ar4231p6002aa

Remove/install BAS diaphragm travel sensor

Type ar · topic 42.31 · version 0103 · 2018-10-31

Applies to: Model 463.243/246/249/270/271/322/323, 463.244/245/247/248/250/254/309/332/333 as of 9/30/01 up to model year 2019

Where it sits

Function group 2 Chassis › 42 Brakes - hydraulic and mechanical systems › 42.31 Brake assist (BAS) — Series 463 (models 243, 244, 245, 246, 247, 248, 249, 250, 254, 270, 271, 309, 322, 323, 332, 333)

EinPAS 26 Active safety system › 26.20 Braking/traction control › 26.20.12 Sensor/switch/wiring harness — Series 463 (models 243, 244, 245, 246, 247, 248, 249, 250, 254, 270, 271, 309, 322, 323, 332, 333)

AR42.31-P-6002AA

Remove/install BAS diaphragm travel sensor

24.10.2018

Model

463.243/246/249/270/271/322/323, 463.244/245/247/248/250/254/309/332/333 as of 9/30/01

up to model year 2019

Remove/install BAS diaphragm travel sensor

14

Ground bolts

16b

Retaining ring

A7/7b1

BAS diaphragm travel sensor

A7/7x1

Diaphragm travel sensor connector

P42.31-2056-06

Remove/install

Topical note

Notes on brake servo

AH43.20-P-0001-01A

Operate brake pedal several times until vacuum in brake booster is reduced

Under vacuum, the diaphragm travel sensor sealing ring can be drawn into the brake booster.
In this case, the brake booster must be replaced.

Remove ground bolt (14) for jump-start connection point ground line

Disconnect diaphragm travel sensor connector (A7/7x1)

Remove retaining ring (16b) using suitable tool

Installation: Replace the retaining ring (16b) and make sure that the retaining ring (16b) is seated correctly.

Remove BAS diaphragm travel sensor (A7/7b1)

Installation: Moisten the BAS diaphragm travel sensor (A7/7b1) slightly at the front with spirit or with soapy water.

Remove O-ring remove from brake booster

Installation: Insert the O-ring into the groove of the brake booster and ensure correct seating.

Install in the reverse order

Check

Start engine and operate brake several times

Switch off the engine

Check leak tightness of diaphragm travel sensor (A7/7b1)

There must be no audible air flow noises at the brake booster.

Referenced documents