DAF CF65, CF75, CF85 Series . Manual - part 1192

©

 200423

3-7

Inspection and adjustment

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ85 series

5

3.8 INSPECTION AND ADJUSTMENT, DEB PLAY

1.

Remove the valve covers, see chapter 
"Removal and installation".

2.

Tighten the DEB attachment bolts to the 
specified torque, see main group "Technical 
data". 

3.

Using special tool (DAF no. 1310477), crank 
the engine in the direction of rotation until 
cylinder 1 has reached the top dead centre 
(TDC) and the valves of cylinder 6 are in 
overlap position.

4.

Use set screw (B) to set the DEB clearance 
(A) of cylinders 1, 3 and 5, see main group 
"Technical data".

5.

Then tighten set screw (B) to the specified 
torque, see main group "Technical data".

6.

Using special tool (DAF no. 1310477), crank 
the engine in the direction of rotation until 
cylinder 6 has reached the top dead centre 
(TDC) and the valves of cylinder 1 are in 
overlap position.

7.

Use set screw (B) to set the DEB clearance 
(A) of cylinders 2, 4 and 6, see main group 
"Technical data". Then tighten set screw (B) 
to the specified torque, see main group 
"Technical data". 

8.

Fit the valve covers, see chapter "Removal 
and installation".

3.9 CHECKING THE POLY-V-BELT

1.

Check the poly-V-belt for damage and signs 
of serious wear. 

B

A

i 400166

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

3-8

©

 200423

Inspection and adjustment

5

ΧΦ85 series

3.10 INSPECTION AND ADJUSTMENT, V-BELT TENSION

Inspecting the V-belt tension
1.

Check the V-belt tension of the air 
conditioning compressor drive using the 
Krikit I, special tool (DAF no. 1240442).
Check the V-belt tension of the FAX model 
steering pump drive using the Krikit II, 
special tool (DAF no. 1240443).

2.

Set the gauge to zero by depressing the 
measuring arm (1).

3.

Place the belt tension gauge on the V-belt, 
halfway between the two pulleys.

4.

Slowly depress the V-belt by means of the 
belt-tension gauge until a click is heard. 
Then remove the belt tension gauge 
carefully. Take care not to let the measuring 
arm move. 

5.

Take the reading as indicated by the position 
of the measuring arm in relation to the scale. 
Compare this reading with the 
recommended pre-tension, see "Technical 
data".

Adjust V-belt tension of air conditioning 
compressor drive
1.

Slacken the upper attachment bolt (1) of the 
compressor.

2.

Slacken the lower attachment bolt (2) of the 
compressor.

3.

Loosen the attachment bolt from the 
threaded spindle which is attached to the 
coolant pump.

4.

Shift the compressor using the lock nuts (3) 
until the correct V-belt tension is achieved, 
see "Technical data".

1

M2061

M2062

M2041

3

2

1

1

©

 200423

3-9

Inspection and adjustment

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ85 series

5

Adjusting V-belt tension of FAX model 
steering pump
1.

Slacken the central bolt (1) of the tension 
roller.

2.

Turn the adjusting bolt (2) until the V-belt 
tension is correct, see "Technical data".

3.

Tighten the central bolt (1) to the specified 
tightening torque, see "Technical data".

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

3-10

©

 200423

Inspection and adjustment

5

ΧΦ85 series

3.11 CHECKING THE COOLANT FREEZING POINT

When the coolant is hot, there is an 
overpressure in the cooling system. 
Carefully remove the filler cap to 
release the overpressure.
Do not remove the filler cap when the 
engine is running.
Coolant is a toxic fluid. Contact with 
the skin should therefore be 
avoided.
In the event of contact with the skin: 
remove with paper or a cloth, wash 
with soap and water. If irritation 
persists, consult a doctor.
If swallowed: DO NOT induce 
vomiting. Rinse mouth, drink two 
glasses of water and consult a 
doctor.
In the event of inhalation: get some 
fresh air and rest.
In order to avoid damaging the 
cylinder block, do not top up a warm 
engine with coolant.

1.

Check the anti-freeze content of the coolant. 
Fill the cooling system with anti-freeze, if this 
has not been done yet. Always use only 
coolants that meet DAF specifications.

2.

Consult the manufacturer’s instructions for 
the correct anti-freeze mixing ratio.
Preferably, use 40% anti-freeze on an 
ethylene glycol base. At this percentage, not 
only good frost protection, but also good 
corrosion protection is guaranteed. 

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M2016

C

100

0

90

10

80

20

70

30

60

40

50

50

40

60

30

70

20

80

10

90

-80

-70

-60

-50

-40

-30

-20

0

-10

0

100

2

H

Ethyleenglycol