DAF CF65, CF75, CF85 Series . Manual — part 1207

©

200423

5-3

Draining and filling

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ85 series

5

5.3 DRAINING AND FILLING, COOLING SYSTEM

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 the liquid 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 fresh
air and rest.
In order to avoid damaging the
cylinder block, do not top up a warm
engine with coolant.

Draining the cooling system
1.

Turn the heater control knob to the maximum
"hot" 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). If an integrated
retarder is fitted, remove the coolant drain
plug of the heat exchanger.

5.

Flush the cooling system.

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G000181

A

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

5-4

©

200423

Draining and filling

5

ΧΦ85 series

6.

Close the drain cock (A) and fit the drain
plug (B) and, if applicable, the coolant drain
plug of the heat exchanger of the integrated
retarder.

Filling/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 up to the fill opening of the expansion
tank.

3.

Start the engine and continue to top up the
cooling system.

4.

The cooling system is auto-bleeding.
Bleeding will be audible during topping up.
Continue topping up until bleeding is no
longer audible.

5.

Close the cooling system and allow the
engine to warm up until the thermostat has
opened.

6.

Stop the engine and check the fluid level on
the transparent rear side of the expansion
tank; add more coolant if necessary.

If the vehicle is fitted with water 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 maximum "hot" 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.

7.

Then check the coolant level.

G000182

B

©

200423

5-5

Draining and filling

EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

ΧΦ85 series

5

5.4 BLEEDING THE FUEL SYSTEM

While bleeding the fuel system, fuel
will escape. Collect the fuel to avoid
the risk of fire.

Dirt in the fuel system can lead to
significant damage to pump units
and housing.

Note:
The fuel system has to be bled if it has been
opened; this can be done in two ways.

-

With the fuel lift pump

-

By pressurising the fuel tank

Bleeding using the fuel lift pump
1.

Loosen the union nut on the injector.

2.

Pump fuel out of the injector pipe with the
primer pump until no more air bubbles are
visible in the fuel.

3.

Tighten the union nut to the specified torque,
see "Technical data".

4.

Repeat points 1, 2 and 3 for the other
injectors.

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EXPLANATORY NOTES ON THE MAINTENANCE ACTIVITIES

5-6

©

200423

Draining and filling

5

ΧΦ85 series

Bleeding by pressurising the fuel tank

To prevent deformation of the fuel
tank, the delivery pressure in the fuel
tank must not exceed 0.4 bar.

1.

Remove the fuel tank cap and replace it by a
cap with an adjustable air connection.

Note:
Use a cap (without a vent) that has a
connection for a pressure reducer valve.

2.

Pressurise the tank to a maximum of 0.2 bar.

3.

Loosen the union nut on the injector.

4.

Tighten the union nut to the specified torque,
see "Technical data".

5.

Repeat points 1, 2 and 3 for the other
injectors.

Drive and chassis

i400600

1

3

0

4

2

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