BEARING 1446023 - 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 "PS4852" 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.
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, 2000Problem
The bolts that retain the belt drive wheels to the wheel hub can loosen in service. The former drive wheel backup ring segment material is too soft. The ring segments and washers need to be replaced, and the bolts retorqued. The bolts that retain the axle shaft to the wheel hub can also loosen in service. They need to be retorqued.
Affected Product
Model & Identification Number
CH65E (6GS1-450, 6GS453-484)
CH75E (6HS1-201, 6HS203-276, 6HS278, 6HS280-314, 6HS316-433, 6HS435, 6HS437, 6HS440-441, 6HS443, 6HS446-448, 6HS453-468)
CH85E (6JS1-296, 6JS298-470, 6JS472-473, 6JS475-478, 6JS491, 6JS493, 6JS495, 6JS497-501, 6JS505, 6JS508-510)
CH95E (6KS1-602, 6KS608, 6KS612-625, 6KS627-630, 6KS632-641, 6KS644, 6KS646-648, 6KS651-655)
Parts Needed
1 - 4C4198 PAINT-BLACK 36 - 5P8249 WASHER-HARD6 - 1591229 RING SEGMENTAction Required
Parts Stock
Remove all 8R-9379 Ring Segments from Parts Stock.
Affected Product
See the attached rework procedure.
Service Claim Allowances
Parts Stock
Submit one claim for all 8R-9379 Ring Segments removed from Parts Stock.
Affected Product
This is a 1.8-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
1) Position the tractor on a smooth level surface such that one of the three 8R-9379 Drivewheel Backup Ring Segments on the right hand side of the tractor is in the forward position (to minimize loading due to belt tension). Shut down tractor. Apply parking brake. 2) Remove the (6) 1D-4628 Bolts and (6) 5P-8249 Washers retaining the 8R-9379 Ring Segment. Retain the bolts. Discard the washers and ring. (Refer to Illustration 1.)3) Make sure the mating surface of the drive wheel and both sides of a new 159-1229 Drivewheel Backup Ring Segment are clean. Install the Ring Segment using the (6) retained 1D-4628 Bolts and (6) new 5P-8249 Washers.4) Tighten each of the bolts to 325 40 N m (240 30 lb-ft). Then turn each an additional 60 5°.5) Repeat Steps 1-4 for a second 8R-9379 Ring Segment.6) Repeat Steps 1-4 for the remaining 8R-9379 Ring Segment.7) Slightly loosen two diametrically opposite 1D-4625 Bolts that retain the axle shaft to the wheel hub. Maintain approximately 205 N m (150 ft-lb) torque to prevent breaking the liquid gasket seal. (Refer to Illustration 1.)8) Retighten the bolts to 325 40 N m (240 30 lb-ft). Turn an additional 60 5°.9) Continue the retightening process in a similar manner moving around the axle shaft until all twelve bolts have been retorqued.10) Repeat Steps 1-9 for the left hand