ar4240p0816w

Remove/install ETS/ASR/ESP hydraulic unit

Type ar · topic 42.40 · version 0100 · 2011-03-02

Applies to: MODEL 172

Where it sits

Function group 2 Chassis › 42 Brakes - hydraulic and mechanical systems › 42.40 Traction regulation (ASR) — Series 172

EinPAS 26 Active safety system › 26.20 Braking/traction control › 26.20.35 Hydraulic unit — Series 172

AR42.40-P-0816W

Remove/install ETS/ASR/ESP hydraulic unit

17.2.11

MODEL 172

Remove/install ETS/ASR/ESP hydraulic unit

P42.40-2032-06

1 Bracket

2 Electrical connector

3 Brake lines

4 Bracket

5 Screw

A7/3 Traction system hydraulic unit

N30/4 Electronic Stability Program control unit

Remove/install

Danger!

Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes.

Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.

AS42.50-Z-0001-01A

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Brake fluid notes

AH42.50-P-0001-01A

Notes on repairs to brake system

AH42.00-P-0003-01A

1

Switch off ignition and remove transmitter key or KEYLESS-GO start/stop button from electronic ignition lock control unit

KEYLESS-GO start/stop button only on vehicles with code (889) Keyless-Go.

Clean

2

Clean traction system hydraulic unit (A7/3) at brake lines (3)

Cleaner from package

*BR00.45-Z-1028-04A

3

Disconnect electrical connector (2) from Electronic Stability Program control unit (N30/4)

It is essential to precisely follow the work instructions for disconnecting the electrical connector (2). The locking mechanism can otherwise be damaged.

AR42.45-P-0820-02CW

Do not touch, deform or damage the contacts of the electrical connector (2) and of the jack on the Electronic Stability Program control unit (N30/4). Do not allow foreign objects, dirt or fluids to enter the jack or electrical connector (2). The Electronic Stability Program control unit (N30/4) can otherwise be damaged or malfunction.

4

Unclip electrical line on bracket (1)

5

Mark brake lines (3) for corresponding connection

6

Detach brake lines (3) from traction system hydraulic unit (A7/3)

Seal the brake lines (3) and connections at the traction system hydraulic unit (A7/3). Foreign objects can otherwise enter the traction system hydraulic unit (A7/3) and cause damage.

Installation: Pay attention to stress/chafe-free routing of brake lines (3).

*BA42.10-P-1004-04L

Set of stop plugs

*129589009100

Box wrench bit

*000589750300

Plug-in joint adapter

*001589001600

Box wrench bit

*140589000300

7

Lift traction system hydraulic unit (A7/3) out of bracket (1)

Installation: Check the rubber grommets on the bracket (1) for damage and that they are seated correctly; install new ones if necessary.

8

Unscrew bolt (5) and remove bracket (4) from hydraulic unit traction system (A7/3)

When installing a new traction system hydraulic unit (A7/3).

*BA42.45-P-1001-01M

9

Install in the reverse order

10

Connect Star Diagnosis and perform calibration of Electronic Stability Program control unit (N30/4)

When installing a new traction system hydraulic unit (A7/3).

AD00.00-P-2000-04A

11

Bleed brake system

AR42.10-P-0010CW

Electronic Stability Program (ESP)

Number

Designation

Model
172

BA42.45-P-1001-01M

Bolt, traction system hydraulic unit to bracket

M8

Nm

18

M10

Nm

-

Brake lines, brake hoses

Number

Designation

Model
172

BA42.10-P-1004-04L

Union nut, brake line to hydraulic unit

Ø4.75

Nm

18

Ø6

Nm

18

Ø8

Nm

24

Remove/install ETS/ASR/ESP hydraulic unit
Remove/install ETS/ASR/ESP hydraulic unit
Remove/install ETS/ASR/ESP hydraulic unit
Remove/install ETS/ASR/ESP hydraulic unit

140 589 00 03 00

Set of stop plugs

Box wrench bit

Box wrench bit

Plug-in joint adapter

000 589 75 03 00

129 589 00 91 00

001 589 00 16 00

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Cleaner from package

Adolf Würth GmbH & Co. KG
Reinhold-Würth-Str. 12-17
74653 Künzelsau-Gaisbach
Germany
Tel. +49 7940 15-0
Fax +49 7940 15-1000
www.wuerth.de

Referenced documents