DAF LF45, LF55 Series. Manual — part 181

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200505

6-1

Draining and filling

BE ENGINE COOLING SYSTEM

ΛΦ45/55 series

2

3

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.

}

M201084

BE ENGINE COOLING SYSTEM

6-2

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200505

Draining and filling

3

ΛΦ45/55 series

2

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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200505

7-1

Cleaning

BE ENGINE COOLING SYSTEM

ΛΦ45/55 series

2

3

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

BE ENGINE COOLING SYSTEM

7-2

©

200505

Cleaning

3

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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M201351

P

1

2

3

M201352

P

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