# Service bulletin CALShackle

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: 10185927
- Published by NHTSA: 2021\-01\-28
- Manufacturer's number: CALShackle
- Manufacturer's date: 2021\-01\-08
- NHTSA component: EQUIPMENT ADAPTIVE/MOBILITY; SUSPENSION; EQUIPMENT; STEERING

## NHTSA's summary

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 causing the shackle to rotate on the pin.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10185927-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10185927-9999.pdf)

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

## Components

Equipment and accessories, Steering, Suspension

## Vehicles listed

- 2020 WESTERN STAR 4700

## Recalls for the same vehicles and component

- [22V338000](/recalls/nhtsa/22V338000.md), 2022-05-16: EQUIPMENT:OTHER:LABELS
- [20V634000](/recalls/nhtsa/20V634000.md), 2020-10-14: EQUIPMENT:OTHER:LABELS; TIRES
- [20V539000](/recalls/nhtsa/20V539000.md), 2020-09-03: SUSPENSION:MULTIPLE AXLE
- [20V211000](/recalls/nhtsa/20V211000.md), 2020-04-10: EQUIPMENT:OTHER:LABELS
- [2019539](/recalls/tc/2019539.md), 2019-10-25: Steering
- [19V769000](/recalls/nhtsa/19V769000.md), 2019-10-25: STEERING

## 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
- [PB33\-005\-WST](/bulletins/11020274.md), 2025-07-08, Service bulletin: STEERING. Parts Bulletin for Tie Rod Assembly Part Breakdown
- [SS778\-WST](/bulletins/11013219.md), 2025-01-29, Other: STEERING. Service Solution for Power Steering Reservoir Fill Cap Venting
- [SS734\-WST](/bulletins/11000986.md), 2024-06-05, Other: SUSPENSION. Service Solution for Thread Spring Pin Suspension Alignment \& Installation
- [SBW54\-074](/bulletins/10207520.md), 2022-02-05, Service bulletin: EQUIPMENT. Revised Western Star Service Bulletin for Pana\-Pacific 540 Radio Controls Not Operating Normally. Minor note: added an update of document previously submitted. The related VMRS codes are added
- [WSTCAE180\-2020](/bulletins/10193771.md), 2021-05-18, Service bulletin: EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY. Portland Truck Plant Paint Changes
- [WSTCAE177\-2020](/bulletins/10193768.md), 2021-05-18, Service bulletin: EQUIPMENT; POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY. Meritor Transfer Case Updates
- [WSTCAE176\-2020](/bulletins/10193767.md), 2021-05-18, Service bulletin: TRAILER HITCHES; EQUIPMENT; STRUCTURE:FRAME AND MEMBERS. Removable Front Tow Hook Changes
- [WSTCAE172\-2020](/bulletins/10193763.md), 2021-05-18, Service bulletin: EQUIPMENT; VISIBILITY. Tractor Reflective Devices
- [WSTCAE171\-2019](/bulletins/10193762.md), 2021-05-18, Service bulletin: EQUIPMENT; FUEL SYSTEM, OTHER; POWER TRAIN. Allison FuelSense 2.0

JSON: [/v1/bulletins/10185927](/v1/bulletins/10185927)

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