TORQUE CONVERTER & HOUSING GP 3875630 - Caterpillar

Caterpillar: Confidential Yellow
PSP FOR INSTALLING A NEW ENGINE SPEED SENSOR IN CERTAIN 3406B PEEC ENGINES - PS0547 - MAILED US AND CANADA, COFA, TRUCK TEPS
  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.
May 10, 1991 U-95 AU-55 TT-5 PRODUCT SUPPORT PROGRAM FOR INSTALLING A NEW ENGINE SPEED SENSOR IN CERTAIN 3406B PEEC ENGINES 1705 PS0547 This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS0547" as Part Number, "7755" as Group Number, and "96" as Description Code. Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible. Termination Date
May 31, 1992
Problem
The engine speed sensor may fail in certain 3406B PEEC Engines. The sensor core may come loose and come in contact with the retainer at the end of the camshaft. this could lead to speed fluctuations, intermittent power loss, oran engine that will not run.
Affected Product
Model Identification Number 3406B 8TC1-12736, 13053-13164
Parts Needed
1 - 9X9655 Sensor-Magnetic (Engine Speed) 1 - 4W2488 Gasket 1 - 4W2489 Gasket
Action Required
***** Parts Stock ***** Remove all 6T6975 and 9X6844 Sensors-Magnetic (Engine Speed) from parts stock. *****