PUMP GP-PS-BSC-V 20R7025 - Caterpillar

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 "PS8403" 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.
This Revised Service Letter replaces the June 20, 1995 Service Letter (Revised July 1997). Changes have been made to the attached Rework Procedure.
Termination Date
July 31, 2000Problem
The rear track roller frame (six rollers) may experience cracks at the bulkhead plate joint on certain D6H Standard Tractors.
Affected Product
Model & Identification Number
D6H (4RC5500-5917 3ZF5500-6431 4LG5500-5724 6CF5500-5761 1FJ5500-5545 )
Parts Needed
2 - 5G9842 Seal2 - 9M3786 Seal-O-RingAction Required
See attached rework procedure.
Service Claim Allowances
This is a 20-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1 - Rework Procedure)Rework Procedure
This program does not apply to the tractors equipped with the 3A8413 Fine Grading Arrangement.
INSPECTION PROCEDURES
Inspect the track roller frame weld joints for any signs of cracking in the weld joints at the bulkhead at the rear of the recoil housing, at the gusset-to-rear plate, and at the corner of the side plate. If no cracks are found, add a new gusset to each track roller frame as described in the procedures under BEFORE FAILURE. If any cracks are found in the weld joints or side sheet, go to the AFTER FAILURE procedures. See Illustration 1 for areas to be inspected.
Illustration 1. BEFORE FAILURE REPAIR PROCEDURE (no cracks found during inspection):
1. Clean paint from area around rear lifting hook and along the existing gusset.2. Remove the lifting hook by cutting at the welds. This hook will be installed again after the addition of the new gusset.3. Fabricate a formed gusset using 10 mm thick 40,000 psi minimum yield structural steel. Finished dimensions of formed gusset are shown in Illustration 2. An alternate method that can be used is to install two triangular gussets as shown in attached Illustration 3. The existing low gusset does not need to be removed - the new gusset will fit over it.
Illustration 2.
Illustration 3. 4. Position the new gusset on the roller frame and grind as necessary for a fit up before welding. Weld in place using E7018 low hydrogen electrode. Avoid any welding starts/stops in the lower corner of the gusset at the joint at the bottom. The 45° cutout in this area will need to be filled with weld to avoid any water entry under the gusset.5. Position the lifting hook removed in Step 2 as shown in Illustration 1 and weld in place with an 8 mm fillet weld using an E7018 low hydrogen electrode.6. Paint the repaired area.AFTER FAILURE REPAIR (cracks are found during inspection):
1. See special Instructions REHS0540 "Repair of the Rear Track Roller Frame at the weld