Disassemble/assemble multi-disk brake B3

AR27.50-P-0890W

Disassemble/assemble multi-disk brake B3

4.5.15

Transmission

722.9, 724.2

Modification notes

26.8.14

"Remove main components of the transmission" added.

Operation step 1

26.8.14

"Install main components of the transmission" added.

Operation step 26

5

Clutch pack

15s

Retaining ring

5t

Disk spring

15t

Disk spring

15a

External plate carrier

105

End disk

15k

Piston

105s

Retaining ring

15a

External plate carrier

15s

Retaining ring

15t

Disk spring

1

External plate carrier without outer phase (old design)

2

External plate carrier with outer phase (new design)

15a

External plate carrier



Notes on automatic transmission

AH27.19-P-0001-01NKB



Remove

1

Remove main components of transmission

AR27.50-P-0610W



Disassemble

2

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

3

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

Check individual disks for scorch marks and wear, if necessary:



Replace clutch pack (5).

4

Place multidisk brake into lever press

5

Place thrust device onto disk spring (15t) in external plate carrier (15a)

  Position thrust device precisely (see arrow in second picture) to enable retaining ring (15s) to be removed later.

 Pressing tool

*722589013100

 Set of drifts

*722589041500

6

Actuate lever press until retaining ring (15s) is exposed


Stop lever press stoke as soon as accessibility to groove is sufficient.
Otherwise excessive clamping forces will result in damage to the plate carrier.

7

Remove retaining ring (15s) from groove

8

Move back lever press

9

Remove thrust device and multidisk brake from lever press

10

Remove retaining ring (15s)

11

Remove disk spring (15t)

12

Remove piston (15k) from external plate carrier (15a)

 Check vulcanized seal.



Check

13

Check external plate carrier (15a) for wear and damage

 Depending on the manufacture date, an external plate carrier without inner phase (1) or an external plate carrier with inner phase (2) is installed (see third picture). This is why it is necessary to note the parts information in the EPC later on when installing a new retaining ring (15s).



Assemble

14

Install piston (15k)

15

Install disk spring (15t)

 Insert disk spring (15t) in such a way that the curvature of the inner circumference points toward the piston (15k).

16

Fit retaining ring (15s)


Always note parts information in the EPC.
Otherwise proper operation of the multidisk brake cannot be ensured.

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

17

Place multidisk brake into lever press

18

Place thrust device on disk spring (15t)

  Position thrust device precisely (see arrow in second picture) to enable retaining ring (15s) to be installed.

 Pressing tool

*722589013100

 Set of drifts

*722589041500

19

Actuate lever press until groove of retaining ring (15s) is exposed


Stop lever press stoke as soon as accessibility to groove is sufficient.
Otherwise excessive clamping forces will result in damage to the plate carrier.

20

Install retaining ring (15s)


Note the installation position of the retaining ring (15s).
If incorrectly installed the disk spring (5t) jams and malfunctions occur.

21

Move back lever press

22

Remove thrust device and multidisk brake from lever press

23

Install disk spring (5t) and clutch pack (5) into external plate carrier (15a)

 Insert disk spring (5t) in such a way that curvature of the inner circumference points toward the piston (15k).

Observe insertion sequence when inserting disks:



Survey of multi-disk components, production details



Transmission 722.9

GF27.51-P-5200W

24

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

25

Measure and adjust clearance

Transmission 722.9, 724.2Multidisk brake B1, B2, B3 and multidisk clutch K1, K2,K3

AR27.51-P-7229W



Install

26

Install main components of transmission

AR27.50-P-0610W