Technical Service Bulletins

Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.

172,063 Unique Bulletins
4,686,952 Total Records
879 Vehicle Makes
1955–2025 Year Range
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Showing 526 bulletins for WESTERN STAR

TechTalk23864 Apr 26, 2021
WESTERN STAR — 4700 (2021) — 2 vehicle combinations
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on a belt stretch tool sent to service techs.
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SS700-WST2021 Apr 23, 2021
WESTERN STAR — 49X (2021)
060000 ENGINE AND ENGINE COOLING
Service Solution for 49X Vertical Exhaust Loose.
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TechTalk12369K Apr 1, 2021
WESTERN STAR — 4800, 4900 (2018) — 3 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk continuing discussion on a burned cab.
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TechTalk12347K Mar 24, 2021
WESTERN STAR — 4700 (2020) — 2 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk discussion on dash lights not working
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TechTalk12331K Mar 23, 2021
WESTERN STAR — 4700 (2020)
110000 ELECTRICAL SYSTEM
Tech Talk discussion on dash lights not working.
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TechTalk12312K Mar 18, 2021
WESTERN STAR — 4900 (2021)
180000 VEHICLE SPEED CONTROL
Tech Talk discussion on suspended accelerator pedal being uncomfortable for ice road operation.
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SBW54-078 Feb 25, 2021
WESTERN STAR — 49X (2021) — 2 vehicle combinations
110000 ELECTRICAL SYSTEM
Western Star Service Bulletin for Programming Chassis Electronic Control Units (ECUs) With DiagnosticLink.
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TechTalk8157K Feb 23, 2021
WESTERN STAR — 5700 (2018)
060000 ENGINE AND ENGINE COOLING
Tech Talk continuing discussion on if HAS ANYONE ELSE SEEN HEAD GASKETS LEAKING.
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TechTalk1967K Feb 22, 2021
WESTERN STAR — 49X (2021) — 2 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk discussion on Circuit Load tester.
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TechTalk8157 Feb 22, 2021
WESTERN STAR — 5700 (2018)
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on HEAD GASKETS LEAKING OIL ON DD16 AT HEAD GASKET TO BLOCK.
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TechTalk8161 Feb 19, 2021
WESTERN STAR — 4900 (2011) — 2 vehicle combinations
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on DD15 HARD TO START UNLESS PLUGGED IN.
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WP60-100 Feb 12, 2021
WESTERN STAR — 4700, 4800, 4900, 49X, 5700, 6900 (2010–2022) — 92 vehicle combinations
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
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TechTalk8097 Feb 6, 2021
WESTERN STAR — 4700 (2021) — 2 vehicle combinations
100000 POWER TRAIN
Tech Talk discussion on western star PTO.
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TechTalk8106 Feb 4, 2021
WESTERN STAR — 4800 (2020)
120000 EXTERIOR LIGHTING
Tech Talk discussion on 2020 Western Star 4800 signal lights dim to start.
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CALWS91-001 Feb 2, 2021
WESTERN STAR — 49X (2021) — 2 vehicle combinations
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.
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TechTalk8061 Jan 21, 2021
WESTERN STAR — 4900 (2015)
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on GHG14 Regen acting unusual.
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TechTalk8044 Jan 15, 2021
WESTERN STAR — 4900 (2021) — 2 vehicle combinations
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on Western Star No Start.
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TechTalk7777 Jan 14, 2021
WESTERN STAR — 4700 (2021)
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on tool push.
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TechTalk6504 Jan 12, 2021
WESTERN STAR — 4700, 49X (2019–2021) — 3 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk continued discussion on code spn 523525 fmi 14.
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CALShackle Jan 8, 2021
WESTERN STAR — 4700 (2020) — 4 vehicle combinations
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
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SBW42-014 Dec 17, 2020
WESTERN STAR — 4700, 4800, 4900, 49X, 5700 (2019–2021) — 39 vehicle combinations
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.
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SBW35-018 Dec 17, 2020
WESTERN STAR — 4700, 4800, 4900, 49X, 5700, 6900 (2002–2021) — 86 vehicle combinations
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
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Techtalk7931 Dec 10, 2020
WESTERN STAR — 4900 (2006)
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on Injector #2 response time long.
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Techtalk7921 Dec 9, 2020
WESTERN STAR — 5700 (2020)
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on Fan Override Switch Install.
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CALWS54-003 Dec 7, 2020
WESTERN STAR — 49X (2021) — 2 vehicle combinations
110000 ELECTRICAL SYSTEM
Western Star Customer Advisory Letter for WST 49X Video Capture Decision Unit Fuse.
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