CAP/PLUG-TAPERED 9U7090 - 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.
Termination Date
December 31, 1993Problem
Certain 0R2693 Cylinder Kits may have been assembled with 0R5472 Pistons that contain improperly sized piston rings.
Action Required
Inspect all 0R2693 Cylinder Kits in parts stock with a date code prior to July 1, 1992. The date code is located on the part number tag on the outside of the packing box. The date code appears as a MMDDYY code (ie. 061292 = June 12, 1992). Remove the plastic protective plug from the top of the liner and check to see if "0R5472" is stamped on top of the piston. If "0R5472 " is stamped on the top of the piston, remove it from parts stock. If "0R5472" is not stamped on top of the piston, mark a red "X" on the box and return the cylinder kit to your parts stock.
Service Claim Allowances
Submit one claim for all 0R2693 Cylinder Kits removed from parts stock.
US and Canadian Dealers Only - When submitting a parts stock claim use 99Z00007 in the Product Identification Number Field.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.