DAF LF45, LF55 Series. Manual — part 269

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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

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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

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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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