# Service bulletin TechTalk566647

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: 10194818
- Published by NHTSA: 2021\-06\-02
- Manufacturer's number: TechTalk566647
- Manufacturer's date: 2021\-05\-03
- NHTSA component: SERVICE BRAKES, AIR

## NHTSA's summary

Tech Talk Discussion 121\-8861\-005 3 Compartment air tank with one way internal check valve

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194818-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10194818-9999.pdf)

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

## Components

Brakes

## Vehicles listed

- 2018 WESTERN STAR 4800
- 2018 WESTERN STAR 4900

## Recalls for the same vehicles and component

- [2019237](/recalls/tc/2019237.md), 2019-05-17: Brakes
- [18V703000](/recalls/nhtsa/18V703000.md), 2018-10-05: SERVICE BRAKES, AIR:DISC:CALIPER
- [2018285](/recalls/tc/2018285.md), 2018-05-30: Brakes
- [2018283](/recalls/tc/2018283.md), 2018-05-29: Brakes
- [18V353000](/recalls/nhtsa/18V353000.md), 2018-05-29: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER
- [18V351000](/recalls/nhtsa/18V351000.md), 2018-05-29: SERVICE BRAKES, AIR
- [2017583](/recalls/tc/2017583.md), 2017-11-28: Brakes
- [2017130](/recalls/tc/2017130.md), 2017-03-10: Brakes
- [17V124000](/recalls/nhtsa/17V124000.md), 2017-02-27: SERVICE BRAKES, AIR

## Other bulletins for the same vehicles and component

- [WSTCAE165\-2018](/bulletins/10193753.md), 2021-05-18, Service bulletin: SERVICE BRAKES, AIR:SPIDER; SERVICE BRAKES, HYDRAULIC. Certain Stamped Spider Drum Brakes Replaced by Cast Spider Drum Brakes on Steer Axles
- [sbw54065](/bulletins/10189108.md), 2021-03-15, Service bulletin: SERVICE BRAKES, HYDRAULIC. sbw54065 GHG17 Heavy Duty Engine Platform Vehicle Dash Oil Pressure Guage
- [TS1033768](/bulletins/10177689.md), 2020-07-31, Service bulletin: SERVICE BRAKES, HYDRAULIC. Training Solution for Western Star Front Brake Squeal \- Burnishing Procedure. The brake burnishing procedure can be used to help reduce brake related noise or imbalance concerns which may occur in the field.
- [FL773 Lowmax Bra](/bulletins/10158114.md), 2019-04-08, Service bulletin: SERVICE BRAKES. Recall Bulletin FL773 Lowmax Brake Hoses
- [FL773 Lowmax Bra](/bulletins/10156457.md), 2019-04-01, Service bulletin: SERVICE BRAKES, AIR:DISC. Recall Bulletin FL773 Lowmax Brake Hoses
- [18TL18](/bulletins/10154910.md), 2019-03-18, Service bulletin: SERVICE BRAKES. 30mm Air Disc Brake Caliper Bolt Torque Adapter DSNCHA018005
- [FL794](/bulletins/10154845.md), 2019-03-18, Service bulletin: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER. FL794 Brake Caliper Mounting Bolts Dealer Bulletin
- [FL794](/bulletins/10154497.md), 2019-03-11, Service bulletin: SERVICE BRAKES, AIR:DISC:CALIPER. Brake Caliper Mounting Bolts
- [ICI19\-003 FL794](/bulletins/10154445.md), 2019-03-11, Service bulletin: SERVICE BRAKES, AIR:DISC:CALIPER. FL794 \- Revised Bulletin Brake Caliper Mounting Bolts
- [FL794 REV](/bulletins/10154444.md), 2019-03-11, Service bulletin: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER. FL794 Recall Campaign\- Brake Caliper Mounting Bolts

JSON: [/v1/bulletins/10194818](/v1/bulletins/10194818)

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