Usage:
NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
NOTE: This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4788" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use " T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use " Z" as the SIMS Description Code.
NOTE: This Revised Service Letter replaces the September 25, 1992 (Revised October 1992) Service Letter. In this revised Service Letter, the Action Required was changed.
Termination Date
September 30, 1994Problem
The 7U6763 Mid Shaft Bearing may fail on certain D350D and D400D Articulated Trucks. An improved bearing is available that has a higher capacity.
Affected Product
Model & Identification Number
D350D (9RF1-455)
D400D (8TF1-485); 4EJ1-20)
Parts Needed
- 1 - 8E9569 Bearing
- 1 - 8T9044 Ring
- 1 - 2U7706 Housing
- 2 - 2U7708 Carrier Seal
- 1 - 2U8386 Yoke
- 1 - 7U6691 Housing
- 2 - 7X4791 Seal
- 1 - 8T9044 Ring
Action Required
Parts Stock
Remove all 7U6763 Bearings from parts stock.
Affected Product
Remove the existing bearing arrangement and replace it with the new parts as described in the January 18, 1993 Service Magazine Article "New Mid Bearing Arrangement Provides Longer Life.
Service Claim Allowances
Parts Stock
Submit one claim for all 7U6763 Bearings removed from parts stock.
Affected Product
NOTE: This is an 8-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.