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Service Bulletins

Service Bulletins are product modifications or improvements, which may enhance the operation of the affected vehicle.

To view a Service Bulletin, select from the links to the right. To download a Service Bulletin, right-click on the link and select "Save Target As" from the menu.


ACX Windshield Wiper Re-Clocking Procedures
SB 8-628-001 (419 KB)

Charge Air Cooler (CAC) / Cab Contact
SB 8-202-001 (554 KB)

Brake and Accelerator Pedal Threaded Fasteners
SB 8-133-001 (585 KB)

Revised Universal Joint Yoke Nut Torque Specification:
SB 4-30B-001 (152 KB)

Revised Wire Terminal in Allison Transmission Wire Harness
SB 4-269-002 (384 KB)

Secondary Transmission Shift Controller
SB 4-269-001 (480 KB)

WX and WXLL Trucks Experiencing Fan Clutch Failures:
SB 4-208-001 (532 KB)

WX Trucks with 2005 Dashboard Experiencing Intermittent Transmission ECU Shutdown:
SB 3-873-002 (347 KB)

WX Trucks Where Tech Panel Spacer was Omitted During Installation
SB 3-873-001 (372 KB)

WX and WXLL Trucks Experiencing Intermittent Engine Shutdown and Other Engine Fault Codes:
SB 3-872-001 (628 KB)

WX/WXR and WXLL Trucks Equipped with 2-wire A/C Compressor Clutch Coils Installed on Engines with a Single Wire Connector on the Engine Harness:
SB 3-611-001 (677 KB)

WX Trucks with 2005 Dashboard Experiencing Problems with HVAC Actuator Motors:
SB 3-603-001 (988 KB)

WX/WXR Diagnostic Procedures for 2005 Dashboard Instrumentation:
SB 3-144-002 (167 KB)

Instructions for Replacing Dual Drive Crossover Relay
SB 3-133-001 (383 KB)

Aftermarket Engine Air Filter Elements
SB 2-220-001 (498 KB)

Charge Air Cooler Installation
SB 2-219-002 (611 KB)

WX/R, WXLL Trucks With Omitted Charge Air Cooler Expansion Slots
SB 2-219-001 (977 KB)

Assembly Instruction - Regen Switch
AI 3-129-001 (1.35 MB)