Remove/install clutch pack BR, multidisk brake B2 and park pawl gear

AR27.50-S-0782PS

Remove/install clutch pack BR, multidisk brake B2 and park pawl gear

20.12.2018

Transmission

722.9 in model 470, 471 with engine 642

Modification notes

19.12.2018

Specifications for Operating Fluids for transmission fluid changed

Operation step 12

1

Transmission housing

5t

Disk spring

7

Park pawl gear

5

Clutch pack BR

6

B2 multidisk brake

5s

Retaining ring

6s

Screw

 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 threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

General information on repair work on transmission

AH27.00-S-1000-01PS



Remove

1

Remove transmission housing (1) from torque converter housing.

AR27.40-S-0003PS

2

Press clutch pack BR (5) together.

3

Remove retaining ring (5s).

 Pliers

*000589523700

4

Remove clutch pack BR (5).

5

Remove disk spring (5t).

6

Remove screws (6s).

7

Remove multidisk brake B2 (6).

8

Remove parking lock gear (7).



Check

9

Check multidisk brake B2 (6) for scorch marks and wear.

If scorch marks or worn disks are visible,



Replace disks of multidisk brake B2 (6).

AR27.50-S-0880PS

10

Check clutch pack BR (5) for scorch marks and wear.

If scorch marks or worn disks are visible,



Replace disks of clutch pack BR (5).

11

Check parking lock gear (7) for damage.

If damage is visible,



Replace parking lock gear (7).



Install

12

Lie new disks in transmission oil for at least one hour.

When replacing.



Automatic transmission fluids (ATF) (specification 236.15)

BB00.40-P-0236-15A

13

Install parking lock gear (7).

14

Install multidisk brake B2 (6).


The external plate carrier of the multidisk brake B2 (6) is simultaneously the piston of clutch pack BR (5) and must not tilt over.
Otherwise function of clutch pack BR (5) is not ensured.

15

Screw in new screws (6).

 Before tightening the screws/bolts (6s), press the external plate carrier from inside against the park pawl gear (7).

 Bolt, multi-disk brake B2 to transmission housing

*BA27.40-N-1003-01I

16

Install disk spring (5t).

 Insert disk spring (5t) in such a way that the curvature of the inner circumference points toward the multidisk brake B2 (6).

17

Install clutch pack BR (5).

18

Press clutch pack BR (5) together.

19

Install retaining ring (5s).

 Pliers

*000589523700



Measure

20

Measure and adjust clearance of multidisk brake BR (5).

AR27.51-S-7229-01PS

 The thickness of the retaining ring (5s) determines the clearance.

Clearance of multi-disk brake BR

*BE27.50-N-1004-02B

 Pliers

*000589523700

21

Attach transmission housing (1) to torque converter housing.

AR27.40-S-0003PS

Set values for multi-disk brake

Number

Designation

Transmission 722.9

BE27.50-N-1004-02B

Clearance of multi-disk brake BR

mm

1,00...1,40

 Housing

Number

Designation

Transmission 722.9

BA27.40-N-1003-01I

Bolt, multi-disk brake B2 to transmission housing

Stage 1

Nm

10

Stage 2

°

90