Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 526 bulletins for WESTERN STAR
TechTalk23864
Apr 26, 2021
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on a belt stretch tool sent to service techs.
SS700-WST2021
Apr 23, 2021
060000 ENGINE AND ENGINE COOLING
Service Solution for 49X Vertical Exhaust Loose.
TechTalk12369K
Apr 1, 2021
110000 ELECTRICAL SYSTEM
Tech Talk continuing discussion on a burned cab.
TechTalk12347K
Mar 24, 2021
110000 ELECTRICAL SYSTEM
Tech Talk discussion on dash lights not working
TechTalk12331K
Mar 23, 2021
110000 ELECTRICAL SYSTEM
Tech Talk discussion on dash lights not working.
TechTalk12312K
Mar 18, 2021
180000 VEHICLE SPEED CONTROL
Tech Talk discussion on suspended accelerator pedal being uncomfortable for ice road operation.
SBW54-078
Feb 25, 2021
110000 ELECTRICAL SYSTEM
Western Star Service Bulletin for Programming Chassis Electronic Control Units (ECUs) With DiagnosticLink.
TechTalk8157K
Feb 23, 2021
060000 ENGINE AND ENGINE COOLING
Tech Talk continuing discussion on if HAS ANYONE ELSE SEEN HEAD GASKETS LEAKING.
TechTalk8157
Feb 22, 2021
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on HEAD GASKETS LEAKING OIL ON DD16 AT HEAD GASKET TO BLOCK.
TechTalk8161
Feb 19, 2021
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on DD15 HARD TO START UNLESS PLUGGED IN.
WP60-100
Feb 12, 2021
350000 EQUIPMENT
Updated Western Star Parts Technical Bulletin for Universal Design Floor Mats. This bulletin replaces the version dated February 12, 2021. Information about parts notes in the Paragon system have been added and the trimming instructions are
TechTalk8106
Feb 4, 2021
120000 EXTERIOR LIGHTING
Tech Talk discussion on 2020 Western Star 4800 signal lights dim to start.
CALWS91-001
Feb 2, 2021
220000 SEATS
Customer Advisory Letter for Western Star 49X Seat Mismatch. Certain Western Star 49X vehicles equipped with driver and passenger seats that may not match in color, material, or pattern.
TechTalk8061
Jan 21, 2021
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on GHG14 Regen acting unusual.
TechTalk8044
Jan 15, 2021
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on Western Star No Start.
TechTalk6504
Jan 12, 2021
110000 ELECTRICAL SYSTEM
Tech Talk continued discussion on code spn 523525 fmi 14.
CALShackle
Jan 8, 2021
010000 STEERING
Customer Advisory Letter for Threaded Pin and Bushing. Western Star Trucks built in 2020 with threaded pins and bushings have been found with loose shackles on the rear of the steering axle suspension. The pins are seizing from lack of lube
SBW42-014
Dec 17, 2020
030000 BRAKES (PWS)
Western Star Service Bulletin for Access to Front Brake Zerk Fittings. Certain vehicles with Detroit front axles and Meritor EX-L front air disc brakes do not have access to the front brake zerk fittings for lubrication.
SBW35-018
Dec 17, 2020
100000 POWER TRAIN
Western Star Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-1441
Techtalk7931
Dec 10, 2020
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on Injector #2 response time long.
Techtalk7921
Dec 9, 2020
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on Fan Override Switch Install.
CALWS54-003
Dec 7, 2020
110000 ELECTRICAL SYSTEM
Western Star Customer Advisory Letter for WST 49X Video Capture Decision Unit Fuse.