DAF CF65, CF75, CF85 Series . Manual — part 1068

©

200424

4-5

Removal and installation

HYDRAULIC LIFTING GEAR

ΧΦ65/75/85 series

8

9

4.4 REMOVAL AND INSTALLATION, PRESSURE RELIEF VALVE

Removing the pressure relief valve
1.

Make sure that the trailing axle wheels are

fully lowered and on the ground.

2.

Clean the valve and the surrounding area.

Work cleanly.

3.

Remove the fuse from the lifting gear.

4.

Remove the entire valve (3) from the valve

block.

5.

The valve (3) itself cannot be disassembled.

If necessary, turn out the hexagonal socket

screw until the ball is lifted from its seat.

Subsequently purge the valve using

compressed air. Before unscrewing the Allen

screw, first measure the length of the Allen

screw protruding from the valve. After

purging the valve, screw the Allen screw into

the valve to the same length.

Installing the pressure relief valve
1.

Renew the O-rings(1) and (2). Apply a little

oil to the valve (3) and install it into the valve

block.

Tighten the valve to the specified torque.

See "Technical data".

2.

Install the fuse.

3.

Check the pressure and adjust if necessary.

See "Inspection and adjustment".

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2

3

A8 00 276

HYDRAULIC LIFTING GEAR

4-6

©

200424

Removal and installation

9

ΧΦ65/75/85 series

8

4.5 REMOVAL AND INSTALLATION, CYLINDER

Removing the cylinder
1.

Make sure that the trailing axle wheels are

fully lowered and on the ground.

2.

Clean the line connections and the

surrounding area.

3.

Remove the fuse from the lifting gear.

4.

Remove the shock absorber next to the

cylinder.

If the cylinder is located on the vehicle's left,

the linkage of the load-dependent brake-

control valve should also be removed.

5.

Remove the lines from the lifting cylinder.

Note: the line attached to line connection A of

the pump unit may retain a residual

pressure.

Wait for approx. 5 minutes after the trailing

axle has been lowered before disconnecting

the lines.

Collect the oil coming from the line.

Plug the openings.

6.

Disconnect the lines of the central greasing

system, if applicable.

7.

Remove the pin (4) that connects the

cylinder (3) with the lever (5).

8.

Remove the two bushes from the lever (5).

The cylinder will now point downwards,

causing part of the oil in the cylinder to flow

out.

9.

Remove the attachment nut (2) and remove

the cylinder (3) from the chassis support (1).

Collect the oil still present in the cylinder.

B

A

A8 00 281

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5

2

3

4

A8 00 283

©

200424

4-7

Removal and installation

HYDRAULIC LIFTING GEAR

ΧΦ65/75/85 series

8

9

Installing the cylinder
1.

Clean the pivot points of the cylinder

connection.

2.

Grease the chassis support pin. Fit the

cylinder on the pin. Hand-tighten the nut onto

the pin.

3.

Check the bushes (3) and grease them. Fit

the bushes (3) to the lever (4).

4.

Apply some grease to the connecting pin (6)

and install it in the bushes (3) with the nut

side pointing towards the chassis members.

5.

Fit the lock washer (2) with the nut (1) to the

pin (6). Tighten the nut (1) to the specified

torque. See "Technical data".

6.

Tighten the chassis support nut.

7.

Connect the hydraulic lines.

8.

Install the shock absorber and, if applicable,

the linkage of the load-dependent brake-

control valve.

9.

Reconnect the lines of the central lubricating

system, if applicable.

10. Manually lubricate the turning points, or do

so using the central greasing system.

11. Install the fuse.

12. Activate the lifting gear several times. Check

the oil level in the reservoir and top up, if

necessary.

Inspect the line connections for leaks.

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6

2 3

3

4

4

5

A8 00 284

HYDRAULIC LIFTING GEAR

4-8

©

200424

Removal and installation

9

ΧΦ65/75/85 series

8