# Service bulletin CAL\_WS\_42001

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: 10166808
- Published by NHTSA: 2019\-10\-30
- Manufacturer's number: CAL\_WS\_42001
- Manufacturer's date: 2019\-10\-29
- NHTSA component: SERVICE BRAKES, AIR; EQUIPMENT

## NHTSA's summary

Customer Advisory Letter for WABCO HP air dryer turbo cut\-off valve replacement.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10166808-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10166808-9999.pdf)

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

## Components

Brakes, Equipment and accessories

## Vehicles listed

- 2019 to 2020 WESTERN STAR 4700
- 2019 to 2020 WESTERN STAR 4800
- 2019 to 2020 WESTERN STAR 5700
- 2019 to 2020 WESTERN STAR 6900

## 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
- [20V211000](/recalls/nhtsa/20V211000.md), 2020-04-10: EQUIPMENT:OTHER:LABELS
- [2020086](/recalls/tc/2020086.md), 2020-03-03: Brakes
- [20V127000](/recalls/nhtsa/20V127000.md), 2020-03-03: SERVICE BRAKES, AIR:DISC:CALIPER
- [2019227](/recalls/tc/2019227.md), 2019-05-15: Brakes
- [19V367000](/recalls/nhtsa/19V367000.md), 2019-05-14: SERVICE BRAKES, AIR:DISC
- [2018550](/recalls/tc/2018550.md), 2018-10-09: Brakes
- [18V703000](/recalls/nhtsa/18V703000.md), 2018-10-05: SERVICE BRAKES, AIR:DISC:CALIPER
- [18V353000](/recalls/nhtsa/18V353000.md), 2018-05-29: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

## Other bulletins for the same vehicles and component

- [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
- [WSTCAE170\-2019](/bulletins/10193761.md), 2021-05-18, Service bulletin: EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER; VISIBILITY. New Valeo A/C Compressor
- [WI21\-008](/bulletins/10190549.md), 2021-04-23, Service bulletin: EQUIPMENT. Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times \(SRTs\) shown. The updated times will be applied to repair orders opened on or after April 5, 2021.
- [DT12 Trans Chafe](/bulletins/10190020.md), 2021-04-08, Service bulletin: EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN. DTNA received a field notification on multiple units regarding diagnostic fault codes that were found to be causing issues to the After Treatment Control Module \(ACM\). These fault codes indicated that the ACM communication message was not received by the Motor Control Module \(MCM\) which in certain cases, led to a 25% engine de\-rate situation. Further diagnosis revealed that the DT12 wiring harness was chafing and contacting the transmission TCU case. To reduce potential chafing areas, the proposed short\-term containment was to route the wiring harness using additional tie straps. This communication applies to Freightliner and Western Star vehicles built with DT12 transmissions.
- [WP60\-100](/bulletins/10189335.md), 2021-03-25, Service bulletin: 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 revised. Universal floor mat designs fit multiple cab configurations and may require trimming. Trim lines displaying size options are scored into the pad side of the mat; use an existing floor mat as a guide for optimal results. The new mat should not interfere with safety\-critical equipment, such as foot pedals.

JSON: [/v1/bulletins/10166808](/v1/bulletins/10166808)

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