MOTOR GP 5210547 - 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 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 "PS8946" 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, 1998Problem
The 1258155 Nut which retains 1258156 Ring of the 1197219 Steering Cylinder may come loose and damage the nut and cylinder rod on certain CS-531C, CP-533C, CS-533C, CP-563C, CS-563C, CS-573C, and CS-583C Vibratory Soil Compactors.
Affected Product
Model & Identification Number
CS-531C (9RN1-248)
CP-533C (3YN1-57, 3YN59-61)
CP-563C (5KN1-111, 5KN113-150)
CS-563C (4LN1-272, 4LN278-281, 4LN286-289, 4LN291-297, 4LN300-309)
CS-573C (6LN1-67)
CS-583C (7NN1-138)
CS-533C (2XN1-177, 2XN180-183)
Parts Needed
2 - 1258157 Seal KitAction Required
See the attached procedure.
Service Claim Allowances
This is a 6-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
A. CYLINDER REMOVAL1. Position machine on a level surface.2. Install steering pivot lock pin.3. To gain access to the steering cylinders, tilt the cab or operators platform. See machines O&M Manual for instructions.4. Remove and cap or plug all hydraulic fittings and hoses to the steering cylinders. Identify all hydraulic lines as they are removed for reinstallation purposes.
5. Remove cylinder mounting pins and cylinders.B. DISASSEMBLY OF CYLINDER (Ref Dwg 1197219)1. Unscrew Nut, 1258155, from Ring, 1258156 and push ring into cylinder bore.2. Insert punch into hole in cylinder wall and compress the Snap Ring 1258154. Remove the snap ring from groove in cylinder wall.3. Slowly slide out rod and piston assembly.4. Unscrew piston retention nut from rod end and remove piston, ring and ring nut.C. CYLINDER REWORK PROCEDURE1. Hold the ring, part no. 1258156, in a vise and drill two holes 6.2 dia X 7 mm deep X 60 mm apart into the threaded end. See 1258156 Ring Illustration.2. Hold the nut, part no. 1258155, in a vise. Drill and tap two M8 x 1.25-6H thread holes in the side, 90 degrees apart. See 125-8155 Nut Illustration. Protect