DAF CF65, CF75, CF85 Series . Manual - part 160

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4-23

Removal and installation

SEATS

ΧΦ65/75/85 series

1

7

4.25 REMOVAL AND INSTALLATION, OPERATING VALVE FOR PNEUMATIC 

LUMBAR SUPPORT

Removing operating valve for pneumatic 
lumbar support
1.

Remove the seat squab.

2.

Remove the side cover panel on control side 
without disconnecting the pipes.

3.

Remove the air pipes from the operating 
valve for the pneumatic lumbar support (1).

4.

Use a screwdriver to lift the operating valve 
for the pneumatic lumbar support (1) from 
the cover (2) (the valve may be damaged 
slightly in the process).

Installing operating valve for pneumatic 
lumbar support
1.

Fit the operating valve for the pneumatic 
lumbar support. When fitting, position the 
new valve in such a way that the top (3) can 
be hooked in and then be pushed down into 
the side cover.

2.

Connect the air pipes for the operating valve 
for the pneumatic lumbar support (1).

3.

Install the side cover panel on control side.

4.

Fit the seat squab.

K1 01 657

2

1

4

3

SEATS

4-24

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Removal and installation

7

ΧΦ65/75/85 series

1

4.26 REMOVAL AND INSTALLATION, AIR BELLOWS

Removing air bellows
1.

Remove the entire seat.

2.

Remove the seat squab.

3.

Remove the clamping strip (1) (by cutting it).

4.

Disconnect the air pipe (2) from the manifold 
(3).

5.

Unscrew the screws (4) and (5) to be able to 
remove the air bellows including the air pipe.

Installing air bellows
1.

Install the air bellows (6). In doing so, make 
sure that the air bellows are not twisted. If 
this is nevertheless the case, loosen screw 
(4) a few turns and apply spring action to the 
system under pressure; then tighten screw 
(4) again while the air bellows are still under 
pressure.

2.

Tie the pipes together with a clamping strip.

3.

Fit the seat squab.

4.

Install the entire seat.

K100513

6

4

3

1

5

2

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4-25

Removal and installation

SEATS

ΧΦ65/75/85 series

1

7

4.27 REMOVAL AND INSTALLATION, ADJUSTMENT CYLINDER

Removing adjustment cylinder
1.

Remove the seat squab.

2.

Lock the seat in its highest position.

3.

Disconnect the air pipes (1) and (3) of the 
adjustment cylinder.

4.

Remove the retainer pin (4).

5.

Remove the screw (5).

6.

Push the metal plates that hold the cylinder 
apart and remove the adjustment cylinder.

Installing adjustment cylinder
1.

Push the metal plates that hold the cylinder 
apart and insert the adjustment cylinder (2).

2.

Install the retainer pin (4).

3.

Connect the air pipes (1) and (3) to the 
adjustment cylinder.

4.

Tighten the screw (5) slightly during 
installation.

5.

Release the lock and operate the height 
adjustment button (upwards). Check 
whether the cylinder (2) moves freely. If not, 
loosen screw (5) slightly.

6.

Fit the seat squab.

K100514

4

8

12

6

5

2 1

3

SEATS

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Removal and installation

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ΧΦ65/75/85 series

1

4.28 REMOVAL AND INSTALLATION, CONTROL UNIT OF THE HEIGHT CONTROL 

VALVE

Removing control unit of height control valve
1.

Remove the seat squab and remove the 
rubber dust boot at the front.

2.

Lock the system in the highest position.

3.

Disconnect the air pipe (1) from the 
cylinder (2).

4.

Remove the lock ring (3) and pin (4).

5.

Loosen the screw (5) slightly and push the 
holder (6) of the control discs (7) a little apart. 
This makes it possible to pull the control 
discs from the adjustment cylinder (8). The 
guide plate (9) must remain attached to the 
pin (10). Push the ball (11) back onto the pin 
(10) if it has come loose.

Installing control unit of height control valve
1.

Tighten the screw (5) slightly during 
installation.

2.

Operate the height adjuster (upwards) and 
check whether the cylinder moves freely. If 
not, loosen screw (5) slightly.

K100515

8

4

10

11

9

5

6

2

12

7

1

3