COMPRESSOR- 9U6613 - 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 must be administered as soon as possible. When reporting the repair, use "PI3574" as the Part Number, "7751" as the Group Number, "56" as the Warrdnty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3574" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
This Program is to be done in conjunction with the January 25, 1992 Service Letter - PI1186 and the January 27, 1992 Service Letter - PS4715.
This Revised Service Letter replaces the January 26, 1992 Service Letter. Changes have been made to the Affected Product.
Completion Date
July 31, 1992Termination Date
January 31, 1993Problem
A drain plug needs to be installed in the idler hub of certain Challenger 65 and Challenger 75 Tractors to permit draining and refilling with oil while the idler is installed on the tractor. In addition, the bearings, spindles and hubs will be inspected/replaced and a torque preload of 135 N m (100 lb ft) will be used for assembly.
Affected Product
Model & Identification Number
Ch 65 (7YC1-1937,7YC1939-1941,7YC1943-1951,7YC1953-1956,7YC1958,7YC1959,7YC1961,7YC1963-1965,7YC1967-1971,7YC1973,7YC1975-1978,7YC1980,7YC1982,7YC1984-1994,7YC1996--2002,7YC2004-2007,7YC2009,7YC2011-2020,7YC2023,7YC2028,7YC2030-2035,7YC2037,7YC2040,7YC2042-2046,7YC2050,7YC2051,7YC2054-2056,7YC2061,7YC2064,7YC2065,7YC2068,7YC2069,7YC2071-2077,7YC2079-2082,7YC2086-2088,7YC2090-2093
Ch 75 (4CJ1-335,4CJ337-340,4CJ342,4CJ344-348,4CJ350-352,4CJ354-356,4CJ375-378,4CJ380-394,4CJ396,4CJ397,4CJ399-402,4CJ404,4CJ407-435)
Parts Needed
Dealers will need to order parts for this Program.
2- 056865 Lockwasher (Use as required)2- 6D7690 Cup2- 6H3568 Cup2-7K0394 Cone2- 5P3723 Cone2- 2R8942 Plug2-8R0625 Spindle (Use as required)2-8R5037 Hub Assembly (Use as required - includes cups)2-3W5687 Hub Cap (Use as required)2- 3W6998 Gasket2- 9W6645 Seal GroupAction Required
Parts Stock
Rework all 8R5037 Hubs in parts stock.
Affected Product
The January 20, 1992 Service Magazine article "Improved Front Idler Hub Assembly" describes the update and gives the procedure for installing the drain plug and the revised preload used for assembly.
If it is necessary to install new bearings, spindles and/or hubs, refer to the Service Manual.
Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
Parts Stock
Submit one claim for reworking all 8R5037 Hubs in parts stock. A maximum of 1 hour per hub will be allowed for the rework.
Affected Product
This is an 8-hour job, 5 hours for undercarriage removal and installation, and 3 hours for reworking the hubs.
It is recommended that this Program be implemented at the same time as the January 25, 1992 Service Letter - PI1186 and the January 27, 1992 Service Letter - PS4715.
U.S. and Canadian Dealers Only - This Program does not qualify for a Type 2 SIMS Report.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach. (1-Owner Notification)Copy Of Owners Notification For U.S. And Canadian Owners