Disassemble and assemble electrohydraulic controller unit

AR27.19-S-0220EA

Disassemble and assemble electrohydraulic controller unit

20.07.2020

Transmission

725.0 in model 447, 448

1

Screw

2

Screw

3

Screw

4

Screw

5

Screw

6

Screw

7

Screw

8

Screw

9

Screw

10

Screw

11

Screw

12

Screw

13

Screw

14

Screw

15

Fully integrated transmission control

16

Shift valve housing cover

16

Shift valve housing cover

17

O-ring

 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

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

Connect vehicle diagnosis system and begin commissioning of fully integrated transmission control (15).

If fully integrated transmission control (15) is replaced.



AD00.00-S-2000-04E

2

Remove electrohydraulic controller unit.

AR27.19-S-0200EA



Disassemble

3

Remove screws (1 to 14) in descending numerical order.

4

Remove fully integrated transmission control (15) from shift valve housing cap (16).

5

Remove O-ring (17).

 Assembly tool

*000589936300



Assemble

6

Moisten new O-ring (17) with transmission oil.



Automatic transmission fluids (ATF) (specification 236.17)

BB00.40-P-0236-17A

7

Install new O-ring (17).

 Assembly tool

*000589936300

8

Position fully integrated transmission control (15) on shift valve housing cap (16).

9

Tighten new screws (1 to 14) lightly by hand.

10

Tighten new screws (1 to 14) in ascending numerical order.

 Screw/bolt, electrical connection for auxiliary oil pump to control unit

*BA27.19-N-1004-01EA

 Screw/bolt, control unit to shift valve body cover

*BA27.19-N-1005-01EA



Assemble

11

Install electrohydraulic controller unit.

AR27.19-S-0200EA

12

Complete commissioning of fully integrated transmission control (15).

If fully integrated transmission control (15) was replaced.

 Electrohydraulic controller unit

Number

Designation

Transmission 725.0 in model 447, 448

BA27.19-N-1004-01EA

Screw/bolt, electrical connection for auxiliary oil pump to control unit

Nm

5

 Electrohydraulic controller unit

Number

Designation

Transmission 725.0 in model 447, 448

BA27.19-N-1005-01EA

Screw/bolt, control unit to shift valve body cover

Nm

4