DAF CF65, CF75, CF85 Series . Manual — part 232

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2-1

General

PE ENGINE COOLING SYSTEM

CF65/75/85 series

2

6

2. GENERAL

2.1 LOCATION OF COMPONENTS

Legend
1.

Thermostat housing

2.

Coolant pump

3.

Coolant filter

4.

Coolant pipe

M201118

3

2

4

1

PE ENGINE COOLING SYSTEM

2-2

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General

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CF65/75/85 series

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2.2 SYSTEM DESCRIPTION, COOLING SYSTEM

From the delivery side of the water pump (1), the

coolant is directed to the cylinder block (2) via an

opening at the back of the coolant pump.

The coolant flows through the cylinder block up to

the cylinder heads (3).

The coolant leaves the cylinder heads through

the coolant collector pipe (4) (A), which takes it to

the thermostat housing (5).

If an intarder (13) or automatic gearbox (13) is

fitted, the coolant leaving the cylinder heads flows

via the coolant collector pipe (4) (B) to the intarder

or the automatic gearbox.

From the intarder or automatic gearbox, the

coolant then flows via the coolant collector pipe

(B) to the thermostat housing (5).

Depending on the coolant temperature, the

thermostat distributes the coolant flow to the

radiator (6) or back to the coolant pump (1).

The coolant transported to the radiator enters the

radiator at the top, and leaves the radiator at the

bottom.

From the bottom of the radiator, the coolant is

returned to the coolant pump, via the coolant

return pipe.

M201279

Heater unit

Thermostat

Coolantpump

Cylinderblock

Cylinderhead

Radiator

6

1

5

12

13

15

10

8

14

3

4

2

3

9

7

11

Cylinderhead

Coolantpipe

Oilcooler

Compressor

Coolantpipe

Retarder

Automatic transmission

Coolant

filter

Non

return

valve

Auxiliary

cab heater

Reservoir

M201038

A

B

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General

PE ENGINE COOLING SYSTEM

CF65/75/85 series

2

6

The header tank (7) has four connections. On the

top of the radiator, there is a bleed pipe which is

linked to connection 3 of the header tank.

Connections 1 and 2 of the header tank are linked

to the coolant collector pipe by bleed pipes. If no

intarder or automatic gearbox is fitted, one of the

connections will be sealed.

Connection 4 enables siphoning of the coolant

between the header tank and the engine when

the coolant temperature increases.

Connection 4 is linked together with the heater

return pipe to the coolant return pipe leading to

the coolant pump.

From the cylinder block, some of the coolant

flows through the oil cooler (8). From the oil

cooler, the coolant returns to the coolant pump

through a pipe via the coolant return pipe.

From the cylinder block, some of the coolant

flows through the air compressor (9). From the air

compressor, the coolant returns to the coolant

pump via a pipe.

From the coolant collector pipe, a pipe runs to the

cab heater (11). The heater return pipe is linked

together with the header tank pipe to the coolant

return pipe leading to the coolant pump.

If a cab heater (15) s fitted, a non-return valve

(10) is fitted in the heater supply pipe. It has two

connections. Connection (1) is for the cab heater

supply pipe. Connection (2) is for the cab heater

discharge pipe.

Note:

Fit the non-return valve with the arrow pointing in

the flow direction of the coolant.

M201034

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1 2

3

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2

M201035

PE ENGINE COOLING SYSTEM

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©

200324

General

6

CF65/75/85 series

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