DAF LF45, LF55 Series. Manual — part 237

©

200508

3-3

Inspection and adjustment

PNEUMATIC GEARBOX CONTROL

ΛΦ45/55 series

3

3

3.3 INSPECTION, DOWNSHIFT PROTECTION VALVE

Inspection without vehicle speed signal
1.

Make sure there is sufficient air pressure in

the brake system.

2.

Position the gear lever in neutral.

3.

Switch the vehicle ignition on.

4.

Use the range group operating switch on the

ball of the gear lever to select the lower

range. The range group should now switch to

the lower range.

5.

Switch the vehicle ignition off. The range

group should now automatically switch to the

higher range.

Inspection with the vehicle speed signal
1.

Make sure there is sufficient air pressure in

the brake system.

2.

Connect special tool DELSI

(DAF no. 0694941).

3.

Position the gear lever in neutral.

4.

Switch the vehicle ignition on.

5.

Use the range group operating switch on the

ball of the gear lever to select the lower

range. The range group should now switch to

the lower range.

V300425

PNEUMATIC GEARBOX CONTROL

3-4

©

200508

Inspection and adjustment

3

ΛΦ45/55 series

3

6.

Use DELSI to raise the simulated vehicle

speed slowly to approximately 40 km/h. As

the vehicle speed increases, the range group

should automatically switch to the higher

range.

7.

Use DELSI to decrease the simulated

vehicle speed slowly to approximately

0 km/h. As the vehicle speed decreases, the

range group should automatically switch to

the lower range.

V300426

©

200508

3-5

Inspection and adjustment

PNEUMATIC GEARBOX CONTROL

ΛΦ45/55 series

3

3

3.4 INSPECTION, FILTER/GOVERNOR

Inspection, filter/governor
1.

Remove the plug from the extra outlet (9)

and install a pressure gauge.

2.

Check the service pressure. See "Technical

data".

6
5
4

3

2

1

10

9

8

V300430

7

PNEUMATIC GEARBOX CONTROL

3-6

©

200508

Inspection and adjustment

3

ΛΦ45/55 series

3