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