BRACKET 1977836 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below. ReferenceOperation and Maintenance Manual, SEBU6250, "Caterpillar Machine Fluids Recommendations "ReferenceOperation and Maintenance Manual, SEBU5898, "Caterpillar Machine Fluids Recommendations "Problem
Illustration 1 g03824957
Typical Front Wheel GpThe bearing cone (B), bearing cone (C), bearing cup (D), and bearing cup (E) in the front wheel group may fail on the machines listed above. The failure may be due to contamination, low viscosity, incorrect preload, application load, operating conditions (ie. multiple/tight switchbacks), or bearing quality.Solution
Caterpillar is aware of this problem. In the event of failure, replace the failed parts with new same parts.
Table 1
Sales Model     Item     Part Number     Description    
784
785     E     9D-0994     Inner Cup    
B 9W-7093     Inner Cone    
D 9W-7096     Outer Cup    
C 9W-7095     Outer Cone    
789     E     9D-0994     Inner Cup    
B 289-2131     Inner Cone    
D 9W-7096     Outer Cup    
C 9W-7095     Outer Cone    
793 STD     E     290-3830     Inner Cup    
B 290-3829     Inner Cone    
D 9W-7096     Outer Cup    
C 9W-7095     Outer Cone    
793 XLP     E     174-4504     Inner Cup    
B 212-5027     Inner Cone    
D 183-9519     Outer Cup    
C 183-9520     Outer Cone    
793F AC     E     174-4504     Inner Cup    
B 212-5027     Inner Cone    
D 183-9519     Outer Cup    
C 183-9520     Outer Cone    
795F AC     E     282-3848     Inner Cup    
B 434-5017     Inner Cone    
D 174-4504     Outer Cup    
C 212-5026     Outer Cone    
797     E     282-3848     Inner Cup    
B 434-5017     Inner Cone    
D 174-4504     Outer Cup    
C 212-5026     Outer Cone    Caterpillar recommends the following actions to minimize risk of failure and contingent damage:Monitor magnetic plugs at every 250 hours and monitor Schedule Oil Sampling (SOS) at every 500 hours. Use Caterpillar Final Drive and Axle Oil (FDAO) or equivalent. FDAO has an additive package with superior scuffing resistance to TO4 oil.First Choice - Caterpillar FDAO of the recommended viscosity grade.Second Choice - commercial oil of the recommended viscosity grade that meets the Caterpillar FD-1 specifications.