DAF LF45, LF55 Series. Manual — part 327

©

200416

3-5

Inspection and adjustment

CE ENGINE INLET/EXHAUST SYSTEM

ΛΦ45/55 series

4

6

3.5 INSPECTION AND PRESSURE-TESTING, AIR INLET SYSTEM

When pressure-testing the air inlet

system, the plugs may spring off if

they are not properly secured. It is

therefore important to check the

attachment of the plugs before

pressure-testing and keep people

away from the area.

1.

Check the condition and mounting of the air

inlet channels/pipes of the air inlet system.

Note:

In case of doubt as to the proper sealing of

the air inlet system, which is indicated by the

following:

- loss of power

- high fuel consumption

- unusual noises

- lit engine fault symbol on the instrument

panel, ???carry out a pressure test to check

the air inlet system for leakage.

2.

Remove the right-hand and rear engine

encapsulations.

3.

Loosen the inlet hose between the air cooler

and the inlet manifold at the inlet manifold

side.

4.

Fit the special tool (DAF no. 1453171) in the

hose.

}

A

i400856

CE ENGINE INLET/EXHAUST SYSTEM

3-6

©

200416

Inspection and adjustment

6

ΛΦ45/55 series

4

5.

Loosen the plastic pipe between the air filter

housing and the rubber suction hose on the

turbocharger.

6.

Install special tool (DAF no. 0694831) in the

rubber intake port on the turbocharger.

7.

Connect an air pipe with reducer valve to the

sealing cap (A) and charge the system to

approx. 1 bar.

8.

Use a soapy solution to check the whole inlet

system for air leaks. Also check whether the

pressure gauge of the reducer valve drops.

9.

Fit the loosened hoses of the inlet system

and the engine encapsulation.

i 400376

©

200416

3-7

Inspection and adjustment

CE ENGINE INLET/EXHAUST SYSTEM

ΛΦ45/55 series

4

6

3.6 CHECKING INLET UNDERPRESSURE

1.

Remove the connection of the air intake pipe

underpressure indicator (1) from between

the air filter housing and turbocharger.

2.

Connect a pressure gauge with a maximum

rating of -100 mbar (-10 kPa) to the

connection of the underpressure indicator.

3.

Measure the inlet underpressure at full-load

engine speed and compare the

measurement to the specified value. See

"Technical data".

4.

Fit the connection of the air intake pipe

underpressure indicator (1) between the air

filter housing and turbocharger.

i400514

1

CE ENGINE INLET/EXHAUST SYSTEM

3-8

©

200416

Inspection and adjustment

6

ΛΦ45/55 series

4