Remove/install ETS/ASR/ESP(R) hydraulic unit

AR42.40-P-0816EQ

Remove/install ETS/ASR/ESP(R) hydraulic unit

06.03.2020

Model

293

1

Nuts

7

Hydraulic unit

2

Electrical connector

K40/8

Engine fuse and relay module

3

Brake lines

N30/8

Regenerative braking system control unit

4

Elastomer bearing

6

Screw

5

Bracket

7

Hydraulic unit

 Caution

Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid

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

Topical note

Notes on repairs to brake system

AH42.00-P-0003-01A

Topical note

Brake fluid notes

AH42.50-P-0001-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

 

Remove/install

1

Perform commissioning of regenerative brake system control unit (N308).

Only when replacing the hydraulic unit (7).



AD00.00-P-2000-06FR

 The regenerative brake system control unit (N30/8) is part of the hydraulic unit (7).

2

Switch off ignition and store transmitter key outside of transmission range (min. 2  m).

3

Remove cover over brake fluid reservoir.

4

Remove nuts (1) and place engine fuse and relay module (K40/8) with connected electric lines to one side.



Clean

5

Clean hydraulic unit (7) in area of brake line connections.


Before opening the hydraulic system, the area surrounding the connecting points should be thoroughly cleaned.
Otherwise minute particles of dirt in the hydraulic components can result in malfunctions and total failure of the hydraulic system.

 Only use clean, lint free rags and cleaner free of mineral oil. Do not use any compressed air for cleaning when the brake system is open.

Assembly cleaner

*BR00.45-Z-1028-04A

6

Release and disconnect electrical connector (2) from regenerative brake system control unit (N30/8).

AR42.45-P-0820-02EQ


It is essential to follow the work instructions for disconnecting the electrical connector (2).
Otherwise the locking mechanism may be damaged.


The contacts of the electrical connector (2) on the regenerative brake system control unit (N30/8) must not be touched, deformed or damaged, and foreign objects, soiling or fluids must not be allowed to penetrate into the electrical connector (2).
Otherwise, the regenerative brake system control unit (N30/8) may be damaged or may malfunction.

7

Mark brake lines (3) relative to the corresponding connection on the hydraulic unit (7).

8

Remove brake lines (3) from hydraulic unit (7) and seal connections with stop plugs.

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW


Seal brake lines (3) and connections on hydraulic unit (7).
Otherwise the hydraulic unit (7) may be damaged by the entry of foreign objects.

 Route the brake lines (3) such that they are free of tension and do not chafe against adjacent parts. Pay attention to marking.

 Retaining screw, brake line to hydraulic unit

*BA42.10-P-1004-04P

 Torque wrench

*001589872100

 Record plug

*129589009100

 Box wrench bit

*140589000300

 Adapter coupling

*001589001600

 Box wrench bit

*000589750300

9

Pull hydraulic unit (7) together with regenerative brake system control unit (N30/8) up and out of elastomer bearings (4).

 Installation: Make sure that the studs (arrows) of the bracket (5) are correctly seated in the elastomer bearings (4).

10

Remove screw (6) and take off holder (5).

Only when replacing the hydraulic unit (7).

 Screw/bolt, bracket to traction system hydraulic unit

*BA42.45-P-1001-01M

11

Install in the reverse order.

12

Bleed brake system.

AR42.10-P-0010LW

13

Read out and erase fault memory using the diagnostic system.



AD00.00-P-2000-06FR

 Brake lines, brake hoses

Number

Designation

Model 293

BA42.10-P-1004-04P

Retaining screw, brake line to hydraulic unit

Nm

16

 Electronic Stability Program (ESP®)

Number

Designation

Model 293

BA42.45-P-1001-01M

Screw/bolt, bracket to traction system hydraulic unit

M8

Nm

18

M10

Nm

-

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01