# Service bulletin 870 Brake Chamber/763\-2

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: 11014494
- Published by NHTSA: 2025\-02\-25
- Manufacturer's number: 870 Brake Chamber/763\-2
- Manufacturer's date: 2014\-05\-01
- NHTSA component: SERVICE BRAKES

## NHTSA's summary

This bulletin has been issued to inform customers of the availability of an actuator by\-pass breather kit for Wabco Spring Brake Chambers. Part Numbers 441331 \& 440675. These chambers were used on chassis number 1829 onwards and also buses originally fitted with MGM actuators but converted as per Service Bulletin 763\-2.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2014/MC-11014494-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2014/MC-11014494-9999.pdf)

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

## Components

Brakes

## Vehicles listed

- 2009 to 2014 ALEXANDER DENNIS ENVIRO 500

JSON: [/v1/bulletins/11014494](/v1/bulletins/11014494)

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