Disassemble/assemble multi-disk brake B1

AR27.50-D-0870WE

Disassemble/assemble multi-disk brake B1

18.07.2019

Transmission

722.9 in model 906

5

Clutch pack

16l

Bearing

105s

Retaining ring

5t

Disk spring

16s

Retaining ring

161

Thrust bearing

16a

External plate carrier

16t

Disk spring

162

Bearing

16k

Piston

105

End disk

16a

External plate carrier

16s

Retaining ring

16t

Disk spring



Disassemble

Notes on automatic transmission

AH27.19-P-0001-01NKB

1

Check thrust bearing (161) and bearing (162)

 Check the contact surfaces, thrust bearing (161), bearing (162) and sealing rings (see arrow in picture 1) for swirl marks and damage; replace if necessary.
The thrust bearing (161) and bearing (162) together with the external plate carrier (16a) form a single unit and must always be replaced together.

2

Remove retaining ring (105s) and end disk (105)

3

Remove clutch pack (5) and disk spring (5t)

 Check the disks for scorch marks and wear; replace if necessary.

4

Place external plate carrier (16a) in lever press

5

Place thrust device on disk spring (16t)

  Position the thrust device precisely (see arrow in picture 2) to enable the retaining ring (16s) to be removed later.

 Pressing tool

*722589013100

 Set of drifts

*722589041500

6

Actuate lever press until retaining ring (16s) is exposed


Stop lever press stoke as soon as accessibility to groove is sufficient.
Excessive clamping force will damage the plate supports.

7

Remove retaining ring (16s) from groove

8

Move back lever press

9

Take thrust device and external plate carrier (16a) out of lever press

10

Remove retaining ring (16s)

11

Remove disk spring (16t)

12

Remove piston (16k) from external plate carrier (16a)

 Check vulcanized-on seal for damage; replace piston (16k) if necessary.



Check

13

Check external plate carrier (16a) for damage



Assemble

14

Install piston (16k)

15

Install disk spring (16t)

 Insert disk spring (16t) in such a way that curvature of inner circumference points toward piston (16k).

16

Fit retaining ring (16s)

 Final installation is only possible when the lever press is actuated.

17

Place external plate carrier (16a) in lever press

18

Place thrust device on disk spring (16t)

  Position the thrust device precisely (see arrow in picture 2) to enable the retaining ring (16s) to be installed.

 Pressing tool

*722589013100

 Set of drifts

*722589041500

19

Actuate lever press until groove of retaining ring (16s) is exposed


Stop lever press stoke as soon as accessibility to groove is sufficient.
Excessive clamping force will damage the plate supports.

20

Install retaining ring (16s)


Ensure that the installation position of the retaining ring (16s) is correct.
Otherwise the disk spring (5t) will jam.

21

Move back lever press

22

Take thrust device and external plate carrier (16a) out of lever press

23

Install disk spring (5t) and disk pack (5) in external plate carrier (16a)

 Insert disk spring (5t) in such a way that curvature of inner circumference points toward piston (16k).

24

Install end disk (105) and retaining ring (105s)



Measure

25

Measure and adjust clearance

AR27.51-D-7229WE