GASKET-CYLINDER HEAD 4256411 - Caterpillar

Off-Highway Truck:
793F (S/N: SSP1-UP)
Service Magazine SEPD1146, 05 July 2010, "Improved Bracket Assemblies Are Now Used In the Muffler Group and Exhaust Pipe Group on 793F Off-Highway Truck". Disregard this article. See the replacement article that follows.ReferenceSpecial Instruction, REHS5081, "Field Procedure to Update the Muffler Group and Exhaust Pipe Group on 793F Off-Highway Truck".Description of Change: The geometry of the bracket assemblies that are used in the muffler groups and exhaust pipe group is improved. Also, an additional bracket assembly is added to the 284-0656 Muffler Gp. The Improved bracket assemblies will provide improved service life. There is no change to the part numbers of the bracket assemblies as a result of this improvement.Adaptable To: The improved 311-4099 Bracket As, 311-4102 Bracket As, 319-5912 Bracket As and 319-5918 Bracket As are adaptable to the machines SSP1-157.The improved 311-4099 Bracket As, 311-4102 Bracket As, 319-5912 Bracket As and 319-5918 Bracket As are effective in production with the machine SSP158-UP.The 319-5912 Bracket As is a part of 284-0656 Muffler Gp .The 319-5918 Bracket As is a part of 284-0657 Muffler Gp .The 311-4099 Bracket As and 311-4102 Bracket As are a part of 290-8857 Exhaust Pipe Gp .Refer to the above reference for the rework procedure and the required parts list to update the 284-0656 Muffler Gp, 284-0657 Muffler Gp and 290-8857 Exhaust Pipe Gp .The Special Instruction is available through the normal literature distribution system. The publication can also be found on the Caterpillar Service Information System (SIS).