SB-49-12
Service Bulletin/Repair Instructions
WESTERN STAR: AROUND THE DIESEL EXHAUST FLUID (DEF) AN EXCESSIVE AMOUNT OF CRYSTAL OR POWDER BUILT UP INDICATES A LEAK CAUSED BY EVAPORATION OF DEF EXPOSED TO AIR AND/OR DAMPNESS. *PE
Vehicle report
1999 WESTERN STAR CONSTELLATION
Service bulletins
11 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
35-7
Service Bulletin/Repair Instructions
WESTERN STAR: LUBRICATE WHEEL BEARINGS, REAR DRIVE AXLES. *JS
SB-49-7
Service Bulletin/Repair Instructions
WESTERN STAR: EPA07 EXHAUST BELLOWS REPLACEMENT. IF A FAILED EXHAUST BELLOWS ON AN EPA07 ENGINE INSTALLATION, REPLACE IT WITH A NEW STYLE BELLOWS, AND TWO NEW MATCHING CLAMPS. NO MODEL YEARS LISTED. *PE UPDATED ON 6/14/2011. *KB UPDATED 4/20/12. *PE
SB-32-13
Service Bulletin/Repair Instructions
WESTERN STAR TRUCKS: THE REAR SUSPENSION AIR-SPRING ASSEMBLY HAS BEEN REDESIGNED. *RM
SB-35-06
Service Bulletin/Repair Instructions
WESTERN STAR TRUCKS: INSTRUCTIONS TO REMOVE, INSPECT, AND RESEAL THE LOWER PINION COVER ON THE REAR AXLES. *RM
SB-35-07
Service Bulletin/Repair Instructions
WESTERN STAR TRUCKS: INFORMATION ON WHEEL BEARING LUBRICATION IN THE REAR AXLE. *RM
SB-46-9
Service Bulletin/Repair Instructions
WESTERN STAR TRUCKS: THE PROCEDURE TO REPLACE THE POWER STEERING PUMP WITH A DIFFERENT VERSION PUMP. *RM
SB-49-8
Service Bulletin/Repair Instructions
WESTERN STAR TRUCKS: THERE ARE NEW CGI BELLOWS DUE TO CURRENT ONES THAT ARE PRONE TO FAILURE. *RM
SB-46-8
Service Bulletin/Repair Instructions
WESTERN STAR: TRW TAS85 STEERING GEAR INTERNAL LEAKAGE TEST. SOME TRW TAS85 STEERING GEARS HAVE BEEN EQUIPPED WITH AN INTERNAL RELIEF VALVE. THESE STEERING GEARS ARE TYPICALLY INSTALLED WITH POWER STEERING PUMPS THAT HAVE A PRESSURE RELIEF RATING GREATER THAN 2175 PSI (150 BAR). THE INTERNAL RELIEF VALVE LIMITS MAXIMUM SUPPLY PRESSURE TO PROTECT THE STEERING GEAR. NO MODEL YEARS LISTED. *PE
SB-31-7
Service Bulletin/Repair Instructions
WESTERN STAR TRUCK: 5 PIECE BACK OF CAB SERVICE CROSSMEMBER. 5 PIECE BOLTED SERVICE CROSSMEMBERS ARE AN IMPROVED, MORE DURABLE SERVICE REPLACEMENT FOR THE TUBULAR BACK OF CAB CROSSMEMBERS. FOLLOW STEPS TO REPLACE A TUBULAR BACK OF CAB CROSSMEMBER, WITH A 5 PIECE SERVICE CROSSMEMBER. *PE
SB-32-10
Service Bulletin/Repair Instructions
WESTERN STAR: SOME BARKSDALE HEIGHT CONTROL VALVES HAVE BEEN RETURNED FOR WARRANTY BECAUSE FOUR BOLTS IN THE VALVE HOUSING WERE OVERTIGHTENED, OFTEN, ENOUGH TO CRACK VALVE HOUSING. MODEL YEARS UNKNOWN. *PE
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.