Clutch servo unit removal and installation

AR25.20-W-0300E

15.6.09

MODEL 930, 932, 933, 934
except CODE (GE2) Electronic drive control II
except CODE (GE3) Mercedes PowerShift
except CODE (GE7) Mercedes PowerShift 2
except CODE (IY2) Hydraulic fluid as per sheet 345.0

MODEL 942, 943, 958.4 except CODE (IY2) Hydraulic fluid as per sheet 345.0

MODEL 375.4, 940, 944
except CODE (IY2) Hydraulic fluid as per sheet 345.0
except CODE (GE3) Mercedes PowerShift

Clutch servo unit removal and installation

W25.20-1020-09

1 Plunger

2 Clutch servo assistance

3 Clutch travel sensor connector

8 Sealing ring

9 Banjo bolt

10 Sealing ring

11 Connector

4 Compressed-air line

5 Fuse

6 Hydraulic line

7 Banjo union (compressed air line)

W25.20-1055-12

2 Clutch servo assistance

3 Clutch travel sensor connector

4 Compressed-air line

6 Hydraulic line

12 Compressed air line bracket

13 Electrical connector

 	Remove/install
 Danger!	Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes.	Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.	AS42.50-Z-0001-01A
	Brake fluid notes		AH42.50-P-0001-01A
1	Drain reservoir pressure of compressed air system
2	Separate clutch travel sensor connector (3)
3	Detach compressed air line bracket (12)
4	Detach compressed-air line (4)	 Counterhold at the banjo bolt (9) when loosening the compressed air line (4).
			*BA25.20-N-1010-01J
5	Unscrew the banjo bolt (9)		*BA25.20-N-1003-01J
6	Remove locking device (5) from connector (11) and detach hydraulic line (6)	Collect escaping brake fluid using a suitable container.
7	Disconnect electrical connector (13)
8	Remove clutch servo unit (2)		*BA25.20-N-1001-01J
9	Remove plunger (1)	 Installation: Clean ball head and guide of plunger (1) and grease with long-life grease.	*BR00.45-Z-1001-06A
10	Detach connector (11)	 Only when replacing the clutch booster (2).
			*BA25.20-N-1003-01J
11	Install in the reverse order
12	Bleed clutch operating system		AR25.20-W-0070F

 Clutch booster

Number	Designation		Model 374.607/ 691/695, 375.4	Model 930, 932, 933, 934	Model 940, 942, 943, 944	Model 958.4


BA25.20-N-1001-01J	Bolt, clutch booster to transmission housing	Nm	50	50	50	50
BA25.20-N-1003-01J	Banjo bolt (compressed-air line) on clutch booster	Nm	40	40	40	40
BA25.20-N-1010-01J	Union nut (compressed-air line) at clutch booster	Nm	40	40	40	40

Auxiliary repair materials

Number	Designation	Order number
BR00.45-Z-1001-06A	Long-life grease	A 000 989 63 51 11

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