PUMP GP-FUEL PRIMING 7N4435 - Caterpillar

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.
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 "PS8766" 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.
Termination Date
August 31, 1997Problem
The 102-4167 or 128-4111 Screen that is a part of autoshift transmission controls might fail and cause the pilot operated selector spools to jam in certain 988F, 990, and 992D Loaders.
Affected Product
Model & Identification Number
988F* (8YG567-1471 2ZR128-196 )
990* (7HK107-252 4FR190-196 )
992D* (7MJ260-537)
*If equipped with a transmission with one of the following serial numbers.(1SX1097-1982, 1SX1994, 1SX1995, 1SX2033, 1SX2038-2040)
(7TX626-647)
(9XE643-794)
(2ZX838-1100, 2ZX1108)
(2JY622-635)
0R4009, 0R4012, and 0R4016 with Serial Number prior toT3418 are also included in this program.
Parts Needed
Not Applicable.
Action Required
See the attached procedure.
Service Claim Allowances
This is a 4-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach.(1-Rework Procedure)Rework Procedure
1. Remove transmission hydraulic control valve package.2. Remove the tie bolts that hold the bodies together to expose the 102-4167 or 128-4111 Screen. (See Illustration for location of screen)3. Remove and examine the screen. If the screen is intact (no portions missing), reassemble the control valve package without a screen. Reinstall the control valve according to service manual procedures.4. If portions of the screen are missing, completely disassemble the valve groups, clean all parts and insure that orifices are open, and inspect all parts for damage. Reassemble the control valve without a screen. Install any other new Parts Needed due to damage (if any). Reinstall in machine.
Screen Location in Typical Autoshift Control Valve Group