KIT-SEAL 3386597 - Caterpillar

Caterpillar: Confidential Yellow
SERVICE LETTER SUPPLEMENT FOR NOVEMBER 4, 1988 (REVISED 01/89) SL - PS4257 - PSP FOR EXHAUST PIPES, AND EXHAUST PIPE SUPPORTS ON CERTAIN D11N TRACTORS, 3508 ENGINES - MAILED US AND CANADA, COFA, COSA, LIMITED CACO
  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-63 A-44.2 AU-41 O-47 Some information needs to be changed in the Service Letter which follows: November 4, 1988 (Revised January 1989) - PS4257; Product Support Program For Exhaust Pipes, And Exhaust Pipe Supports On Certain D11N Tractors And 3508 Engines Under the heading Parts Needed, change the 7C3283 Manifold to a 7E1627 Manifold in both the parts list and in the second note.