DAF CF65, CF75, CF85 Series . Manual — part 237

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5-5

Removal and installation

PE ENGINE COOLING SYSTEM

CF65/75/85 series

2

6

5.4 REMOVAL AND INSTALLATION, VISCOUS FAN CLUTCH

Removing the viscous fan clutch
1.

Remove the front engine encapsulation.

2.

Loosen the wind tunnel collar by removing

the retaining screw (G) and turn the wind

tunnel collar towards the radiator.

3.

Remove the fan from the viscous fan clutch

and place it temporarily in the wind tunnel.

Note:

The viscous fan must always be stored

vertically.

4.

Remove the viscous fan clutch from the drive

flange.

Installing the viscous fan clutch
1.

Install the viscous fan clutch on the drive

flange and tighten the attachment bolts to the

specified torque. See "Technical data".

2.

Fit the fan to the viscous fan clutch. Tighten

the attachment nuts to the specified

tightening torque. See "Technical data".

3.

Turn the wind tunnel collar towards the

engine and check whether it is installed

properly all round in its lock. Fit the locking

screw (G).

4.

Fit the front engine encapsulation.

M201032

H

J

G

F

PE ENGINE COOLING SYSTEM

5-6

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Removal and installation

6

CF65/75/85 series

2

5.5 REMOVAL AND INSTALLATION, RADIATOR UNIT

Removing the radiator unit
1.

Drain the coolant.

2.

Disconnect the torque rods (H).

3.

Remove the air inlet hoses (F) between the

engine and the air cooler.

4.

Remove the locking screws from the wind

tunnel collar (G) and turn the latter inwards.

5.

Disconnect the air-conditioning condenser (if

fitted) including accessories from the radiator

unit.

6.

Disconnect the air-conditioning compressor

from the engine and carefully put the

complete air-conditioning system to one

side.

7.

Disconnect the rubber hoses from the

radiator unit.

8.

Disconnect the oil filler pipe from the radiator

unit.

9.

Disconnect the radiator unit and remove the

assembly with the air cooler.

Installing the radiator unit
1.

Fit the radiator unit together with the air

cooler.

2.

Fit the oil filler pipe to the radiator unit.

3.

Fit all rubber hoses to the radiator unit.

4.

Fit the air-conditioning condenser (if present)

including accessories to the radiator unit.

5.

Fit the air-conditioning compressor to the

engine.

6.

Turn the wind tunnel collar (G) outwards and

fit the locking screws.

7.

Remove the air inlet hoses (F) between the

engine and the air cooler.

8.

Fit the torque rods (H).

9.

Fill the cooling system.

M201032

H

J

G

F

M201032

H

J

G

F

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6-1

Draining and filling

PE ENGINE COOLING SYSTEM

CF65/75/85 series

2

6

6. DRAINING AND FILLING

6.1 DRAINING, FILLING AND BLEEDING THE COOLING SYSTEM

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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 via the drain tap (A)

on the side of the cylinder block and via drain

plug B underneath the radiator and plug C on

the lower side of the oil cooler.

5.

If an integrated retarder has been fitted

remove the coolant hose (D) from the oil

cooler and drain the remaining coolant.

6.

Flush the cooling system.

7.

Close the engine drain tap (A) and install the

drain plugs (B and C) on the lower side of the

radiator and on the oil cooler.

M2097

A

B

C

D

M2077

PE ENGINE COOLING SYSTEM

6-2

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Draining and filling

6

CF65/75/85 series

2

Filling and bleeding cooling system
1.

Turn the heater temperature control knob in

the cab to the "warmest" setting.

2.

With the cab in the driving position, fill the

cooling system with the specified coolant up

to the edge of the filler opening.

3.

Run the engine for several minutes.

Note:

The cooling system is auto-bleeding.

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.

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.