DAF CF65, CF75, CF85 Series . Manual — part 915

©

200423

3-9

Removal and installation

BRAKE SYSTEM AND COMPONENTS

ΧΦ65/75/85 series

6

5

3.6 REMOVAL AND INSTALLATION, AUTOMATIC SLACK ADJUSTER

Disc brakes

Note:
The automatic slack adjuster of the brake calliper
should not be removed. If defective, the brake
calliper should be replaced.

Drum brakes

Removal, automatic slack adjuster
1.

Pressurise the system to at least 7.5 bar.

2.

Support the axle, and place chocks in front of
and behind the wheels of the other axle.

3.

Set the parking brake to the "Driving"
position.

4.

Completely unscrew the spindle of the spring
brake cylinder.

5.

Turn the brakes back completely by turning
the hexagonal adjusting bolt counter-
clockwise. During this operation, clicks will
be heard.

6.

Remove the split pin and yoke pin (A).

7.

Remove attachment nut (B) from the control
plate.

8.

Turn the hexagonal adjusting bolt anti-
clockwise, so that the slack adjuster is
released from the yoke.

9.

Remove attachment bolt (C) with the
retaining plate and adjusting rings.

10. Remove the slack adjuster.

Note:
It is possible that during the installation
of the slack adjuster the brake camshaft will
be pushed inwards. This can be prevented
by fitting a bolt in the brake camshaft, so that
during installation of the slack adjuster the
brake camshaft can be held in position.

R600141

A

C

B

BRAKE SYSTEM AND COMPONENTS

3-10

©

200423

Removal and installation

5

ΧΦ65/75/85 series

6

Installation, automatic slack adjuster
1.

Check the splines of the brake camshaft for
damage and wear, and re-grease them.

2.

Fit the spacer so that the slack adjuster is in
line with the yoke.

3.

Slide the slack adjuster onto the brake
camshaft. Note the arrow indicating the
direction of rotation during braking.

4.

Turn the hexagonal adjusting bolt clockwise
until the holes in it and the yoke engage.

5.

Insert the yoke pin with split pin.

6.

Lubricate the attachment bolt with Loctite
and fit the bolt with the retaining plate.

7.

Check the axial play of the slack adjuster.
See "Technical data". Check that the control
plate can still be moved.

R600142

©

200423

3-11

Removal and installation

BRAKE SYSTEM AND COMPONENTS

ΧΦ65/75/85 series

6

5

8.

Turn the control plate as far as possible
(until the internal stop is felt) in the direction
in which the slack adjuster is moved during
braking. Fix the control plate in this position
using the attachment nut on the fixed
bracket.

9.

Adjust the brakes. See "Inspection and
adjustment".

R600143

BRAKE SYSTEM AND COMPONENTS

3-12

©

200423

Removal and installation

5

ΧΦ65/75/85 series

6

3.7 REMOVAL AND INSTALLATION, BRAKE DRUM

Removal, brake drum
1.

Pressurise the air system.

2.

Place chocks in front of and behind the
wheels of an axle on which you are not
working.

3.

Release the parking brake by means of the
parking brake valve or by removing the
release bolts from the spring brake cylinders.

4.

Turn the automatic slack adjuster back
completely.

5.

Unscrew the wheel nuts.

6.

Jack up the axle in question.

7.

Support the axle with stands.

8.

Remove the wheels.

9.

Remove the two attachment bolts (A) from
the brake drum.

10. Insert two jack screws in the threaded

holes (B).

11. Note:

Never use a pneumatic tool for tightening the
jack screws.
Tighten them evenly by hand. This brings the
brake drum to pressure. Use a copper punch
to work the brake drum from the hub.
Use lifting gear to remove the brake drum.

Installation, brake drum
1.

Clean the fitting edge of the brake drum and
the wheel rim with a steel wire brush.

2.

Then smear the fitting edge lightly with
grease. This grease layer should prevent the
brake drum from rusting tight.

3.

Remove the jack screws from the brake
drum.

4.

Fit the brake drum using the lifting gear.

5.

Fit two wheel nuts opposite one another.

6.

Tighten these wheel nuts evenly until the
brake drum is correctly on the hub.

7.

Remove the wheel nuts.

8.

Fit the attachment bolts for the brake drum.

R600144

B

B

A

A