, Director, Technical Service and Training. “One volt drop generally equals a loss of 30 engine cranking rpms.” Scan with your smartphone for video instructions on how to properly test your battery, alternator and starter! Conducting a Voltage Drop Test Equipment needed: • • Voltmeter • • Carbon pile load tester A voltage drop test will assess voltage losses at the battery, the alternator and the starter. Part 1: Battery 1. With the voltmeter connected to battery, and key and engine off, record a "base" voltage reading. (Your battery should have a minimum of 12.4 volts.) If it is less than 12.4 volts, charge the battery and repeat the test. 2. If the voltage is greater than 12.6 volts (AGM batteries 12.8 volts), surface charge must be removed. 3. To remove surface charge, turn on the headlights and blower motor (high speed) for one minute. Then turn off the devices and wait two minutes for the voltage to stabilize. 4. Once you have a reading that is between 12.4 and 12.6 volts you will then start the engine and bring it to normal operating temperature. 5. With the engine at 1,500 to 2,000 rpm, turn on all electrical loads (lights, blower fan, A/C, etc.). The charging voltage should be at least 0.5 volt above base voltage reading. If not, excessive resistance could be present. Continued on back... CATALOG NUMBER 03 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Deka Golf Cart Batteries130003232021 CATALOG NUMBER 03 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ GOLF CART BATTERIES More Power on the Green. Less Maintenance In-Between. Key Features and Benefits of the Deka PROMASTER Series of Golf Cart Batteries. ▪ ▪ Heavy-Duty Deep Cycle Service High-density plates and reinforced grid design withstand continual deep cycling ▪ ▪ Power-Boost Technology Optimizes current paths and ionic power flow to maximize performance ▪ ▪ Electrical Short Prevention System Protects power-producing components from life- robbing electrical shorts ▪ ▪ Rugged vibration resistant construction Reinforced internal design withstands heavy-duty use ▪ ▪ Premium glass mats Protect battery’s ability to store energy (less recharging) ▪ ▪ Less watering, less maintenance design - Large reservoir and ultra-pure electrolyte optimizes water utilization - Special alloy and separator material reduces water consumption ▪ ▪ Outdoor-tough polypropylene case and cover Resist breakage to protect equipment and extend service life Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

03Battery Charging Tech Tips130011202019 TECH Tips CATALOG NUMBER 03 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ Made in the USA This is confidential information and is not to be duplicated or published without the permission of East Penn Manufacturing Co. EXTREME COLD VERY DEEPLY DISCHARGED 22 VOLTAGE STATE OF CHARGE FREEZING POINT ( F) 12.66 100% -90 12.40 75% -58 12.20 50% -31 12.00 25% -10 11.80 0% 10 VOLTAGE STATE OF CHARGE FREEZING POINT (°F) 12.66 100% -90 12.40 75% -58 12.20 50% -31 12.00 25% -10 11.80 0% 10 BATTERIES CAN FREEZE IN EXTREME COLD WHEN DISCHARGED CHARGING BEST PRACTICES: Did you know East Penn employes over 1,000 Iowans? ▪ ▪ Safety first!! ▪ ▪ Wear proper eye protection. ▪ ▪ Read charger manufacturer’s charging instructions ▪ ▪ Make sure charging area is well ventilated ▪ ▪ Never attempt to charge a frozen battery. ▪ ▪ Gel and AGM batteries require a voltage limited charger. ▪ ▪ Never overcharge batteries. ▪ ▪ Maximum charge rate and amperes should be no more than 1/3 of the battery’s reserve capacity minute rating ▪ ▪ If the terminal voltage exceeds 16 volts while charging, reduce the charge rate. ▪ ▪ If violent gassing of electrolyte occurs, or the battery case feels hot to the touch, reduce or halt charging. ▪ ▪ Clean terminals AE 9425 12 Volt, 20 Amp Charger/Analyzer/ Power Supply AGM CHARGER SEE MIDWEST WHEEL’S BATTERY CATALOG FOR A FULL LINE OF CHARGERS & ALL YOUR ELECTRICAL SYSTEM NEEDS! Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

02Winterizing Your Air System Air Dryers Tech Tip13000323202 TECH Tips CATALOG NUMBER 02 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ Winterizing Your Air System Air Dryers Basic steps needed for good preventative maintenance and will help get you through the cold winter months with fewer malfunctions. • • Desiccant cartridge life can be from 3 months to 3 years based on compressor oil passage and duty cycle. For best results, if your dryer design gives you direct access to the desiccant cartridge, replace it every autumn. With this design, it’s fast & easy to replace the cartridge to avoid “truck down” issues when it gets extremely cold. If you are using a design where you have to disassemble the dryer to replace the cartridge, the inspection of the wet tank will be your guide. When in doubt, always replace the cartridge. Remember the performance of downstream air system components is dependent on clean, dry air. Most fleets replace desiccant cartridges every year Desiccant Cartridge • • Check the air dryer heater; A) for proper voltage to the heater, B) that it is properly grounded, most commonly to the frame rail and C) that it is functioning properly. Air Dryer Heater • • If your vehicle uses an alcohol injector/evaporator, fill it up with approved air brake anti-freeze. Typically, these are not needed in today’s air systems using air dryers but they can be a good supplement to the air dryer in colder climates. Never add air brake anti-freeze directly into air lines. Alcohol Injector/Evaporator • • The purge area of the air dryer is susceptible to malfunction because of the contaminants that pass through it. If your truck has high air usage or if you replace desiccant cartridges often then autumn is also a good time to replace the purge valve. Purge Valve Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

02Meritor Air System Maintenance Tech Tip130012152017 TECH Tips CATALOG NUMBER 02 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ Even a perfectly maintained and adjusted foundation brake will not function properly if the air system is contaminated. Oil contamination can lead to premature failure of vehicle systems that rely on clean air for proper operation (including the air brake, engine emissions and drivetrain systems). Many of these advanced technology systems require coalescing dryers/cartridges which have been OEM standard on most vehicles since 2010. Maintaining a clean and dry air system is always important (as water in the system can result in costly repairs). As winter approaches and outside air temperatures drop, regular service intervals of the air system need to be continued. Air System Maintenance Replacement Requirements Component When to Replace* Why Cartridge Every two to three years for standard dessicant. Every one to two years for coalescing. Preventative maintenance. When compressor is replaced. Contaminated cartridge. Water in supply tank. Saturated or contaminated cartridge, high duty cycle (wrong application of air dryer). Bypass Valve (dryers with date codes earlier than 0894) Valve leaking, inlet to outlet. Cut O-ring, bad seat. Heater Assembly Water collecting in air dryer is freezing - electrical power to dryer is OK. Heater assembly not working (internal short or open circuit) Outlet Check Valve Air continues to flow from purge valve after purge cycle, but stops flowing when the compressor load cycle begins. Valve is stuck in the open position, or not functioning properly. No pressure build-up in system, everything else is OK. Valve is stuck in closed position. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

02ProVia Air Dryer Cartridges130003222021 CATALOG NUMBER 02 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ ProVia Air Dryer Cartridges P/N RZ PRO0102002 (Ref. R950011) Why ProVia? Until now, your choice of parts was often limited to either premium original parts or low quality substitutes. In response to this, WABCO developed our ProVia line of all-makes parts, which satisfies the need for affordable replacement parts that don’t compromise on quality or safety. About ProVia Air Dry Cartridges An air dryer cartridge is the first line of defense in protecting your vehicle’s air brake system, so it’s important to choose a part that prevents water intrusion. ProVia air dryer cartridges provide up to 15% better drying capacity compared to the low quality options in the market today*, protecting downstream components from corrosion and freezing. ProVia air dryer cartridges are: Built to fit a majority of air dryer applications Designed, engineered and tested by aftermarket specialists Proven to perform better than low quality alternatives Backed by a one year warranty WABCO is committed to helping you manage your vehicle’s total cost of ownership. With ProVia, you now have access to quality aftermarket parts that have the perfect blend of reliability, performance and value. Features Standard spin-on style cartridge for easy maintenance Quality cartridge desiccant provides up to 15% better drying performance than low quality competitors* Reliable performance up to 189 psi (13 bar) working pressure Benefits Spin-on style cartridge ensures fast installation during service and is compatible with all other spin-on cartridge replacements Quality desiccant material protects air system components from water damage which can lead to corrosion and freezing Cartridge ensures worry-free long term performance of air dryer and other downstream components, reducing vehicle downtime and repair costs * Per internal test as of April 2018 Cross Reference Alliance ABP N10G R950011 Armada BH109994 Automann 170.109994 Baldwin BA5374 Bepco 950011 Donaldson P781466 Haldex 950011K Midwest WA109994 NewStar S-A323 SORL 5008414BXW TRP AC1001 VIE V950011 Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

02Haldex Reservoir Purge Valve130003222021 CATALOG NUMBER 02 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ NEW ADDITION TO THE HALDEX DRAIN VALVE PRODUCT OFFERING As the newest advancement in the Haldex drain valve product offering, the Haldex Reservoir Purge Valve (RPV) promotes cleaner air systems by reducing the chance for contaminate build-up in the reservoir. Water, oil and other contaminates are purged upon setting the parking brakes or releasing the emergency air from the trailer. The new valve is available for trucks, tractors, trailers and dollies - anywhere a manual drain valve is required. Haldex Reservoir Purge Valve (RPV) PROMOTES CLEANER AIR SYSTEMS When operating an air brake system, it’s not a matter of “if”, but “when” will water, oil and other agents pollute the system. Contaminates are the number one cause of premature failure in valves and other critical components in any air brake system. In many cases, it is left to the vehicle driver to be the first line of defense. The Haldex Reservoir Purge Valve (RPV) gives the driver one less thing to worry about. The Haldex Reservoir Purge Valve (RPV) automatically promotes a cleaner air system by purging when the parking brake is set, or the emergency air is released from a towed vehicle. The valve, used anywhere an air reservoir is present, operates once supply air pressure is removed from the valve. Removal of the air opens the reservoir line to purge until the reservoir air pressure depletes to 95 psi. The valve then shuts off the purge operation and continues to maintain the reservoir pressure above 75 psi. MULTIPLE INSTALLATION OPTIONS The Haldex Reservoir Purge Valve (RPV) must be used in conjunction with a manual drain valve as prescribed in FMVSS-121. The valve is small and light weight and the built-in mounting bracket creates multiple installation options. Contact your Haldex Representative for assistance with retro-fitting instructions and new vehicle build opportunities. Built-In Mounting Bracket (2X Ø.27” Bolt Holes) MD KN21200 Reservoir Purge Valve MD 48100200 Filter Service Kit MD 42123048 Installation Kit Includes Reservoir Purge Valve MD K202016 Supplemental Bracket Kit Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==

02Bendix Charging Treatment and Storage Systems Troubleshoot Charging, Treatment and Storage Systems Troubleshooting Twin Cylinder Compressor Dash Gauge Standard Single Check Valve Governor Standard Single Check Valve (Used with Integral Purge Air Dryers) Air Dryer Safety Valve Dash Gauge Single Check/Protection Valve (Used Only With System Purge Air Dryers) Governor Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pressure Indicator Drain Valve Supply Rear Front Conventional Supply System & System Purge Air Dryer Dash Gauge Standard Single Check Valve Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pressure Indicator Drain Valve Dash Gauge Governor Air Dryer Rear Front Low Pressure Indicator Twin Cylinder Compressor Twin Cylinder Compressor Twin Cylinder Compressor Low Pressure Indicator Conventional Supply System & Integral Purge Air Dryer Two Reservoir Supply System & Bendix ® AD-IS ® Air Dryer Conventional Supply System & Bendix ® AD-9si ® Air Dryer Check Valves Not Required Twin Cylinder Compressor Dash Gauge Standard Single Check Valve G vernor Standard Singl Check Valve (Used with Integral Purge Air Dryers) Air Dryer Safety Valve Dash Gauge Singl Check/Pr tection Valve (Used Only With System Purge Air Dryers) G vernor Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pr ssure Indicator Drain Valve Supply Rear Front Co ve tional Supply System & System Purge Ai D yer Dash Gauge Standard Single Check Valve Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pr ssure Indicator Drain Valve Dash Gauge G vernor Air Dryer Rear Front Low Pr ssure Indicator Twin Cylinder Compressor Twin Cylinder Compressor Twin Cylinder Compressor Low Pr ssure Indicator Co ve tional Supply System & Integral Purge Ai D yer Two Rese voir Supply System & Bendix ® AD-IS ® Ai D yer Co ve tional Supply System & Bendix ® AD-9s ® Ai D yer Check Valves Not R quired Twin Cylinder Compressor Dash Gauge Standard Single Ch ck Valv Governor Standard Single Check Valve (Used with Integral Purge Air Dryers) Air Dryer Safety Valve Dash Gauge Single Check/Protection Valve (Used Only With System Purge Air Dryers) Governor Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pressure Indicator Drai Valve Supply Rear Front Conventional Supply System & System Purge Air Dryer Dash Gauge Standard Single Check Valve Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pressure Indicator Drai Valve Dash Gauge Governor Air Dryer Rear Front Low Pressure Indicator Twin Cylinder Compressor Twin Cylinder Compressor Twin Cylinder Compressor Low Pressure Indicator Conventional Supply System & Integral Purge Air Dryer Two Reservoir Supply System & Bendix ® AD-IS ® Air Dryer Conventional Supply System & Bendix ® AD-9si ® Air Dryer Check Valves Not Required Twin Cylinder Compressor Dash Gauge Standard Single Check Valve Govern r Standard Single Ch ck Valve (Used with Integral Purge Air Dryers) Air Dryer Safety Valve Dash Gauge Single Check/Protection Valve (Used Only With System Purge Air Dryers) Govern r Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pressur Indicator Drain Valve Supply Rear Front Conve tio al Supply System & System Purge Air D ye Dash Gauge Standard Single Check Valve Standard Single Check Valve Air Dryer Safety Valve Supply Rear Supp l y Front Low Pressur Indicator Drain Valve Dash Gauge Govern r Air Dryer Rear Front Low Pressur Indicator Twin Cylinder Compressor Twin Cylinder Compressor Twin Cylinder Compressor Low Pressur Indicator Conve tio al Supply System & Integral Purge Air D ye Two Reservoi Supply System & Bendix ® AD-IS ® Air D ye Conve tio al Supply System & Bendix ® AD-9si ® A r D ye Check Valves Not Requir d CATALOG NUMBER 02 www.midwestwheel.com Order NLINE ™ www.midwestwheel.com Order NLINE ™ TECH Tips Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 02Bendix Charging Treatment and Storage Systems Troubleshoot Complaints Common to the Charging & Air Supply System Complaint: Can Not Build System Pressure Compressor head / discharge line leakage (See Common Test 2) Discharge line is plugged or restricted (See Common Test 3) Unloader piston leakage (See Common Test 4) Air pressure is trapped between the governor and the compressor unloaders (See Common Test 5) “Blow leakage” at the air dryer exhaust (See Common Test 6) Complaint: Air System Builds Too Slow Compressor head / discharge line leakage (See Common Test 2) Discharge line is restricted (See Common Test 2) Air is leaking at the air dryer exhaust (See Common Test 6) Compressor head gasket failure • • Apply a soap solution around the cylinder head. If air leakage between the head and block is noted, repair or replace compressor. Air pressure trapped between the governor and compressor unloaders (See Common Test 5) Air system leakage (See Common Test 1) Complaint: Can Not Build System Pressure Above “X” psi. “Blow leakage” at the compressor unloaders • • Remove all hardware from the compressor inlet, then remove the governor. With 120 psi of shop air applied to the compressor unloader port, listen for air leakage at the inlet. If noted, repair the leak or replace the compressor. Caution! To prevent system damage, the ignition switch must be turned off manually if the system pressure reaches 130 psi. Incorrect setting on governor • • Verify the safety valve operation. Drain air from the system, remove or disconnect the governor from the compressor and install a gauge in the governor unloader (UNL) port. Build system pressure and note when the pressure on the dash gauge and the test gauge are equal. They should be equal at the maximum setting of the governor. Discharge line leakage (See Common Test 2) Note: The Bendix ® AD-IS ® air dryer must have pressure supplied from the compressor greater than its pressure protection setting to deliver air pressure to the system. Air system leakage (See Common Test 1) Compressor head gasket failure • • Apply a soap solution around the cylinder head. If air leakage between the head and the block is noted, repair or replace the compressor. • • “Blow leakage” at the air dryer exhaust during charge cycle (See Common Test 6) (See Common Tests on back page) Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 02Bendix Charging Treatment and Storage Systems Troubleshoot Complaint: Air Dryer Cycles “ON & OFF” Constantly This complaint is caused by leakage - either service system or supply system. Service system leakage is shown on dash gauges. Supply (wet tank) system leakage is not. Note: System purge air dryers may purge more often than those with an integral purge volume. Air system leakage (See Common Test 1) Supply system component leakage Drain the system, install a gauge and a shop air hose in place of the drain cock in the supply reservoir. Fill the system to 120 psi, shut off the shop air and check for leakage on the following components in the order presented. Compressor unloader • • Drain the system, remove the governor from the compressor, plug the governor UNL port and re-test. If the leakage is OK, repair compressor unloader mechanism or replace compressor. If the leakage is NOT OK, then continue. (See Common Test 4) Holset ECON valve (used with Holset Type “E & QE” compressors) • • Check for missing, malfunctioning or leaking ECON valve. If a Bendix DI (Drop-In) with a soft seat purge valve air dryer is installed, the ECON valve is not required. • • Is ECON valve required, but missing? If YES, install it and a special Holset check valve with choke. If NO, and ECON valve is present, replace the ECON valve and special check valve. If NO, and an ECON valve is not required, then continue. Air dryer • • Check for leakage. • • Remove the line from the air dryer inlet and - with 120 psi in the supply reservoir - soap the exhaust and inlet port of the air dryer. If the leakage is greater than one (1) inch bubble in one (1) second at the exhaust port, repair or replace the check valve (on dryers with integral purge volume) or replace the body assembly on system purge air dryers. If the compressor is a Holset type E or QE, verify the air dryer in use contains a soft seat purge valve. If the leakage is greater than one (1) inch bubble in one (1) second at the inlet port, repair or replace the purge valve assembly (on dryers with integral purge volume) or replace the turbo cut-off valve on system purge air dryers. Complaint: System Pressure Goes to 150+ psi • • Drain the air system to 0 psi; remove and disconnect the governor from the compressor. Start the engine and note the air pressure rise on dash gauges. Apply 120 psi shop air to compressor unloader port. If air pressure continues to rise, repair the compressor unloaders or replace the compressor. If the air pressure ceases to rise, repair or replace the governor. Complaint: Low Pressure Warning After Only 1 or 2 Brake Applications Brakes out of adjustment • • Adjust the brakes. • • Ensure proper operation of the tractor protection valve. Excessive system leakage on service (application) side of system • • Build the system pressure to governor cut-out and shut off the engine. With the park brakes released, make a full service application and note the dash gauges for two (2) minutes. The pressure drop on either gauge should not exceed 4 psi. (2 psi per min.) If the pressure drop is excessive, find the leakage in the service system. If it’s OK, then continue. Incorrect low pressure switch in use or setting incorrect • • Build the system pressure to governor cut-out. With the engine OFF and ignition ON, slowly drain the air pressure from one service reservoir. The low pressure warning will come on at minimum 60 psi, the recommended maximum is 10-15 psi less than the governor cut-in pressure. Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==