DAF 95XF. Manual - part 400

4

XF ENGINE INLET AND EXHAUST SYSTEM

Inspection and adjustment

95

XF series

3-6

Checking procedure following plotting of a
boost pressure curve
-

Check the injection timing. Adjust or
optimise, if necessary.

-

Check the fuel system for the presence
of air.

-

Replace/clean the air filter element.

-

Check the setting of the wastegate on the
turbocharger (if present).

-

Check the exhaust brake butterfly valve for
correct operation.

-

Check the inlet air cooler exterior for dirt
deposits.

-

Visually check the low-pressure fuel pipes
for leaks and correct installation.

-

Clean the water separator (if fitted).

-

Replace the fuel filter.

-

Replace/clean the fuel prefilter (if present).

-

Check the suction pipe of the tank for
clogging by large pieces of foreign matter.

-

Check the fuel tank for contamination.
Clean the tank with a steam cleaner, if
necessary.

-

Check the air inlet system for any leaks.

-

Check the exhaust system for any leaks.

-

Check the exhaust system for blockages by
measuring the exhaust back pressure.

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4

95

XF series

Inspection and adjustment

XF ENGINE INLET AND EXHAUST SYSTEM

3-7

-

Check the turbocharger wheels on the
compressor and turbine side for damage
and for deposits of salt or any other
contaminants.

-

Check the banjo bolt strainer in the fuel lift
pump for dirt (if fitted).

-

Check the valve and DEB play.

-

Check the injection lines for damage.

-

Check the fuel pump gallery pressure.

-

Check the discharge pump pressure.

-

Check whether components of the right type
have been fitted (fuel pump, turbocharger,
injectors etc.)

-

Check the opening pressure of the injectors.

-

Clean the nozzle openings using calibrated
injector needles (DAF no. 1329371).

-

Remove the fuel pump from the engine.

-

Check the fuel pump setting on a fuel pump
test bench.

3

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4

XF ENGINE INLET AND EXHAUST SYSTEM

Inspection and adjustment

95

XF series

3-8

3

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4

95

XF series

Removal and installation

XF ENGINE INLET AND EXHAUST SYSTEM

4-1

4.  REMOVAL AND INSTALLATION

4.1

REMOVAL AND INSTALLATION OF TURBOCHARGER

If the turbocharger to be replaced
was damaged to such an extent that
parts of the turbocharger are
missing or that lubricating oil has
entered the inlet system, the inlet
and exhaust systems must be
cleaned and inspected thoroughly
in order to prevent serious damage
to the engine.

Removing the turbocharger
1.

Remove the heat shields (1) from the
turbocharger.

2.

Remove the air inlet hose (2) between the
turbocharger and the air filter.

3.

Remove the exhaust brake (3).

4.

Disconnect the connector pipe (4) from the
turbocharger and the air inlet pipe to the
intercooler.

5.

Remove the turbocharger lubricating pipes.
Plug the openings.

6.

Remove the fixing nuts from the
turbocharger.

7.

Remove the turbocharger from the exhaust
manifold.

Installing the turbocharger
1.

Before installing the turbocharger, check the
following:
-

turbocharger shaft must rotate freely;

-

turbocharger shaft must not be out of
true;

-

turbocharger shaft must have little
radial clearance.

If applicable:
-

movement of the wastegate.

i 400208

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3

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