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

AR27.50-S-0782E

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

16.11.2018

Model

447 with engine 651 with transmission 722.9

Model

447, 448 with engine 274 with transmission 722.9

1

Transmission housing

5t

Disk spring

7

Park pawl gear

5

Clutch pack BR

6

B2 multidisk brake

5s

Retaining ring

6s

Screw

Notes on automatic transmission

AH27.19-P-0001-01NKB



Remove

1

Remove transmission housing (1) from torque converter housing.

AR27.50-S-0601E

2

Remove retaining ring (5s).

 To do so, press together clutch pack BR (5).

3

Remove clutch pack BR (5).

4

Remove disk spring (5t).

5

Remove screws (6s).

 Hold the multidisk brake B2 (6) while unscrewing.

6

Remove multidisk brake B2 (6).

If required



Disassemble/assemble multi-disk brake B2

AR27.50-S-0880E

7

Remove parking lock gear (7).



Check

8

Check parking lock gear (7) for damage; replace as per findings.



Install

9

Install parking lock gear (7).



Measure

10

Measure and adjust clearance of multidisk brake B2 (6).

AR27.51-S-7229E

11

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.

12

Screw in screws (6s).


Before tightening the screws/bolts (6s), press the external plate carrier from the inside against the park pawl gear (7).
Otherwise the components could get damaged.

 Replace screws/bolts (6s).

 Bolt, multi-disk brake B2 to transmission housing

*BA27.40-N-1003-01I

13

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).



Check

14

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

 Replace disks as per findings.

15

Install clutch pack BR (5).

16

Install retaining ring (5s).

 To do so, press together clutch pack BR (5).



Measure

17

Measure and adjust clearance of multidisk brake BR.

AR27.51-S-7229-01E



Automatic transmission fluids (ATF) (specification 236.15)

BB00.40-P-0236-15A

 The thickness of the retaining ring (5s) determines the clearance.
Commercially available devices/tools
Feeler gage
Outside micrometer

Clearance of multi-disk brake BR

*BE27.50-N-1004-02B

18

Install transmission housing (1) at torque converter housing.

AR27.50-S-0601E

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