CONTROL GP-HYDRAULIC HAND 9R7600 - 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 "PS4210" 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
October 31, 1998Problem
New software has been developed to improve the up-shift strategy on oil well service engines and to solve the low idle instability.
Affected Product
Model & Identification Number
3512 (1LM23-141)
Parts Needed
1 - 8C6354 Cap1 - 1198131 Control Group (for serial numbers 1LM23-47)1 - 1489587 Control GroupAction Required
1. Install new software.2. Check and calibrate the rack position sensor and rack actuator linkage as indicated in SENR6493-01.3. Install a diagnostic dust cap on engine serial numbers 1LM23 through 1LM47.4. Replace any 1045073 MUI Interface Control Groups with a 1198131 Control Group.Service Claim Allowance
This is a 2-hour job.
Parts Disposition
Return the 1045073 Controls to:
Caterpillar, Inc.
Claims Room,
Attn: Ray Kulma
3701 State Road 26 East
Lafayette, Indiana 47905