Disassemble/assemble multi-disk brake B2

AR27.50-D-0880WE

Disassemble/assemble multi-disk brake B2

18.07.2019

Transmission

722.9 in model 906

1

Retaining ring

6

Retaining ring

10

Externally-toothed disk carrier B2

2

End disk

7

Guide ring

10.1

Sealing ring

3

Disk pack B2

8

Disk spring

10.2

Sealing ring

4

Externally toothed plate

9

Piston

11

Piston guide

5

Disk spring

9.1

Sealing ring

11.1

Sealing ring

6

Retaining ring

7

Guide ring

10

Externally-toothed disk carrier B2

11

Piston guide

A

Hole

B

Hole



Remove

Notes on automatic transmission

AH27.19-P-0001-01NKB

1

Remove B2 clutch pack (3)

AR27.50-D-0782WE



Disassemble

2

Remove retaining ring (1) and end disk (2)

3

Remove B2 clutch pack (3), outer plate (4) and disk spring (5)

 Check disks for scorch marks and wear.

4

Place assembly device on disk spring (8) and tension until retaining ring (6) is exposed

 Assembly device

*140589134300

5

Remove circlip (6)

 Pliers

*000589523700

6

Remove assembly device

7

Remove disk spring (8)

8

Remove guide ring (7) and piston (9); to do so, blow compressed air into bore (B) of piston guide (11)

 Blow compressed air in carefully.

9

Separate piston guide (11) from B2 outer plate carrier (10); to do so, blow compressed air into bore (A)

 Blow compressed air in carefully.

 The external plate carrier B2 (10) also serves as the piston for the multidisk brake B3.



Assemble

10

Assemble piston guide (11) and external plate carrier B2 (10)

AR27.50-D-0880-01WE

 Replace sealing rings (9.1, 10.1, 10.2, 11.1). With sealing rings (10.1, 11.1), the rounded edges must face outward.

11

Install piston (9)

 Replace compression ring (9.1).
The rounded off edges must point outwards.

12

Insert guide ring (7)

13

Insert disk spring (8)

 Observe installation position.

14

Place assembly device on disk spring (8) and tension until groove for retaining ring (6) is exposed

 Assembly device

*140589134300

15

Install retaining ring (6)

 Pliers

*000589523700

16

Remove assembly device

17

Install disk spring (5), outer plate (4) and B2 clutch pack (3)

 Insert disk spring (5) in such a way that the curvature of the inner circumference points toward the piston (9).

18

Install end disk (2) and retaining ring (6)



Measure

19

Measure and adjust clearance

AR27.51-D-7229WE



Install

20

Install B2 clutch pack (3).

AR27.50-D-0782WE