F10144 Force THROTTLE SHAFT RETURN SPRING

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PSP FOR UPDATING THE GOVERNOR SHUTOFF GROUP ON CERTAIN 3408 AND 3412 GENERATOR SET AND INDUSTRIAL ENGINES EQUIPPED WITH ENE RGIZE TO RUN FUEL SHUTOFF SOLENOIDS - PS4539 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
  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.
U-243 A-167 AU-154 E-149 O-184 1259 PS4539 This Program can be administered either before or after a failure, but before failure is recommended. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4539" as Part Number, "7755" as Group Number, and "96" as Description Code. Termination Date
December 31, 1991
Problem
Governor damage may occur on certain 3408 and 3412 Generator Set and Industrial Engines equipped with a 7W7787 Shutoff Group (7W1075 Solenoid Assembly). Repeated shutdown cycles may eventually fatigue the 2H3429 Ring and allow the ring to disengage from the bearing guide.
Affected Product
Model Identification Number 3408* 67U12515-13651 78Z2440-3995 3412* 81Z6307-10896 * If equipped with a 7W7787 Shutoff Group (7W1075 Solenoid Assembly) (ETR - Energize to run).
Parts Needed
2 - 4B9365 Bolt 1 - 7E6073 Bolt 1 - 7E8699 Cover 1 - 4J8265 Nut 1 - 6L1597 Gasket 1 - 5M2894 Washer
Action Required
Remove the fuel shutoff solenoid and the thin cover opposite the solenoid from the governor housing. Install the new parts as shown in the illustration and perform the following adjustment procedure. If the engine is already equipped with the adjustable stop bolt, verify that the adjustment is correct. Adjustment Procedure With the solenoid removed, use the manual shutoff lever to rotate the manual shutoff shaft to the maximum position in the shutoff direction. While holding the shaft in this position, adjust the 7E6073 Bolt (solenoid stop bolt) clockwise until the headed end of the bolt contacts the internal shutoff lever. Continue to turn the 7E6073 Bolt inward an additional 3/4 +/- 1/4 of a turn. Tighten the 4J8265 Nut to lock the solenoid stop bolt in this position. Install the seal wire and the dealers governor seal. The above procedure should be followed each time the solenoid or the adjustable bolt stop and cover are removed from the governor. ****** IMAGE: SEBE4463.00001.001 CAPTION:
Service Claim Allowances
Product Caterpillar Dealer Suggested Customer Suggested smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. 0-7500 100% 1 0 0 0 0 0-48 mo This is a 1-hour job.
Parts Disposition
Any parts removed (with the exception of cores used for Caterpillar Remanufactured parts) can be rendered useless and scrapped immediately upon completion of the repair.