COVER 9N3383 - Caterpillar

Caterpillar: Confidential Yellow
PSP FOR REPLACING THE CONNECTING ROD BEARINGS IN CERTAIN 3406B TRUCK ENGINES - EFFECTIVE OCTOBER 09, 1990 - PS6041 - MAILED US AND CANADA, COFA, CFEL, TRUCK TEPS, LIMITED COSA
  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.
(Effective October 9, 1990) U-241 AU-152 E-147 O-183.4 TT-20 1219 PS6041 This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS6041" as Part Number, "7755" as Group Number, and "96" as Description Code. Termination Date
December 31, 1991
Problem
A single connecting rod bearing may fail on certain 3406B Truck Engines. When this bearing fails, no smearing or scratching of adjacent bearings will be detectable.
Affected Product
Model Identification Number 3406B 7FB1-UP 8TC1-UP 4MG1-UP
Parts Needed
6 - 9Y9497 Bearing-Connecting Rod
Action Required
After a rod bearing fails, check the fuel settings and timing advance adjustment to determine if these conditions contributed to the bearing failure. If the engine is found to have been adjusted in excess of specification, this Program cannot be applied. Follow the procedures in the Service Manual and repair the engine. Caterpillar Remanufactured Crankshafts are to be used. Locally reground crankshafts are not authorized in these repairs.
Service Claim Allowances
Product Caterpillar Dealer Suggested Customer Suggested miles/age Parts Labor