COUPLING GP-GENERATOR 4343233 - 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 only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS0934" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
This Revised Service Letter replaces the April 19, 1996 Service Letter. Changes have been made to the Parts Needed and Rework Procedure.
Termination Date
April 30, 1997Problem
The bottom plate of the original swivel wears and/or deflects causing bolt loosening or stretch allowing swivel leakage on certain 5130 Excavators.
Affected Product
Model & Identification Number
5130 (5ZL27, 5ZL29, 5ZL31-72)
Parts Needed
1 - 9D8042 Seal 0-Ring 3 - 8T4176 Bolt6 - 8T6685 Bolt2 - 951728 Seal - O-Ring1 - 1303367 Retainer1 - 1303368 Retainer1 - 1303369 Spacer1 - 1304737 Bearing - Needle2 - 1304738 Race - Thrust1 - 1325073 Plate Assembly2 - 1373894 ShimsAction Required
See the attached Rework Procedure.
Service Claim Allowances
This is a 2-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
1. Remove the 6I7399 Plate from the bottom of the swivel. Save the bolts and washers for later use.2. Remove the 6E6264 Cover from the bottom of the swivel and save cover. (See Illustration 1.)3. Remove and discard three bolts and 1164195 Retainer as shown in Illustration 1. 4. Measure the thickness of the 1303367 Retainer.5. Install the 1303368 Retainer, first 1304738 Race, 1304737 Bearing, second 1304738 Race and 1303367 Retainer. Secure with 3 - 8T4176 Bolts and tighten to a torque of 105 10 N m (75 7 lb ft). See Illustration 2.6. Use a depth micrometer to measure in the center hole in the retainer to the end of the rotor. If this distance is more than the thickness of the retainer, check the gap between the outer housing and the flange at the top of the rotor. It must be less than 0.15 mm (.006 in) or something is binding in the assembly and it must be fully disassembled.7. Subtract the thickness of the retainer from the depth micrometer reading and add enough 1373894 Shims to assure that the thickness of the shims and the retainer are 0.15 mm (.006 in) to 0.50 mm (.020 in) greater than the depth micrometer reading.8. Remove the parts installed in step 5 and reassemble using the 0951728 Seal, with the shims placed between the retainer and the end of the rotor. Check the gap between the outer housing and the flange at the top of the rotor. It must be between .015 mm (.006 in) and 0.050 mm (.020 in). If not, redo steps 4 through 8.9.