Remove/install electrohydraulic controller unit (transmission installed)

AR27.19-D-0200TSR

Remove/install electrohydraulic controller unit (transmission installed)

06.03.2020

Transmission

722.9 in model 907

1

Electrohydraulic controller unit

5

Oil filter

8

Detent plate

2

Electrical connector

6

Oil pan

9

Bolts

3

Transmission housing

7

Selector valve

10

O-rings

4

Oil guide pipe

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 Caution

Risk of injury to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil

Wear protective gloves, protective clothing and safety glasses.
Do not pour transmission oil into beverage bottles.

AS00.40-Z-0001-01A

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Notes on automatic transmission

AH27.19-P-0001-01NKB

 

Remove/install

1

Connect vehicle diagnosis system and transfer data from electrohydraulic controller unit (1) to vehicle diagnosis system.

If electrohydraulic controller unit (1) is replaced.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

2

Switch off ignition and remove transmitter key.

3

Disconnect electrical connector from automatic transmission.

AR27.19-D-0750-02TS

4

Remove oil pan (6) from automatic transmission.

AR27.10-D-7031TSR

5

Remove oil filter (5).

 To do so, detach oil filter (5) downwards. The oil filter (5) is replaced.

6

Remove electrohydraulic controller unit (1).


If electrohydraulic controller unit (1) is jammed, carefully pry it off with sealing surfaces covered up.
Otherwise, the sealing surfaces on the transmission housing (3) may be damaged.

 To do this, remove bolts (9) .

If the electrohydraulic controller unit (1) is jammed,



use suitable tool to pry electrohydraulic controller unit (1) off transmission housing (3).



Install

7

Install electrohydraulic controller unit (1).

AR27.19-D-0200-01TSR

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A


The selector valve (7) of the electrohydraulic controller unit (1) must latch into the detent plate's driver (8).
Otherwise, the selector lever positions of the intelligent servo module may not be transferred to the automatic transmission.

 Replace O-rings (10), bolts (9) and plain coupler (4).
Insert plain coupler (4) before installation of electrohydraulic controller unit (1) into transmission housing (3).

 Screw/bolt, electrohydraulic controller unit to transmission housing

*BA27.19-N-1001-01D

8

Install new oil filter (5).

9

Install oil pan (6).

AR27.10-D-7031TSR

 Do not add transmission oil yet and do not check oil level yet.



Clean

10

Clean electrical coupling (2).

Assembly cleaner

*BR00.45-Z-1028-04A

11

Connect electrical connector to automatic transmission.

AR27.19-D-0750-02TS

 Bolt, heat shield to transmission housing

*BA27.40-N-1007-01I

12

Read out fault memory using vehicle diagnosis system.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

 Clear existing errors.

13

Perform transmission adaptation using vehicle diagnosis system.

If electrohydraulic controller unit (1) was replaced or repaired.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

14

Transfer stored data from vehicle diagnosis system into new electric controller unit (1).

If electrohydraulic controller unit (1) was replaced.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

15

Add transmission oil to automatic transmission.

AR27.00-D-0270TSR

 The function and leak tightness of the automatic transmission are checked here. To expel any air pockets from the electrohydraulic controller unit (1), shift through the automatic transmission several times before commissioning.

 Electrohydraulic controller unit

Number

Designation

Transmission 722.9

BA27.19-N-1001-01D

Screw/bolt, electrohydraulic controller unit to transmission housing

Stage 1

Nm

4

Stage 2

°

90

 Housing

Number

Designation

Transmission 722.9

BA27.40-N-1007-01I

Bolt, heat shield to transmission housing

Nm

9

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01