ENGINE AR 2015971 - Caterpillar

Illustration 1 g01130109
A new method is used to retain the spanner nut (3) in the axle housing and flange groups in the front axle. The spanner nut is used to hold the wheel bearings. The new method uses a tab washer (2) that is held in position by three bolts (1). A tab on the tab washer engages a slot in the spanner nut in order to prevent the spanner nut from loosening.The former method used a dowel pin that engaged a slot on the spanner nut. The dowel pin was held in position by a spiral retaining ring.Adaptable To:
Table 1
New Parts and Former Parts    
QTY     Former Part Number     Part Name     Qty     New Part Number    
1     229-5080     Nut     1     226-4366    
1     229-5081     Ring Gear Hub     1     231-0745    
1     229-5083     Pin            
1     3E-4363     Retaining Ring            
        Tab Washer     1     226-4365    
        Self-Locking Bolts     3     226-4370    The former parts have been cancelled except the 3E-4363 Retaining Ring. The 3E-4363 Retaining Ring is used in other applications. The new parts replace the former parts. Refer to Table 1 for a listing of the new parts and former parts.
Table 2
Effectivity for the New Parts    
Model     Effective Serial Number    
416D     S/N:BFP9810-UP    
420D     S/N:FDP14898-UP    
420D     S/N:BLN8132-UP    
430D     S/N:BNK4415-UP    
430D     S/N:BML3557-UP    The new method that is used in order to retain the spanner nut in the axle housing and flange groups in the front axle became effective in production with the machines that are listed in Table 2.When you do not lubricate the threads, the proper preload on the bearings will be obtained when you tighten the spanner nut to 1000 N m (740.0 lb ft). When you apply 4C-5593 Anti-Seize Compound to the threads and the mating surface of the nut, the proper preload on the bearings will be obtained when you tighten the spanner nut to 800 N m (590.0 lb ft).Note: A 246-5254 Spanner Wrench is available in order to tighten the former 229-5080 Nut. A 230-7923 Spanner Wrench is available in order to tighten the new 226-4366 Nut .Torque the three 226-4370 Self-Locking Bolt to 70 N m (50.0 lb ft).Note: It may be necessary to move the spanner nut slightly in order to get the dowel pin or the three bolts installed. Always tighten the spanner nut in order to get the necessary alignment.