ELBOW 8N2282 - Caterpillar

Caterpillar: Confidential Yellow
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.
This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS8748" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
This Revised Service Letter replaces the July 31, 1996 (Revised July 1997) Service Letter. Changes have been made to the Termination Date.
Termination Date
December 31, 1998Problem
Certain 3406E Engines rated at 410 HP and below needs the fuel hose routed so that the fuel enters the front of the cylinder head instead of the rear of the cylinder head and also flash the Electronic Control Module (ECM) with updated software to improve reliability and durability.
Affected Product
Model & Identification Number
3406E (5EK1-80006)
Parts Needed
Order The Flash Software According to the Horse Power Rating and Serial Number. Multitorque (MT) and Brakesaver (BS) Engines have separate software as indicated below.
Serial Numbers 5EK26875-80006
2 - 7K4129 Union2 - 6N4461 Hose Assembly*1 - 0680009 Coupling*1 - 9X2373 16 inches Hose*1 - 0016268 Coupling1 - 0016286 CouplingSerial Numbers 5EK1-26874 Only
1 - 6N4461 Hose Assembly*1 - 0680009 Coupling*1 - 9X2373 16 inches Hose*1 - 0016286 Coupling1 - 7K4129 Union1 - 9X2373 Hose (51 inches)1 - 0307937 Connector1 - 0336042 Seal-O-Ring2 - 0672551 Clamp (Navistar Chassis needs 1 additional Clamp)1 - 0680599 Coupling1 - 0016286 Coupling* Dealers may choose to assemble the hose assembly with parts listed.
If Flash Programming fails at 20% to 25% completion, replace the personality module with a 1069184 Module.
Action Required
See the attached rework procedure.
Service Claim Allowances
Labor Breakdown By Cab Type Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
This service letter is for routing fuel lines and flashing the software. However, since it has been determined that flashing to improve reliability and durability, this service letter is allowing, with the approval of the Caterpillar Service Representative, the flashing to be completed prior to installing the hoses on fleets (5 or more units).
For fleets (5 or More units), contact your Caterpillar Service Representative for authorization. The representative will give instructions as to the best time to complete the flashing, how to claim and if travel and overtime can be paid.
Check SIMS before flashing the ECM to verify that the ECM has not been flashed previously. The service letter can be claimed once for flashing the ECM and once for routing hoses if the flashing is completed at a time different than the hose routing.
For Engines with serial numbers 5EK1-268742 that have either the 1034666 or 1142557 Tube Assembly