HARNESS AS-SENSOR 3916256 - 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 "PS4701" 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
December 31, 1999Problem
Some customers have complained of poor performance from 190 Hp 3126/3126B Engines when used with the Allison AT545 Transmission.
Affected Product
Model & Identification Number
3126 (1WM1-99999)
3126B (7AS1-36237)
Parts Needed
Dealers will need to download the most current 190 Hp high performance (AT545) file.
Action Required
Flash the engine with the most current 190 Hp high performance (AT545) file. Consult the find system for the most current part number. This procedure does not require factory passwords. Before Flashing in this new file, contact the OEM to be sure that the improved power curve does not negatively impact the cooling system.
Service Claim Allowances
This is a 0.5-hour job. When claiming for labor, use labor code 1901-591.
All claims must include the Transmission model and serial number.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.