DAF LF45, LF55 Series. Manual - part 462

©

 200436

2-27

Inspection and adjustment

BRAKE SYSTEM AND COMPONENTS

ΛΦ45/55 series

6

4

2.19 BRAKE ADJUSTMENT, DISC BRAKE VERSION

1.

Position a feeler gauge between the rear of 

the brake pad and one of the thrust pieces of 

the brake calliper to check the play. 

Compare the measured value (see 

"Technical data").

2.

If the play is not correct, it needs to be 

adjusted. Remove the covering cap from the 

slack adjuster.

3.

Fit a ring spanner on the hexagonal adjusting 

bolt and turn the hexagonal adjusting bolt 

anticlockwise until there is ample clearance 

between the brake pads and the brake disc.

Note:

If Knorr disc brake construction is fitted:

Never turn the hexagonal adjusting bolt 

without using an adapter (23). The adapter is 

a torque safety and will break off when the 

torque is too high. Without the use of an 

adapter the mechanics in the brake calliper 

may become damaged when the torque is 

too high, so that replacement of the brake 

calliper may be necessary.

4.

Position a feeler gauge with the correct 

thickness (see "Technical data") between 

the brake pad and the thrust piece of the 

adjuster with the hexagonal adjusting bolt.

5.

Turn the hexagonal adjusting bolt clockwise 

with the ring spanner until the feeler gauge 

just fits. Remove the feeler gauge.

6.

Apply the brake a number of times so that the 

play can set.

7.

Release the brake. Now it should be possible 

to turn the hub by hand.

8.

Position a feeler gauge between the rear of 

the brake pad and one of the presure plates 

of the brake calliper to check the play. 

Compare the measured value (see 

"Technical data").

9.

After the inspection, lightly grease the 

sealing cap (see "Technical data") and 

replace it on the slack adjuster.

23

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R600463

BRAKE SYSTEM AND COMPONENTS

2-28

©

 200436

Inspection and adjustment

4

ΛΦ45/55 series

6

2.20 INSPECTION, AIR TIGHTNESS

Air tightness
If the brake system of a vehicle has been charged 

to the maximum pressure, it should generally be 

possible to drive the vehicle away after a period 

of 16 hours of uninterrupted standstill, without 

first having to charge the brake system to 

sufficient operating pressure.

This implies a maximum pressure drop of approx. 

0.4 bar per hour at normal system pressure.

Note:

Always connect auxiliary consumers and 

accessories to circuit 4.

©

 200436

3-1

Removal and installation

BRAKE SYSTEM AND COMPONENTS

ΛΦ45/55 series

6

4

3. REMOVAL AND INSTALLATION

3.1 REMOVAL AND INSTALLATION, QUICK-RELEASE COUPLING

When disconnecting pipes and/or 

quick-release couplings, ensure that 

the relevant connection has first 

been made pressureless.

Removing the quick-release coupling
1.

Loosen the quick-release coupling using an 

open-ended spanner.

2.

Remove the quick-release coupling from the 

valve.

Installing the quick-release coupling
1.

Check the bore in the valve for dirt and clean 

the bore as necessary.

2.

Fit the quick-release coupling to the valve.

3.

Tighten the quick-release coupling to the 

specified torque. See "Technical data".

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R600576

BRAKE SYSTEM AND COMPONENTS

3-2

©

 200436

Removal and installation

4

ΛΦ45/55 series

6

3.2 REMOVAL AND INSTALLATION, PIPE ON QUICK-RELEASE COUPLING

When disconnecting pipes and/or 

quick-release couplings, ensure that 

the relevant connection has first 

been made pressureless.

Removing the pipe on quick-release coupling
1.

Press the collar (1) against the quick-release 

coupling.

2.

Press the pipe out of the quick-release 

coupling.

Installing the pipe on quick-release coupling
1.

Check the quick-release coupling for 

damage. If the quick-release coupling is 

damaged, it must be replaced.

2.

Press the pipe into the quick-release 

coupling.

3.

Pull out the collar (1).

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R600575

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