Remove/install clutch

AR25.10-B-0050H

Remove/install clutch

21.02.2020

Model

384.067

Model

688.232/254/255

Model

688.276

Model

693.028/396

Represented in vehicle 688, 693 with engine 904.9

1

Clutch disk

2

Clutch plate

3

Washer

4

Bolt

5

Clutch bearing

6

Clutch drive system (clutch central drive unit)

7

Connection pipe

8

Centering mandrel

Represented in vehicle 384.067 with engine 904.920

1

Clutch disk

2

Clutch plate

3

Washer

4

Bolt

5

Clutch bearing

6

Clutch drive system (fork)

8

Centering mandrel

9

Clamp

10

Sealing gasket

11

Hydro-servo pneumatic cylinder



Remove

 Caution

Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid

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

1.1

Detach the hydraulic line of the connection pipe (7) and fully bleed the system

Vehicles 688.232/254/255/276, 693.028/396.

1.2

Remove the servo hydraulic and pneumatic cylinder (11)

Vehicles 384.067.

2

Transmission removal

3

Remove the clutch plate (2) together with the clutch disc (1)

 Unscrew the bolts (4) alternately, crosswise. Unfasten the gradually, in order to avoid excessive unilateral load on the plate. Pay attention to the clutch disc position.



Check

4

Check the conditions of the clutch plate (2) and clutch disc (1)

In case of cracks, signs of overheating and/or wear of the friction surface:



Replace the clutch plate and/or disc.

5

Check the conditions of the engine flywheel

In case of cracks and/or damage of the friction surface, repair the engine flywheel:



Engine 904, 924.

AR03.30-B-8022A

6

Check the engine flywheel guide bearings conditions

In case of identifiable wear or faulty operation, replace the engine flywheel guide bearing:



Engine 904.918/919/924/925/957, 906.924, 924.9

AR03.30-B-8401A

7

Check the conditions of the clutch bearing (5) and clutch actuation system (6)

In case of identifiable wear or faulty operation of the bearing and/or clutch drive system:



Vehicles 688.232/254/255, 693.028/396 - replace the central drive unit of the clutch.

AR25.20-B-0180A

Vehicles 384.067 - Replace the clutch bearing and/or remove the clutch fork and perform the required corrections.

AR25.20-B-0200E

8

Check the clutch actuation system fluid, for contamination

 In the case of fluid contamination, wash the actuation system and replace the fluid.

Check the conditions of the master cylinder. If necessary, remove it and repair it:



Pedal assembly, with single bracket.

AR25.20-B-0100B

9

Check the conditions of the clutch actuation pneumatic system

 Vehicles equipped with hydro-servo-pneumatic cylinder. In the case of contamination with water in the pneumatic part, drain the reservoirs and check the conditions of the draining valve. In the case of contamination of the pneumatic part, by engine oil, check the air compressor conditions.

 The disc must move easily on the drive shaft, without presenting excessive play



Install

10

Install the clutch disc (1) and the clutch plate (2), centering the disc with the help of a centering mandrel (8)

 Assure correct mounting position for clutch disk. Remove the centering mandrel only after the tightening of the plate fastening bolts.

 Tighten the bolts (4) alternately and gradually. While tightening, continuously check if the mandrel can be easily dislodged. If the clutch disc is installed eccentrically, difficulties will occur during the installation of the gearbox.

 Clutch pressure plate fastening to engine flywheel

*BA25.10-B-1001-01M

 Centering drift

*677589006100

 Alignment punch

*906589006100

11

Transmission installation

12.1

Connect the hydraulic line to the connection pipe (7)

Vehicles 688.232/254/255/276, 693.028/396.

12.2

Install the servo hydraulic and pneumatic cylinder (11) for clutch fork (9) driving

Vehicles 384.067.

13

Supply and bleed the clutch actuation system

AR25.20-B-0070B

 Clutch

Number

Designation

Engine 904.9; 924.9 with MF 362 clutch

Engine 906.9; 926.9 with MF 395 clutch

BA25.10-B-1001-01M

Clutch pressure plate fastening to engine flywheel

Nm

30

58

 Clutch

Number

Designation

Engine 906.9; 926.9 with MFZ 430 clutch

Engine 904.9, 924.9 with MF 395 clutch

BA25.10-B-1001-01M

Clutch pressure plate fastening to engine flywheel

Nm

58

58