Remove/install electrohydraulic controller unit (transmission installed)

AR27.19-S-0200PS

Remove/install electrohydraulic controller unit (transmission installed)

06.03.2020

Transmission

722.9 in model 470, 471 with engine 642

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

 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

General information on repair work on transmission

AH27.00-S-1000-01PS

Topical note

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

AH00.00-P-0020-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A



Remove

1

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

2

Disconnect electrical connector from automatic transmission.

AR27.19-S-0750-02PS

3

Remove oil pan (6).

AR27.10-S-7031PS

4

Remove oil filter (5).

5

Unscrew screws/bolts (9).

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.

If the electrohydraulic controller unit (1) is jammed,



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

7

Remove O-rings (10).

 Assembly tool

*000589936300



Install

8

Install new plain coupler (4) into transmission housing (3).

9

Install new O-rings (10).

 Assembly tool

*000589936300

10

Insert electrohydraulic controller unit (1).

AR27.19-S-0200-01PS

11

Screw in new bolts (9).

 Screw/bolt, electrohydraulic controller unit to transmission housing

*BA27.19-N-1001-01D

12

Install new oil filter (5).

13

Install oil pan (6).

AR27.10-S-7031PS

 Do not yet add any transmission oil.

14

Connect electrical connector to automatic transmission.

AR27.19-S-0750-02PS

 Bolt, heat shield to transmission housing

*BA27.40-N-1007-01I

Assembly cleaner

*BR00.45-Z-1028-04A

15

Read out fault memory.



AD00.00-S-2000-06P

 Clear existing errors.

16

Carry out transmission adaptation.

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



AD00.00-S-2000-06P

17

Fill automatic transmission with transmission oil.

AR27.00-S-0270PS

 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