CORE AS-RADIATOR 3874378 - Caterpillar

Caterpillar: Confidential Yellow
SERVICE LETTER CANCELLATION FOR MAY 17, 1989 SL - PSP FOR TIMING ADVANCE RACE WEAR AND RETAINING RING LOSS ON CERTAIN 340 6B TRUCK ENGINES - PS4300 - MAILED US AND CANADA, CACO, COFA, 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.
U-32 A-25 AU-21 O-30.1 TT-2 The following Service Letter has been canceled. May 17, 1989 - PS4300; Product Support Program For Timing Advance Race Wear And Retaining Ring Loss On Certain 3406B Truck Engines