SUPPORT 3599905 - 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 "PS4266" 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
March 31, 2000Problem
The parking brake piston seals are easily cut at assembly and can result in cocking of the piston in the bore and possibly a brake that does not completely release.
Affected Product
Model & Identification Number
994 (9YF1-214)
Parts Needed
4 - 5J5402 Seal As2 - 1490589 Piston2 - 1490593 CylinderAction Required
Disconnect the oil line going to the rear of the two brake cylinders.
Remove the 2G5459 Bleed Screw from the pistons.
Remove the existing cylinders pistons and seals.
Install the 5J5402 Seals on the 1490589 Pistons.
The pistons must be installed in the 1490593 Cylinders with the two holes in the pistons facing towards the outside. These holes allow trap oil to escape.
Install the new cylinders on the parking brake.
Install the 2G5459 Bleed Screws.
Connect the hoses to the cylinders.
Service Claim Allowances
This is a 2-hour job.
If there has been a previous repair in which the customer participated, part age will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.