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
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Showing 526 bulletins for WESTERN STAR

SBW26-005 Nov 30, 2020
WESTERN STAR — 5700 (2013–2020) — 9 vehicle combinations
100000 POWER TRAIN
Revised Western Star Service Bulletin forDT12 PTO Upfit. This bulletin replaces the version dated 09/23/2019. DDCSN and Power Service Literature references have been removed.
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TechTalk7901 Nov 18, 2020
WESTERN STAR — 4900 (2021) — 2 vehicle combinations
114000 ELECTRICAL SYSTEM:WIRING
Tech Talk discussion on Delayed Wiper Response.
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TechTalk2209 Nov 13, 2020
WESTERN STAR — 4700 (2021)
010000 STEERING
Tech Talk discussion on TRW GEAR-STRG,THP60,1200RAD,AB,ST. Steering exhibits shutter when turning left.
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TechTalk7853 Nov 5, 2020
WESTERN STAR — 4900 (2019) — 2 vehicle combinations
100000 POWER TRAIN
Tech Talk discussion on GHG17 WST 4900 Neutral Switch Not Valid.
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TechTalk7838 Oct 29, 2020
WESTERN STAR — 4700 (2013) — 2 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk discussion on W/S SIGNAL LIGHT OUT WITH CAB HEATER ON.
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SBW54-057 Oct 27, 2020
WESTERN STAR — 4700, 4800, 4900, 49X, 5700, 6900 (2010–2022) — 126 vehicle combinations
110000 ELECTRICAL SYSTEM
Western Star Service Bulletin for Powernet Troubleshooting Guide - Batteries, Path, Alternator, and Starter. When troubleshooting powernet issues, use the BCT-460DTNA PowerNet Assessment Tool. As of May 29, 2018, the AutoMeter is the only D
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TechTalk7821 Oct 22, 2020
WESTERN STAR — 4900 (2019) — 2 vehicle combinations
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on failed engine mounts.
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SBW54-077 Oct 14, 2020
WESTERN STAR — 4700, 5700 (2020–2021) — 4 vehicle combinations
110000 ELECTRICAL SYSTEM
Western Star Service Bulletin for Ordering Options for Aftermarket Power Distribution Modules (PDMs). For certain Western Star 4700 or 5700 vehicles, power distribution modules (PDMs) are typically ordered in the aftermarket by serial numbe
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WSTCAE180-2020 Oct 13, 2020
WESTERN STAR — 4700, 4800, 4900, 6900 (2010–2021) — 102 vehicle combinations
350000 EQUIPMENT
Portland Truck Plant Paint Changes
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SS1034783REV Oct 13, 2020
WESTERN STAR — 4700, 4900 (2019–2021) — 6 vehicle combinations
020000 SUSPENSION
Revised Service Solution for 20K Detroit Axle King Pin Lube Access. Western Star trucks equipped with 20k Detroit front axles and disc brakes built up to 8/17/2020 do not have sufficient room to access the king pin grease zerk.
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TechTalk7417 Oct 9, 2020
WESTERN STAR — 5700 (2019)
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on Repeat engine smoothness control codes 5362/16.
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TechTalk7766 Oct 9, 2020
WESTERN STAR — 5700 (2019) — 2 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk discussion on Western Star wipers. Wipers won't turn off.
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TechTalk7318 Oct 8, 2020
WESTERN STAR — 4900 (2020)
070000 FUEL SYSTEM, GASOLINE
Tech Talk discussion on Fault Code 96/13 Fuel Tank Level Sensor stuck in position.
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TechTalk7774 Oct 8, 2020
WESTERN STAR — 4700, 4800, 4900, 5700, 6900 (2019–2021) — 45 vehicle combinations
130000 VISIBILITY
Tech Talk discussion on SS 1034711 HADLEY MIRROR
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SBW54-076 Oct 7, 2020
WESTERN STAR — 4700, 4800, 4900, 5700, 6900 (2021) — 10 vehicle combinations
110000 ELECTRICAL SYSTEM
Western Star Service Bulletin for Connecting the Chassis Harness Connector to the Cab Front Wall 104-Way Pass-Through Connector. This bulletin describes how the chassis harness connector functions and how to verify the four locks of the ter
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TechTalk7730 Oct 6, 2020
WESTERN STAR — 5700 (2021) — 2 vehicle combinations
200000 WHEELS
Tech Talk discussion on DIFF LOCK SPEED LIMIT.
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TechTalk7742 Oct 5, 2020
WESTERN STAR — 4900 (2020) — 5 vehicle combinations
010000 STEERING
Tech Talk discussion on loose rear spring shackle bushings in the springs causing steer axle to shift on pins,
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TechTalk3593 Oct 2, 2020
WESTERN STAR — 5700 (2017)
110000 ELECTRICAL SYSTEM
Tech Talk discussion on 2017 Western Star 5700EX - Blown F19 Fuse - Loss of Dash Lights.
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TechTalk7719 Sep 27, 2020
WESTERN STAR — 4900 (2010) — 4 vehicle combinations
060000 ENGINE AND ENGINE COOLING
Tech Talk continuing discussion on 625 FMI 14.
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TechTalk2736 Sep 21, 2020
WESTERN STAR — 5700 (2016–2017) — 4 vehicle combinations
070000 FUEL SYSTEM, GASOLINE
Tech Talk discussion about fuel economy with ICU4Me
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TechTalk7698 Sep 18, 2020
WESTERN STAR — 4800, 4900 (2020) — 4 vehicle combinations
030000 SERVICE BRAKES, HYDRAULIC
Tech Talk discussion on dim brake lights on 2020 western star.
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TechTalk6001 Sep 16, 2020
WESTERN STAR — 5700 (2016) — 2 vehicle combinations
030000 BRAKES (PWS)
Tech Talk discussion for 1 DT12 COUNTERSHAFT BRAKE
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TechTalk7169 Sep 11, 2020
WESTERN STAR — 5700 (2020) — 2 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk discussion on blue tooth volume drop out on Western Star. Service Bulletin 54-074 was released on this issue.
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TechTalk7270 Sep 3, 2020
WESTERN STAR — 4800 (2008) — 2 vehicle combinations
060000 ENGINE AND ENGINE COOLING
Tech Talk discussion on 60 Series surge during regen.
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TechTalk3253 Sep 1, 2020
WESTERN STAR — 5700 (2015–2021) — 16 vehicle combinations
110000 ELECTRICAL SYSTEM
Tech Talk continuing discussion on Western Star 5700 Fault code 2049-9 and 527-9.
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