19Top Plate Rebuild v Replacement Tech Tip TECH Tips CATALOG NUMBER 19 www.midwestwheel.com NLINE www.midwestwheel.com Order NLINE ™ Introduction Holland fifth wheels are designed to provide years of durable, reliable service to our customers. However, as with all components subject to wear, there may come a time when rebuilding of the lock mechanism, or replacement of the entire top plate, will be required to restore the fifth wheel to its optimum performance condition. This bulletin is a checklist that will assist in making the choice between rebuilding or replacement of your fifth wheel. Inspection Preparation The fifth wheel top plate should be removed from the tractor and sufficiently cleaned before working through the checklist (Figure 1) . This will allow the inspector to fully evaluate the points in the check list. IMPORTANT: See your Owner’s Manual for proper removal of your fifth wheel model. This checklist applies to all Holland XA-351, XA-311, XA-AL, XA-331, XA-231, XA-17, XA-S1, XA-S2, XA-201, XA-3501, and XA-2009 Series top plates — except where noted. If the inspector answers YES to any of the criteria, the top plate assembly is NOT a candidate for rebuilding, and should be replaced with an appropriate Holland replacement top plate. If you answer NO to all of the criteria, the lock mechanism and fifth wheel top plate are good candidates for rebuilding. Inspection Check List YES NO 1. Perform a thorough inspection of the entire fifth wheel casting. Were any cracks discovered? 2. Is there any evidence of weld repair on the casting? 3. Measure the flatness of the top surface of the fifth wheel casting using a straight edge that reaches across the top plate from one side to the other. Is the top plate surface warped by more than 1/8˝ (Figure 2) ? NOTE: By holding the straight edge flat to the fifth wheel surface on one side of the center of the fifth wheel, and measuring the gap on the opposite side, you can accomplish this measurement. continued XL-SB058-01 Rev A · 2009-12-09 · © SAF-HOLLAND, Inc. Figure 1 AREA OF EXAMINATION (FOR FIGURES 3 AND 4) Service Bulletin Holland Fifth Wheels Top Plate Rebuild vs. Replacement Criteria Inspection Check List XA-351, XA-311, XA-331, XA-AL, XA-17, XA-S1, XA-S2, XA-201, XA-231, XA-3501, and XA-2009 Series Top Plates Figure 2 Top Plate Rebuild vs. Replacement Criteria Inspection Check List XA-351, XA-311, XA-331, XA-AL, XA-17, XA-S , XA-S2, XA-201, XA-231, XA-3501, and XA-2009 Series Top Plates Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA== 19Top Plate Rebuild v Replacement Tech Tip 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 TRUCK PARTS SUPER STORE TM KANSAS CITY 5801 E. Front St. main 816.471.1552 fax 816.471.0813 parts 800.821.7402 JOPLIN 2424 Stephens Blvd. main 417.717.6022 fax 417.782.7126 parts 866.318.9111 Service Bulletin SAF-HOLLAND USA, Inc. · 888.396.6501 · Fax 800.356.3929 SAF-HOLLAND Canada Limited · 519.537.3494 · Fax 800.565.7753 Western Canada · 604.574.7491 · Fax 604.574.0244 www.safholland.us XL-SB058-01 Rev A · 2009-12-09 · Amendments and errors reserved · © SAF-HOLLAND, Inc. 1.50(38.10) MAX. 1.45(36.83) NEW R Figure 4 .04 (1.02) MIN. .06 (1.52) NEW HINGED LOCK CASTING Figure 3 SECTION VIEW Inspection Check List YES NO 4. Is there evidence of damage to the top surface of the casting in the area where the lock components move to their open position during uncoupling (Figure 3) ? NOTE: The lock components should move freely into their unlocked position in the casting with a .040˝ minimum vertical clearance to the casting, both above and below the lock. 5. Check the tightness of the lock pin(s) to the fifth wheel. Can the lock pins rotate in the fifth wheel? Is there evidence of rotation exhibited in the holes in the casting? NOTE: This inspection only applies to XA-351, XA-311, XA-331, and XA-3501 top plates. 6. Inspect the top surface of the top plate for evidence of excessive wear. Is there any point on the top plate surface where the grease groove pattern has been worn away? 7. Inspect the inside pocket area of the casting where the bracket is mounted. Is there evidence of excessive wear to the grease groove in the pocket area? NOTE: This inspection only applies to XA-3501 and XA-2009 top plates. 8. Check the tightness of the bracket pins to the fifth wheel casting. Can the bracket pins rotate freely in the casting, and/or can the replacement pin be installed easily by hand? NOTE: This inspection only applies to XA-3501 and XA-2009 top plates. 9. Check the radius of the front lock of the casting using a radius gauge. Is the radius 1.5˝ or greater (Figure 4) ? NOTE: This inspection does not apply to XA-311, XA-3501, or XA-2009 top plates. If the inspector answers YES to any of the criteria, the top plate assembly is NOT a candidate for rebuilding, and should be replaced with an appropriate Holland replacement top plate. If you answer NO to all of the criteria, the lock mechanism and fifth wheel top plate are good candidates for rebuilding. March 19, 2020 (19Top Plate Rebuild v Replacement Tech Tip) Made with FlippingBook RkJQdWJsaXNoZXIy MTEyNjY3NA==