Disassemble/assemble multidisk clutch K27

AR27.50-D-0619TSC

14.07.2019

Transmission

725.0 in model 907

Disassemble/assemble multidisk clutch K27

1	K27 multiplate clutch
2	Output shaft
3	Park pawl gear
4	Torque converter housing
5	Retaining ring
6	Clutch pack
7	External plate carrier
8	Pressure device
9	Spring retainer
10	Retaining ring
14	Torlon rings

D27.50-A001-06

7	External plate carrier
9	Spring retainer
10	Retaining ring
11	Disk spring
12	Piston
13	Bearing
14	Torlon rings
15	Sealing ring
16	Sealing ring
17	Sealing ring

P27.00-2426-06

	Notes on automatic transmission		AH27.19-P-0001-01NKB
 	Disassemble/assemble
1	Remove retaining ring (5) of multiplate clutch K27 (1).
2	Remove clutch pack (6).
3	Attach pressure testing device (8) onto outer plate carrier (7) and push down on spring retainer (9) until the retaining ring (10) is exposed.	 Pressing tool	*722589013100
		 Set of drifts	*722589041500
4	Remove retaining ring (10).	 Pliers	*000589523700
5	Apply some compressed air through hole to output shaft (2) and remove piston (12).	 Slowly apply compressed air.
		 The compressed air pushes the piston (12) out of the outer plate carrier (7).
6	Remove spring retainer (9).	 Assembly: Pay attention to installation position.
7	Remove disk spring (11).	 Assembly: Pay attention to installation position.
8	Remove sealing rings (15, 16, 17).
	Automatic transmission fluids (ATF) (specification 236.17)		BB00.40-P-0236-17A
		 Assembly: Replace sealing rings (15, 16, 17) and coat with transmission oil.
	Check
9	Check bearing (13).		AR27.40-D-0510TSC
		If the bearing (13) is found to be damaged,
		
		replace outer plate carrier (7) and needle bearing in transmission housing.
10	Check parking lock gear (3).		AR27.40-D-0510TSC
		If the parking lock gear (3) is found to be damaged,
		
		replace outer plate carrier (7) and needle bearing in transmission housing.
11	Replace Torlon rings (14).	 Assembly: Do not bend or crush Torlon rings (14). Otherwise, the Torlon rings (14) may be damaged.
		 Assembly: Mount Torlon rings (14) onto sleeve. Mount sleeve over output shaft (2) at top and slowly remove Torlon rings (14) from output shaft (2).
		 Set of sleeves	*725589011400
12	Assembly in reverse order
	Concluding tasks
13	Measure clearance of multiplate clutch K27 (1) and adjust, if necessary.		AR27.51-D-0550-04TSC
		Clearance in multidisk clutch K27	*BE27.51-P-1004-01E
		 Parallel support	*168589032100
		 Pressing tool	*722589013100
		 Set of drifts	*722589041500
		 Pressure cylinder	*725589033100

Adjustment values for multidisk clutch/multidisk brake

Number	Designation				Transmission 725.0
BE27.51-P-1004-01E	Clearance in multidisk clutch K27	Contact force for clearance adjustment	F1	N	600
		Number of internal plates	3	mm	1,8…2,0
			4	mm	2,2…2,4
			5	mm	2,6…2,8
			6	mm	2,9…3,1
			7	mm	3,1…3,3