BUSHING 2255438 - Caterpillar

Caterpillar: Confidential Yellow
SERVICE LETTER SUPPLEMENT FOR FEBRUARY 14, 1989 SL - PS4279 - PSP FOR FRONT GEAR TRAIN WEAR ON CERTAIN 3508 ENGINES (50 HZ PRI ME POWER GENERATOR SET) - MAILED US AND CANADA, CACO, COFA, CFEL, 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.
U-53 A-37 AU-35 E-29 O-39 Some information needs to be changed in the Service Letter which follows: February 14, 1989 - PS4279; Product Support Program For Front Gear Train Wear On Certain 3508 Engines (50 HZ Prime Power Generator Set) New gears are available for 3508 Engines (50 HZ Prime Power Generator Set). Parts stock of 7N5241 Gear Assembly - Idler, 7N5250 Gear Assembly - Oil Pump Drive, and 8N6645 Gear - Crankshaft should be exhausted on engines other than 3508 Engines (50 HZ Prime Power Generator Set). Under the heading Parts Needed, make the following changes to the parts required for After Failure - Rework A. Change 1 - 7N5241 Gear Assembly - Idler to 1 - 7E0274 Gear Assembly - Idler Change 1 - 7N5250 Gear Assembly - Oil Pump Drive to 1 - 7E0275 Gear Assembly Under the heading Parts Needed, make the following changes to the parts required for After Failure - Rework B. Change 1 - 8N6645 Gear - Crankshaft to 1 - 2W2895 Gear - Crankshaft Under the heading Parts Needed, make the following changes to the parts required for After Failure - Rework C. Change 1 - 8N6645 Gear - Crankshaft to 1 - 2W2895 Gear - Crankshaft Change 1 - 7N5241*** Gear Assembly - Idler to 1 - 7E0274*** Gear Assembly - Idler Change 1 - 7N5250*** Gear - Accessory (LH Upper) to 1 - 7E0275*** Gear Assembly