Measure and adjust clearance

AR27.51-S-7229E

Measure and adjust clearance

19.11.2018

Model

447 with engine 651 with transmission 722.9

Model

447, 448 with engine 274 with transmission 722.9

105

End disk

105s

Retaining ring

T

Depth gauge

M1

Mark

M2

Mark

M3

Mark

M4

Mark

Notes on automatic transmission

AH27.19-P-0001-01NKB



Measure

1

Place respective multidisk brake or multiplate clutch in lever-type hand gun.



Automatic transmission fluids (ATF) (specification 236.15)

BB00.40-P-0236-15A

 Before the clearance measurement, the disks must be immersed in transmission oil for at least one hour so that the friction lining can swell up.

 Commercially available devices/tools
Lever-type hand gun

2

Put drifts of the thrust device on the end disk (105).


Position the drifts on the end disk (105) so that slipping off during the pressing process is prevented.
Otherwise the disks may break.

 Pressing tool

*722589013100

 Set of drifts

*722589041500

3

Operate lever-type hand gun.


Markings (M1, M2, M3, M4) identify the required clamping force.
If the contact force is exceeded, the components can be damaged.

 Respective assignment of markings (M1, M2, M3, M4):
Multidisk brake B1: Marking (M1)
Multidisk brake B2: Marking (M3)
Multidisk brake B3: Marking (M1)
Multidisk clutch K1: Marking (M2)
Multidisk clutch K2: Marking (M4)
Multidisk clutch K3: Marking (M1)

 Commercially available devices/tools
Lever-type hand gun

Play in multiple-disc brake B1

*BE27.50-N-1001-02B

Play in multiple-disc brake B2

*BE27.50-N-1002-02B

Play in multiple-disc brake B3

*BE27.50-N-1003-02B

Play in multiple-disc clutch K1

*BE27.51-N-1001-01C

Play in multiple-disc clutch K2

*BE27.51-N-1002-01C

Play in multiple-disc clutch K3

*BE27.51-N-1003-01C

4

Put on parallel gauge.

 Parallel rest

*126589043100

5

Determine distance between the parallel surface upper edge and end disk (105) using depth gauge (T).

 Determine distance at two points of the circumference of the end disk (105) and note the mean value as a dimension.

 Commercially available devices/tools
Depth gauge

6

Reset hand lever press.

7

Press end disk (105) against the retaining ring (105s).


Attach a suitable tool (e.g. screwdriver) carefully between end disk (105) and first friction plate (arrow).
The end disk (105) and the friction plate will be bent otherwise and, as a consequence, the friction lining will be damaged.

8

Determine distance between the parallel surface upper edge and end disk (105) using depth gauge (T).

 Determine distance at two points of the circumference of the end disk (105) and note the mean value as a dimension.

 The difference between the two measured distances gives the clearance.
Commercially available devices/tools
Depth gauge

Adjust clearance

9

Remove retaining ring (105s).

10

Determine thickness of retaining ring (105s).

 Note determined value. Retaining rings (105s) are available in a 0.3 mm graduation.

 Commercially available devices/tools
Outside micrometer

11

Adjust clearance.

 To do so, install retaining ring (105s) of appropriate thickness. The thickness of the retaining ring (105s) alters the clearance.

Play in multiple-disc brake B1

*BE27.50-N-1001-02B

Play in multiple-disc brake B2

*BE27.50-N-1002-02B

Play in multiple-disc brake B3

*BE27.50-N-1003-02B

Play in multiple-disc clutch K1

*BE27.51-N-1001-01C

Play in multiple-disc clutch K2

*BE27.51-N-1002-01C

Play in multiple-disc clutch K3

*BE27.51-N-1003-01C

Set values for multi-disk brake

Number

Designation

Transmission 722.9

BE27.50-N-1001-02B

Play in multiple-disc brake B1

Contact force for clearance adjustment B1

M1

N

600

Number of multiple-discs

3

mm

2,00...2,40

4

mm

2,20...2,60

Set values for multi-disk brake

Number

Designation

Transmission 722.9

BE27.50-N-1002-02B

Play in multiple-disc brake B2

Contact force for clearance adjustment B2

M3

N

1000

Number of disks of internally toothed plates

4

mm

1,70...2,10

5

mm

1,80...2,20

Number of disks of externally toothed plates

5

mm

1,70...2,10

6

mm

1,80...2,20

Set values for multi-disk brake

Number

Designation

Transmission 722.9

BE27.50-N-1003-02B

Play in multiple-disc brake B3

Contact force for clearance adjustment B3

M1

N

600

Number of multiple-discs

3

mm

2,00...2,40

4

mm

2,20...2,60

5

mm

2,30...2,70

Adjustment values of multi-disk clutch

Number

Designation

Transmission 722.9

BE27.51-N-1001-01C

Play in multiple-disc clutch K1

Contact force for clearance adjustment K1

M2

N

800

Number of internal plates

3

mm

2,00...2,40

4

mm

2,20...2,60

5

mm

2,40...2,80

6

mm

–

Adjustment values of multi-disk clutch

Number

Designation

Transmission 722.9

BE27.51-N-1002-01C

Play in multiple-disc clutch K2

Contact force for clearance adjustment K2

M4

N

1200

Number of internal plates

3

mm

1,70...2,10

4

mm

1,90...2,30

5

mm

2,10...2,50

6

mm

2,20...2,60

7

mm

–

8

mm

–

Adjustment values of multi-disk clutch

Number

Designation

Transmission 722.9

BE27.51-N-1003-01C

Play in multiple-disc clutch K3

Contact force for clearance adjustment K3

M1

N

600

Number of internal plates

3

mm

–

4

mm

2,20...2,60

5

mm

2,40...2,80