DAF CF65, CF75, CF85 Series . Manual - part 434

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 200416

3-5

Inspection and adjustment

CE ENGINE INLET/EXHAUST SYSTEM

ΧΦ65/75/85 series

4

3

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.

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A

i400856

CE ENGINE INLET/EXHAUST SYSTEM

3-6

©

 200416

Inspection and adjustment

3

ΧΦ65/75/85 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.

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 200416

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Inspection and adjustment

CE ENGINE INLET/EXHAUST SYSTEM

ΧΦ65/75/85 series

4

3

3.6 CHECKING INLET UNDERPRESSURE

1.

Remove the air filter indicator from the inlet 
pipe between the air filter housing and the 
turbocharger.

2.

Connect a pressure gauge with a maximum 
rating of -100 mbar (-10 kPa) to the 
connection of the air filter indicator.

3.

Measure the inlet underpressure at full-load 
engine speed and compare the 
measurement to the specified value. See 
"Technical data".

4.

Remove the pressure gauge and fit the air 
filter indicator.

i400869

CE ENGINE INLET/EXHAUST SYSTEM

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©

 200416

Inspection and adjustment

3

ΧΦ65/75/85 series

4