SCREW-PLUNGER GEAR 8H9299 - Caterpillar

Caterpillar: Confidential Yellow
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 "PS4349" 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
February 28, 1999Problem
The drive plates in certain generator sets have been assembled using an incomplete 2N7025 Plate Assembly. A complete plate assembly will need to be installed.
Affected Product
Model & Identification Number
3304B (9HK332-379)
Parts Needed
1 - 2N7025 Plate Assembly8 - 5P8245 Washer8 - 9S1366 BoltAction Required
See the attached rework 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.
Attach.(1-Rework Procedure)Rework Procedure
This rework procedure requires moving the generator backwards to allow support by the base crossmember. Therefore, all pipe work and wiring not shown in this procedure must be given adequate slack or be disconnected. Make sure all Safety procedures are followed and disconnect electrical power to the system by removing the battery negative cable from the batteries.
Preparation Prior To Disassembly
1. Remove the bulkhead panel by removing the bolts securing the bulkhead panel to the enclosure.2. Remove the bolts securing the generator barrel guard to the generator and remove the guard from the enclosure. Disassembly Of Generator From Engine
1. Remove the bolts securing the generator screen and remove the screen.2. Remove the earth ground bolt from the pad on the generator base.3. Turn the engine over to Top Dead Center (TDC). Remove the top flywheel to generator drive plate bolt and install a guide bolt. Remove the remaining flywheel to generator drive plate bolts.4. Remove the generator foot bolts on each side. Using hydraulic jacks, properly supported underneath by base crossmembers to prevent damage to the base, one under each side on the flywheel housing mounting pad, raise the generator a maximum of 13mm clearance at the generator foot. Place supports under the flywheel housing to support the weight of the engine and avoid supporting the engine on the plug in the bottom of the flywheel housing.5. Fit slings around the underside of the generator just in front and in back of the foot.6. Take up slack in the slings.7. Remove the flywheel housing bolts and take up the weight of the generator using the slings. The generator can now be guided away from the engine. Provide support at the base crossmember for the generator foot. Remove And Install New Drive Plates
Prevent rotor from turning during this sequence.
1. Remove bolts on drive plate to generator rotor