# Service bulletin SS1034621

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.

- Type: Service bulletin
- NHTSA id: 10170323
- Published by NHTSA: 2020\-01\-21
- Manufacturer's number: SS1034621
- Manufacturer's date: 2020\-01\-20
- NHTSA component: SUSPENSION

## NHTSA's summary

Service Solution for Western Star vehicles equipped with Hendrickson AIRTEK Axles experiencing a Harsh Ride.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10170323-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10170323-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Suspension

## Vehicles listed

- 2004 to 2020 WESTERN STAR 4800
- 2004 to 2020 WESTERN STAR 4900
- 2004 to 2020 WESTERN STAR 5700

## Recalls for the same vehicles and component

- [20V539000](/recalls/nhtsa/20V539000.md), 2020-09-03: SUSPENSION:MULTIPLE AXLE
- [18V913000](/recalls/nhtsa/18V913000.md), 2018-12-19: SUSPENSION:FRONT:CONTROL ARM; STEERING:LINKAGES:TIE ROD ASSEMBLY; STEERING
- [2017407](/recalls/tc/2017407.md), 2017-08-24: Suspension
- [17V521000](/recalls/nhtsa/17V521000.md), 2017-08-24: SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY
- [12V266000](/recalls/nhtsa/12V266000.md), 2012-06-12: SUSPENSION:FRONT
- [2011407](/recalls/tc/2011407.md), 2011-11-17: Suspension
- [07V316000](/recalls/nhtsa/07V316000.md), 2007-07-24: SUSPENSION:REAR
- [2007230](/recalls/tc/2007230.md), 2007-07-11: Suspension
- [2006084](/recalls/tc/2006084.md), 2006-04-19: Suspension

## Other bulletins for the same vehicles and component

- [TSB\-32\-020\-WST](/bulletins/11030281.md), 2026-03-27, Service bulletin: SUSPENSION. Technical Service Bulletin for TufTrac M12 Bolts
- [SS734\-WST](/bulletins/11000986.md), 2024-06-05, Other: SUSPENSION. Service Solution for Thread Spring Pin Suspension Alignment \& Installation
- [TechTalk7742](/bulletins/10183399.md), 2020-12-04, Service bulletin: STEERING; SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:SHACKLE. Tech Talk discussion on loose rear spring shackle bushings in the springs causing steer axle to shift on pins. New comments added.
- [TechTalk7742](/bulletins/10181990.md), 2020-11-03, Service bulletin: EQUIPMENT; STEERING; SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY:SHACKLE. Tech Talk discussion on loose rear spring shackle bushings in the springs causing steer axle to shift on pins,
- [SS1034783REV](/bulletins/10181325.md), 2020-10-19, 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\-016](/bulletins/10177605.md), 2020-07-31, 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.
- [WP20\-001REV](/bulletins/10171359.md), 2020-02-15, Service bulletin: POWER TRAIN; LANE DEPARTURE; SUSPENSION; EQUIPMENT. Revision to a Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch. The One Stop Supplier Extended Program streamlines the claim filing process because with One Stop Supplier Extended, the service network will file claims for some supplier\-supported coverages in OWL. Revisions are in blue.
- [WP20\-001](/bulletins/10170299.md), 2020-01-21, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN; SUSPENSION; LANE DEPARTURE. Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch. The One Stop Supplier Extended Program streamlines the claim filing process because with One Stop Supplier Extended, the service network will file claims for some supplier\-supported extended coverages in OWL.
- [CAL WST 32\-002](/bulletins/10168628.md), 2019-12-02, 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\-002](/bulletins/10168094.md), 2019-11-21, 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.

JSON: [/v1/bulletins/10170323](/v1/bulletins/10170323)

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