DAF LF45, LF55 Series. Manual — part 202

©

200505

1-1

Safety instructions

CE ENGINE COOLING SYSTEM

ΛΦ45/55 series

2

6

1. SAFETY INSTRUCTIONS

1.1 SAFETY INSTRUCTIONS

Fuel

Diesel fuel is an extremely

flammable liquid, and must not be

exposed to naked flames or come

into contact with hot surfaces. The

diesel fuel fumes remaining in an

empty fuel tank form an extremely

explosive mixture.

When fuel system components are being

removed, some fuel will escape.

To keep this spillage to a minimum, unscrew the

tank cap to release any overpressure.

Any spilled fuel must be collected, bearing in

mind the risk of fire.

Exhaust gases
Do not run the engine in an enclosed or

unventilated area.

Make sure exhaust fumes are properly extracted.

Exhaust gases contain carbon

monoxide.

Carbon monoxide is a deadly

colourless and odourless gas,

which, when inhaled, deprives the

body of oxygen, leading to

asphyxiation. Serious carbon

monoxide poisoning may result in

brain damage or death.

Moving parts
Remain at a safe distance from rotating and/or

moving components.

Various fluids
Various oils and lubricants used on the vehicle

may constitute a health hazard.

This also applies to engine coolant, windscreen

washer fluid, refrigerant in air-conditioning

systems, battery acid and clutch fluid.

So avoid inhaling and direct contact.

Electrical short-circuit
Always disconnect the battery's earth connection

during repair or maintenance operations for

which the electric power supply is not required.

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CE ENGINE COOLING SYSTEM

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©

200505

Safety instructions

6

ΛΦ45/55 series

2

©

200505

2-1

General

CE ENGINE COOLING SYSTEM

ΛΦ45/55 series

2

6

2. GENERAL

2.1 SYSTEM DESCRIPTION, COOLING SYSTEM

The cooling system consists of a water pump, a

radiator, a header tank, an oil cooler, an air

compressor, a thermostat housing with one

thermostat and pipes.

The water pump is located below the thermostat

in the engine block.

The thermostat housing is part of the cylinder

head.

From the delivery side of the water pump, the

coolant is directed to the oil cooler via an opening

at the back of the water pump. Afterwards the

coolant flows to the cylinder block.

The coolant flows through the cylinder block,

along the cylinder liners, and up to the cylinder

head.

The coolant leaves the cylinder head through the

thermostat housing.

Depending on the coolant temperature, the

thermostat distributes the coolant flow to the

radiator or back to the water pump.

The coolant transported to the radiator enters the

radiator at the top and leaves it at the bottom.

From the bottom of the radiator, the coolant is

returned to the water pump via the return pipe.

The connection pipe to the header tank is also

connected to the return pipe from the radiator.

When the coolant heats up, it flows to the header

tank. When the coolant cools down, it will flow

back from the header tank.

The oil cooler is not only intended to cool the

lubricating oil, but also to heat it in a "cold"

engine.

From the cylinder block, some of the coolant

flows through the air compressor.

From the air compressor, the coolant is returned

to the engine block via a pipe.

The pipe which takes the coolant to the cab

heater is connected to the cylinder head. From

the heater, the coolant is returned to the water

pump via a pipe.

M201133

M201134

CE ENGINE COOLING SYSTEM

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©

200505

General

6

ΛΦ45/55 series

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