DAF CF65, CF75, CF85 Series . Manual — part 1129

©

200518

3-25

Inspection and adjustment

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ65/65 (II) series

5

3.26 INSPECTION AND ADJUSTMENT, LOAD-DEPENDENT CONTROL VALVE,

LEAF SUSPENSION

Explanatory notes on instruction plate
for CF65

This plate is mounted on the rear door pillar of the

vehicle. The data on axle loads and delivery

pressures are listed on the instruction plate in the

sequence of the axles beneath the vehicle.

"1" refers to the (first) front axle, "2" to the

following axle, etc.

If the vehicle is fitted with a relay valve in the front

axle brake circuit, the box beneath the valve

illustration will be blank. Throughout the column,

a value of 8.1 bar has been filled in for "delivery

pressure p2" under axle "1".

If the vehicle is equipped with a control valve

instead of the relay valve mentioned, the box will

contain a pressure ratio, e.g. "i = 1 : 1.5". The

"delivery pressure p2" of axle "1" then indicates

variable readings.

These values can be used to check the brake

pressure values of the front axle and to carry out

the inspection/adjustment below at the same

time. To do this, connect a pressure gauge to the

test connection of one of the front axle brake

cylinders.

AUTOM. LASTAFHANKELIJKE REMKRACHTREGELING
AUTOM. LOAD SENSING DEVICE
AUTOM. LASTABHAENGIGE BREMSKRAFT REGELEINR.
DISPOSITIF DE CORRECTION AUTOM. DE FREINAGE
REGOLATORE AUTOM. DELLA FORZA FRENANTE
REGULADOR AUTOM. DEL ESFUERZO DE FRENANDA

TYPE - TIPO : FA

1425287

2

1.8

2.0

3.0

4.0

8.0

10.0

11.5

13.0

2

1.8

1.8

2.2

3.1

6.4

7.6

8.2

8.2

1

5.7

5.7

5.8

6.1

7.4

7.8

8.0

8.0

1

ASLAST G

AXLE LOAD

ACHSLAST

CHARGE SOUS ESSIEU

CARICO ASSE

CARGA EJE

x10

4

N

UITGESTUURDE DRUK p2

DELIVER

Y PRESSURE

AUSGESTEUER

TER DRUCK

PRESSION DELIVREE

PRESSIONE USCIT

A

PRESION DE SALIDA

bar

BALG DRUK p3

PRESSURE BELLOWS

BALG DRUCK

PRESSION COUSSIN

PRESS. CUSCINI ARIA

PRESION FUELLES

bar

±0.4

±0.2

W475 721 004 0

1396041

i = 1 : 1.5

MEEREGEL

VENTIEL

EMPTY

-LOAD V

A

LV

E

LAST

-LEER VENTIEL

V

A

LVE CHARGE-VIDE

V

A

LVOLA VUOTO-CARICO

V

A

LVULA V

ACIO-CARGA

p1 = > 8.5 bar

p4 = 8.0 bar

L = 140 mm

a = 15 ±2

G=11.0

L

p1

p2

p4

R600479

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

3-26

©

200518

Inspection and adjustment

5

ΧΦ65/65 (II) series

Explanatory notes on instruction plate for
CF65 (II)

This plate is mounted on the rear door pillar of the

vehicle. The data relating to axle loads and output

pressures are listed on the instruction plate

following the sequence of the axles beneath the

vehicle.

So "1" is the front axle and "2" the rear axle.

"G" stands for the load in kg.

These values can be used to check the brake

pressure values of the front axle and to carry out

the inspection/adjustment below at the same

time. To do this, connect a pressure gauge to the

test connection of one of the front axle brake

cylinders.

Inspection and adjustment, load-dependent
control valve, leaf suspension
1.

Measure the weight plus load of the rear

axle(s).

2.

Check the attachment of the control lever

and its ease of operation.

3.

Check whether the correct valve and the

correct springs have been fitted (for

information, see the instruction plate).

4.

Check the length of the control lever

(see "L" on the instruction plate).

5.

Connect pressure gauge (4) to the test

connection close to connecting point

 on

the load-dependent control valve (input

pressure).

6.

Connect pressure gauge (2) to the test

connection on one of the brake cylinders

(service brake connection) of the rear axle.

7.

Make sure that the reservoir pressure is

higher than 8.5 bar throughout the testing

process.

8.

Depress the brake pedal until the pressure

gauge (4) indicates a value of 8 bar.

R600944

1/4

4

2

2

R600562

1

©

200518

3-27

Inspection and adjustment

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ65/65 (II) series

5

9.

Read the brake pressure of the rear axle

from pressure gauge 2 and check that this

value matches the one listed on the

instruction plate in the table under "output

pressure p2" to the rear axle.

10. Correct, if necessary, the brake pressure by

moving the rubber sleeve (1) in relation to the

vertical connecting rod. On no account

change the length L of the (horizontal)

control lever.

11. Remove the rubber sleeve (2) and move the

control lever towards maximum load. Check

that the output pressure is now allowed

through (almost) without reduction.

Note:

The small socket head screw in the centre of the

valve must not be adjusted.

Drive and chassis

L

R600781

1

2

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

3-28

©

200518

Inspection and adjustment

5

ΧΦ65/65 (II) series

3.27 CHECKING THE DIFFERENTIAL FOR LEAKS

1.

Visually inspect the differential for leaks.

3.28 CHECKING THE OPERATION OF THE DIFFERENTIAL LOCK

1.

Jack up the rear axle and support the axle on

stands.

2.

Bring the air system to operating pressure.

3.

Engage the differential lock. The warning

indicator should now be active.

4.

Check that there is a "rigid" connection

between the driven wheels.

5.

Disengage the differential lock. The warning

light should now go out and the "rigid"

connection between the driven wheels

should be broken.