DAF LF45, LF55 Series. Manual - part 269

©

 200508

4-3

Inspection and adjustment

CLUTCH

ΛΦ45/55 series

3

9

Note:

While releasing the clutch pedal, the clutch servo 

should bleed itself via this bleed vent. 

4.

Depress the clutch pedal and check that 

there is no leakage via the clutch servo bleed 

vent.

5.

Check that there is no oil leakage via the vent 

opening (10).

Note:

A drop of oil on the vent opening (10) is normal 

and is not a reason to replace the clutch servo. 

If there is constant leakage, the clutch servo must 

be repaired or replaced.

If in doubt as to whether the clutch servo situation 

is normal or whether there is a leak, inspect the 

fluid level in the clutch reservoir.

6.

Depress the clutch pedal and check whether 

there is an air leak via the vent opening (10).

CLUTCH

4-4

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 200508

Inspection and adjustment

9

ΛΦ45/55 series

3

4.2 CHECKING CLUTCH FLUID LEVEL

Hydraulic fluid is toxic and can 

therefore have a damaging effect on 

your health. Any direct or indirect 

physical contact should therefore be 

avoided. As hydraulic fluid is also 

corrosive it may damage the 

paintwork of the vehicle. Any 

contact between hydraulic fluid and 

paintwork should therefore be 

avoided.

Always use new and clean hydraulic 

fluid which has been kept in a sealed 

container that meets the 

specifications. Hydraulic fluid which 

has absorbed water (from the 

ambient air) may have an adverse 

effect on the operation of the clutch 

system. Avoid any contact with 

mineral oil. Even one drop of mineral 

oil in the system will damage the 

seals.

1.

Check whether the fluid level is between the 

MINI and MAXI marks when the cab is in the 

driving position.

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MAXI

P MAX 4 BAR

MINI

G0 00 213

©

 200508

5-1

Removal and installation

CLUTCH

ΛΦ45/55 series

3

9

5. REMOVAL AND INSTALLATION

5.1 REMOVAL AND INSTALLATION, CLUTCH SERVO

Hydraulic fluid is toxic and can 

therefore have a damaging effect on 

your health. Any direct or indirect 

physical contact should therefore be 

avoided.

As hydraulic fluid is also corrosive it 

may damage the paintwork of the 

vehicle. Any contact between 

hydraulic fluid and paintwork should 

therefore be avoided.

Always use new and clean hydraulic 

fluid which has been kept in a sealed 

container that meets the 

specifications. Hydraulic fluid which 

has absorbed water (from the 

ambient air) may have an adverse 

effect on the operation of the clutch 

system. Avoid any contact with 

mineral oil. Even one drop of mineral 

oil in the system will damage the 

seals.

Removing clutch servo
1.

Remove the air pipe from the clutch servo.

2.

Place a container beneath the clutch servo 

and remove the fluid pipe. Then plug the 

pipe.

Note:

The clutch servo is mounted against the clutch 

housing under pre-tension. 

3.

Remove the attachment nuts from the clutch 

servo.

Fitting clutch servo
1.

Fit the clutch servo.

Note:

Make sure that the push rod falls into the cup-

shaped recess in the wear indicator. Then tighten 

the attachment nuts evenly.

2.

Tighten the attachment nuts evenly.

3.

Connect the air and fluid pipes.

4.

Fill and bleed the clutch system.

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V300289

10

CLUTCH

5-2

©

 200508

Removal and installation

9

ΛΦ45/55 series

3

5.2 REMOVAL AND INSTALLATION, THRUST BEARING

Removing thrust bearing
1.

Remove the gearbox.

2.

Remove the thrust bearing from the gearbox 

front cover in the clutch housing.

Installation, thrust bearing

In the case of thrust bearings with a 

plastic coating, no grease should be 

used on the gearbox front cover. The 

grease will attack the plastic coating 

and shorten the service life of the 

thrust bearing.

1.

Check the clutch lever for wear.

2.

Check the pressure fingers of the diaphragm 

spring for wear.

3.

Apply a little grease to all pressure surfaces 

of the clutch lever.

4.

Ensure that the gearbox front cover is free of 

grease and dirt.

5.

Install the thrust bearing on the gearbox front 

cover. No grease is permitted.

6.

Fit the gearbox.

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