Remove/install electrohydraulic controller unit (transmission installed)

AR27.19-S-0200EA

Remove/install electrohydraulic controller unit (transmission installed)

20.07.2020

Transmission

725.0 in model 447, 448

1

Electrohydraulic controller unit

3

Bolts

4

Transmission housing

2

Screw

1

Electrohydraulic controller unit

5

Contact springs

6

Oil guide pipe

7

Oil guide pipe

4

Transmission housing

8

Screw

9

Oil guide pipe

 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

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

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

AH00.00-P-0020-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

General information on repair work on transmission

AH27.00-S-1000-01PS

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A



Remove

1

Remove automatic transmission oil pan.

AR27.10-S-7031EA

2

Remove screw/bolt (2).

3

Unscrew bolts (3).

4

Remove electrohydraulic controller unit (1) in downward direction.


If electrohydraulic controller unit (1) is jammed, carefully pry it off with sealing surfaces covered up.
Otherwise the sealing surfaces on the transmission housing (4) will be damaged.

 Helper required.

5

Remove plain couplers (6, 7).

6

Remove screw/bolt (8).

7

Remove plain couplers (9) from transmission housing (4).



Install

8

Install new plain couplers (9) in transmission housing (4).

9

Tighten screw (8).

 Screw/bolt, oil guide pipe to transmission housing

*BA27.10-N-1013-06EA

10

Install new plain couplers (6, 7).

11

Insert electrohydraulic controller unit (1) carefully from below.


Do not damage contact springs (5) of selector lever lock.
Otherwise, malfunctions will occur with the selector lever lock.

 Helper required.

12

Tighten new screws (3).

 Bolt, electrohydraulic controller unit to transmission housing

*BA27.19-N-1001-01EA

 Screw/bolt, auxiliary oil pump to transmission housing

*BA27.19-N-1003-01EA

13

Tighten new screw (2).

 Screw/bolt, auxiliary oil pump to transmission housing

*BA27.19-N-1003-01EA

14

Install automatic transmission oil pan.

AR27.10-S-7031EA



Check

15

Read out and delete fault memory.



AD00.00-S-2000-04E

16

Carry out transmission adaptation.



AD00.00-S-2000-04E

 Automatic transmission complete

Number

Designation

Transmission 725.0 in model 447, 448

BA27.10-N-1013-06EA

Screw/bolt, oil guide pipe to transmission housing

Nm

4

 Electrohydraulic controller unit

Number

Designation

Transmission 725.0 in model 447, 448

BA27.19-N-1001-01EA

Bolt, electrohydraulic controller unit to transmission housing

Stage 1

Nm

4

Stage 2

°

90

 Electrohydraulic controller unit

Number

Designation

Transmission 725.0 in model 447, 448

BA27.19-N-1003-01EA

Screw/bolt, auxiliary oil pump to transmission housing

Stage 1

Nm

4

Stage 2

°

90