DAF CF65, CF75, CF85 Series . Manual - part 267

©

 200324

6-1

Draining and filling

XE ENGINE COOLING SYSTEM

CF65/75/85 series

2

9

6. DRAINING AND FILLING

6.1 DRAINING, FILLING AND BLEEDING THE COOLING SYSTEM

}

In order to avoid damaging the 

cylinder block, do not top up a warm 

engine with cold coolant. Coolant is 

a toxic fluid and must be handled 

with care. Protect skin and eyes. 

Coolant is harmful to the 

environment; after use, it should be 

processed as industrial chemical 

waste. When the coolant is hot, there 

is overpressure in the cooling 

system. When removing the filler 

cap, allow the overpressure to 

escape by first loosening the filler 

cap one turn.

Draining the cooling system
1.

Turn the heater control knob to the 

"warmest" temperature setting. As a result, 

the heater valve will be fully opened.

2.

Remove the cooling system filler cap.

3.

Collect the coolant. Position suitable 

containers under the drain points.

4.

Drain the cooling system at the cylinder 

block via the drain cock (A) and the radiator 

via the drain plug (B).

5.

Flush the cooling system.

6.

Close the drain tap (A) and fit the drain 

plug (B).

Note:

The cooling system is auto-bleeding.

Filling and bleeding cooling system
1.

Turn the heater temperature control knob in 

the cab to the "warmest" setting.

2.

Fill the cooling system with the specified 

coolant.

3.

Run the engine for several minutes.

4.

Ensure that the air bleed pipe from the 

thermostat housing to the header tank is not 

twisted or pinched.

5.

Check the coolant level, and top up with 

coolant if necessary.

A

B

M200556

XE ENGINE COOLING SYSTEM

6-2

©

 200324

Draining and filling

9

CF65/75/85 series

2

If the vehicle is equipped with a water/air cab 
heater:
1.

Run the engine at idling speed.

2.

Switch on the cab heater, using the rocker 

switch on the dashboard.

3.

Turn the heater temperature control knob in 

the cab to the "warmest" setting.

4.

Switch on the heater fan.

5.

Set the rocker switch on the thermostat in the 

cab to position 1.

Note:

Combustion will start after approximately 

one minute.

6.

Allow the cab heater to operate for 

approximately 15 minutes.

©

 200324

7-1

Cleaning

XE ENGINE COOLING SYSTEM

CF65/75/85 series

2

9

7. CLEANING

7.1 CLEANING THE EXTERIOR OF RADIATOR/AIR COOLER

}

Inhalation of dust may have serious 

consequences for your health. Take 

the necessary precautions, such as 

wearing goggles and a face mask.

Cleaning wire mesh
1.

Remove the lower grille.

2.

Remove the wire mesh.

3.

Clean the wire mesh.

Cleaning, radiator/air cooler
With the aid of a simple tool, the radiator and the 

air cooler can be blow-cleaned.

This tool can be made in your own workshop. It 

cannot be ordered from DAF.

Key to drawing:

1.

Solder up

2.

Solder

3.

Quick-release coupling for air hose

4.

Steel pipe, ø 10 mm

5.

6 x ø 1.5 mm between holes, with a centre-

to-centre distance between the holes of 7 

mm, drilled on one side.

Note:

Make sure that the air cooler and radiator 

element are not damaged when positioning the 

radiator cleaner.

1.

From below, insert the radiator cleaner (4) 

between the air cooler (1) and radiator (2), 

with the air holes facing the air cooler (1).

2.

Apply air pressure to the radiator cleaner (4) 

and continue blow-cleaning the air cooler (1) 

until no more dirt comes out.

100mm

5mm

2

1150mm

2

4

3

5

5

4

1

1

M2108

1

2

3

4

M2109

P

XE ENGINE COOLING SYSTEM

7-2

©

 200324

Cleaning

9

CF65/75/85 series

2

3.

Turn the radiator cleaner over, turning the 

holes towards the radiator (2), and blow-

clean the radiator (2).

4.

Fit the wire mesh.

5.

Install the lower grille.

1

2

3

4

M2110

P