FRAME AS 3512681 - 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 "PS4158" 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
August 31, 1998Problem
The fixed axle may have been assembled with incorrect sun shafts on certain 816F Compactors. New sun shafts may need to be installed.
Affected Product
Model & Identification Number
816F (5FN253, 5FN254, 5FN255, 5FN257, 5FN262, 5FN264, 5FN265, 5FN266, 5FN268, 5FN270, 5FN271, 5FN273, 5FN274, 5FN275, 5FN276, 5FN277, 5FN278, 5FN279, 5FN280, 5FN282, 5FN284, 5FN285, 5FN288, 5FN289, 5FN293, 5FN294, 5FN295)
5FN253, 254, 255, 257, 264, 274, 275 and 277 were previously repaired. They are eligible to use this program if the wrong shaft was installed during the previous repair.
Parts Needed
1 - 6V6640 Sealant2 - 1191097 Gear - Sun2 - 1191098 ShaftAction Required
See the attached Rework Procedure.
Service Claim Allowances
This is a 22-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
The following (27) machines are in the suspect serial number range and according to factory MSO information contain the 1191088 Front Axle Arrangement (Fixed) that may have the wrong configuration sun shafts installed:
5FN253, 254, 255, 257, 262, 264, 265, 266, 268, 270, 271, 273, 274, 275, 276, 277, 278, 279, 280, 282, 284, 285, 288, 289, 293, 294, 295.
1. Remove the front axle arrangement (fixed) according to 816F Landfill Compactor Disassembly and Assembly Manual, SENR1300-00. Refer to Front Axle Housing Group (Fixed). Drain the oil from the axle.2. Position the axle arrangement according to 816F Landfill Compactor Disassembly and Assembly Manual, SENR1300-00. Refer to Axle Shaft Assemblies section.3. Remove the (26) bolts that retain the axle shaft housing to the center section of the axle arrangement.4. The correct sun shaft configuration for a 816F Landfill Compactor with the 1191088 attachment fixed axle (no spin differential) is a 1191098 Shaft - Two Piece and 1191097 Gear. If the axle group contains a one piece 9U2786 Shaft discard and replace with two piece configuration.5. Remove the planet carrier assembly and check the part number on the carrier assembly. 1191096 Carrier is the correct carrier number.6. Clean the mounting surfaces on both the shaft housing assembly and the center housing assembly, apply 6V6640 Gasket Maker.