DAF LF45, LF55 Series. Manual - part 207

©

 200505

6-1

Draining and filling

CE ENGINE COOLING SYSTEM

ΛΦ45/55 series

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6

6. DRAINING AND FILLING

6.1 DRAINING, FILLING AND BLEEDING THE COOLING SYSTEM

In order to avoid damaging the 

engine 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 temperature control knob in 

the cab to the maximum 'hot' setting.

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 radiator via 

the drain plug.

5.

Flush the cooling system.

6.

Close the drain plug.

Filling and bleeding the cooling system
1.

Turn the heater temperature control knob in 

the cab to the maximum 'hot' setting.

2.

Fill the cooling system with the specified 

coolant.

3.

Run the engine for several minutes.

4.

The cooling system is self-bleeding.

Ensure that the bleed pipe from the 

thermostat housing to the header tank is not 

kinked or pinched.

Note:

Make sure that air can escape when the 

cooling system is filled.

5.

Check the coolant level, and top up with 

coolant if necessary.

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M201084

CE ENGINE COOLING SYSTEM

6-2

©

 200505

Draining and filling

6

ΛΦ45/55 series

2

©

 200505

7-1

Cleaning

CE ENGINE COOLING SYSTEM

ΛΦ45/55 series

2

6

7. CLEANING

7.1 CLEANING THE EXTERIOR OF RADIATOR AND AIR COOLER

Inhalation of dust may have serious 

consequences for your health.

Take the necessary precautions, 

such as wearing goggles and a 

facemask.

Note:

With the aid of a simple tool, the radiator and the 

air cooler can be blow-cleaned.

The tool (radiator cleaner) cannot be ordered 

from DAF. It should be manufactured by yourself 

according to the drawing.

Key to drawing:

}

100mm

5mm

2

1150mm

2

4

3

5

5

4

1

1

M2108

1

Solder up

2

Solder

3

Quick-release coupling for air hose

4

Steel pipe, 

 10 mm

5

6  x 

 1.5 mm between holes, with a 

centre-to-centre distance between the 

holes of 7 mm, drilled on one side

CE ENGINE COOLING SYSTEM

7-2

©

 200505

Cleaning

6

ΛΦ45/55 series

2

1.

If the vehicle has air conditioning, loosen the 

support of the refrigerant pipes (1) on the 

radiator and remove the condenser from the 

air cooler supports. Push the condenser as 

far as possible forwards.

2.

Insert the radiator cleaner (3) between the air 

cooler (1) and radiator (2) from underneath, 

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

3.

Apply air pressure to the radiator cleaner (3) 

and continue blow-cleaning the air cooler (1) 

until no more dirt comes out.

4.

Turn the radiator cleaner (3) over, turning the 

holes towards the radiator (2), and blow-

clean the radiator (2).

5.

If the vehicle has air conditioning, fit the 

condenser in the air cooler supports and 

tighten the support of the refrigerant pipes 

(1) on the radiator.

i400824

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1

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3

M201351

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1

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3

M201352

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