RADIATOR GP 1791690 - Caterpillar

Caterpillar: Confidential Yellow
SERVICE LETTER SUPPLEMENT FOR JUNE 20, 1990 SL - PSP FOR CYLINDER HEAD GASKET FAILURES ON CERTAIN (SEE PAPER COPY FOR APP LICABLE MODELS) - PS0453 - 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.
October 7, 1991 U-195 A-146 AU-127 E-132 O-150 SERVICE LETTER SUPPLEMENT Some information needs to be changed in the Service Letter which follows: June 20, 1990 (Revised March 1991) - PS0453; Product Support Program For Cylinder Head Gasket Failures On Certain D6D, D6H, D7G, And D7H Tractors; 12G, 14G, And 140G Motor Graders; D25C, D25D, D30C, D30D, D35C, D250B, D300B, D350C, And D350D Articulated Dump Trucks; Challenger 65 Tractors; 235C Excavators; 528 Skidders; 615C, 627E, And 637E Scrapers; 815B And 816B Compactors; 966D And 966E Loaders; And 973 Loaders Under the heading Affected Product, add the following product identification numbers for D6H Tractors. Model Identification Number D6H 1FJ1-476 2TG1-515 4LG1-864 5HF1-369 6CF1-584 Under the heading Affected Product, change the product identification numbers for 973 Loaders to read as follows. Model Identification Number 973 86G1-1031