DAF LF45, LF55 Series. Manual - part 210

©

 200505

2-3

General

CE ENGINE LUBRICATION SYSTEM

ΛΦ45/55 series

2

7

Cylinder head
From the main oil channel, vertical oil channels 

pass through the cylinder block to the cylinder 

head. This bore is continued in the cylinder head 

to supply lubricating oil to the rockers.

Piston and gudgeon pin
The pistons are lubricated by oil nozzles (B). 

In addition to its lubricating function, the 

lubricating oil has an important cooling function.

A hole has been drilled at the top of the 

connecting rod, through which the oil that the oil 

nozzles spray against the piston head may reach 

the upper big-end bearing and the gudgeon pin.

Turbocharger
The turbocharger is lubricated via an oil pipe from 

the oil cooler housing.

The oil discharge pipe from the turbocharger is 

connected to the cylinder block, from where the 

oil returns to the oil sump.

Air compressor
The air compressor is supplied with oil from an oil 

channel in the timing gear case connected to the 

main oil channel.

The oil returning from the air compressor flows 

from the front of the air compressor to the timing 

gear case, and from there to the oil sump.

M201123

M201122

CE ENGINE LUBRICATION SYSTEM

2-4

©

 200505

General

7

ΛΦ45/55 series

2

©

 200505

3-1

Checking and adjusting

CE ENGINE LUBRICATION SYSTEM

ΛΦ45/55 series

2

7

3. CHECKING AND ADJUSTING

3.1 CHECKING ENGINE OIL CONSUMPTION

Engine oil consumption relates to the engine oil 

used during combustion in the engine. Since 

engine oil consumption is affected by driving style 

and the use to which the vehicle is put, it is also 

related to average fuel consumption. See 

"Technical data" for the maximum permissible 

engine oil consumption.

Test conditions
1.

An engine oil consumption test is only 

meaningful after the engine has been run in 

(approx. 25,000 km).

2.

Check the engine carefully for engine oil 

leakage before carrying out an engine oil 

consumption test. First repair any leaks.

3.

Check the average fuel consumption and 

engine oil consumption as accurately as 

possible.

4.

Only check the engine oil level when the 

engine is at operating temperature and only 

when the engine has been turned off for five 

minutes.

5.

Make sure the vehicle is horizontal before 

checking the engine oil level.

CE ENGINE LUBRICATION SYSTEM

3-2

©

 200505

Checking and adjusting

7

ΛΦ45/55 series

2

3.2 INSPECTION, LUBRICATING OIL PRESSURE

1.

Bring the engine up to operating 

temperature.

2.

Remove the plug from the main oil channel. 

It is located on the left, in the centre of the 

engine block.

3.

Connect the special tool (DAF no. 0535551) 

to the oil pressure gauge connection.

4.

Start the engine and measure the lubricating 

oil pressure at idling speed and at full-load 

engine speed.

Compare the pressure readings with the 

technical data. See "Technical data".

5.

Stop the engine and remove the oil pressure 

gauge. Fit a new sealing ring in the plug and 

insert the plug.

M201150