DAF LF45, LF55 Series. Manual — part 183

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200505

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Safety instructions

BE ENGINE LUBRICATION SYSTEM

ΛΦ45/55 series

2

4

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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©

200505

Safety instructions

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ΛΦ45/55 series

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©

200505

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General

BE ENGINE LUBRICATION SYSTEM

ΛΦ45/55 series

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4

2. GENERAL

2.1 SYSTEM DESCRIPTION, LUBRICATION SYSTEM

General
The lubricating oil pump (1) is directly driven by

the crankshaft via an idler gear.

The lubricating oil pump draws the oil from the oil

sump and pumps it via the oil cooler (2) and the

lubricating oil filter (3) to the main oil channel in

the cylinder block. From the main oil channel, the

lubricating oil is further distributed to the various

components requiring lubrication.

Oil cooler
The oil cooler (2) is connected to the cooling

system. The oil cooler warms up the lubricating

oil in a "cold" engine and cools it in a "warm"

engine.

M201120

B

A

B

A

C

E

F

D

5

E

F

F

A

D

5

3

5

2

4

1

A

From lubricating oil pump

B

To oil cooler

C

To lubricating oil pump

D

From oil cooler

E

To oil filter

F

To main oil channel

BE ENGINE LUBRICATION SYSTEM

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200505

General

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ΛΦ45/55 series

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Pressure-limiting valve
A pressure limiting valve (4) is fitted in the oil

cooler housing.

When the pressure set for the pressure limiting

valve has been reached, the valve opens and

allows the excess lubricating oil to be discharged

to the supply side of the lubricating oil pump.

Oil filter
The oil is cleaned in the disposable oil filter (3). A

pressure relief valve (5) fitted in the oil cooler

housing opens if the pressure in the filter

becomes too high as a result of contamination or

cold oil. The oil then passes through the filter

unfiltered.

Main oil channel
From the main oil channel, lubricating oil is

supplied to the crankshaft main bearings (A) and

via an oil channel in the crankshaft also to the big-

end bearings.

From the main oil channel, lubricating oil is

pumped to the camshaft.

M201260

A

B