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Service bulletins for the 2019 Western Star 4900

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

292 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Suspension are shown. Show all

Bulletins, newest first
SS734-WST2024-06-05. Other. SUSPENSION. Service Solution for Thread Spring Pin Suspension Alignment & Installation
SS1034783REV2020-10-19. Service bulletin. 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.
SBW31-0162020-07-31. Service bulletin. SUSPENSION:REAR; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Western Star Bulletin for Non-Airliner Rear Suspension Crossmember Fastener Change. With the start of production on March 2, 2020, the fasteners used to assemble the non-Airliner rear suspension (bogie) crossmember have changed. The rear suspension bogie crossmember gussets to the C-channel will be assembled with 5/8–18 fasteners. This change includes a revision to a higher friction nut that requires an increase in tightening torque. The new higher friction nut can be identified by its green color.
SS10346212020-01-21. Service bulletin. SUSPENSION. Service Solution for Western Star vehicles equipped with Hendrickson AIRTEK Axles experiencing a Harsh Ride.
CAL WST 32-0022019-12-02. Service bulletin. EQUIPMENT; SUSPENSION; EQUIPMENT ADAPTIVE/MOBILITY. Customer Advisory Letter for Airliner welded axle seats. The welded axle seats were installed incorrectly on the rear most drive axle for specific vehicles resulting in an incorrect axle pinion angle. The existing welded axle seats will be removed and replaced with new axle seats installed in the correct orientation.
SBW41-0022019-11-21. Service bulletin. SUSPENSION; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Service Bulletin for midship bearing replacement. This procedure applies to all vehicles built with driveshafts SPL140, SPL170 or SPL250 with first order driveline vibration.
19TL-92019-08-08. Service bulletin. WHEELS; SUSPENSION; EQUIPMENT. DTNA Special Tools Group has approved the use of Haweka Axis4000 aftermarket alignment system for use on DTNA products at DTNA service locations. The Axis4000 system uses the reference points required by DTNA for precise, accurate, and repeatable measurements. Axis4000 is a sophisticated, user-friendly system that utilizes computer based camera-radio technology and references the center line of the frame for measuring and providing alignment results to DTNA specifications.
sbw00152019-04-08. Service bulletin. SUSPENSION. Service Bulletin Vibration and Harsh Ride Troubleshooting
DOC-10341712019-04-01. Service bulletin. SUSPENSION. SS 1034171 Airliner Rear Suspension Chassis Lean Troubleshooting
sbw0015 Vibratio2018-12-10. Service bulletin. SUSPENSION. Vibration and Harsh ride Troubleshooting
sbw310142018-12-10. Service bulletin. SUSPENSION. Airliner Rear Suspension Crossmember Fastener Change
sbw310142018-12-10. Service bulletin. SUSPENSION. sbw31014 Airliner Rear Suspension Crossmember Fastener Change
sbw310142018-10-29. Service bulletin. SUSPENSION; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. With the start of production on April 2, 2018, the fasteners used to assemble Airliner rear suspension crossmembers changed. The forward-suspnsion crossmember will assembled with 5/8-18 fasteners and the rear-suspension (bogie) crossmember will be assembled with 3/4-16 fasteners.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.