DAF 95XF. Manual - part 416

4

XE ENGINE FUEL SYSTEM

Inspection and adjustment

95

XF series

3-8

3.6

CHECKING THE GALLERY PRESSURE

Fuel is released when the gallery
pressure is checked. This fuel must
be collected, bearing in mind the
risk of fire.

Any dirt in the system may cause
severe damage to the pump units
and the pump housing.

1.

Place a tray beneath the fuel fine filter to
capture any escaping fuel.

2.

Remove the banjo bolt (1) from the head of
the fuel fine filter.

3.

Connect an attenuated fluid-type pressure
gauge with a range of 0 - 10 bar to the
cleared connection.

4.

Note:
To allow the gallery pressure to be checked
at starting speed, the fuses of the
UPEC-engine management system should
be removed before and after contact in the
central box. This is done to prevent the
engine from picking up and to avoid error
messages.

Successively check the gallery pressure at
idling, full-load and starting speed and
compare the measured values with the
values specified, see main group “Technical
data”.

5.

Remove the pressure gauge and fit the
banjo bolt, tightening it to the specified
torque, see main group “Technical data”.

6.

Bleed the fuel system.

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4

95

XF series

Inspection and adjustment

XE ENGINE FUEL SYSTEM

3-9

3.7

INSPECTION OF FUEL LIFT PUMP SEALING RINGS

1.

Check via the pressure-relief space (2) at
the bottom of the fuel lift pump (1) whether
there are any leaks through the sealing
rings.

2.

In the event of leaks via sealing ring (A),
there is fuel in the pressure-relief space.
Any leaks via sealing ring (B) mean that
there is engine lubricating oil in the
pressure-relief space.

3.

Check the fuel tank for air bubbles when the
engine is running. A leak via sealing ring (A)
may result in air getting into the fuel system
and ultimately into the tank via the fuel
return pipe.

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3

B

A

2

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4

XE ENGINE FUEL SYSTEM

Inspection and adjustment

95

XF series

3-10

3.8

INSPECTION OF RACOR FILTER ELEMENT

1.

Check the reservoir for the presence of
water.

2.

If necessary, drain the water via plug (2)
using the fuel lift pump (1).

1

2

3

4

5 

7

6

8

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4

95

XF series

Removal and installation

XE ENGINE FUEL SYSTEM

4-1

4.  REMOVAL AND INSTALLATION

4.1

REMOVAL AND INSTALLATION OF INJECTION LINES

Always leave the injection lines
fixed together, as a complete set.
Never remove or shift the clamping
brackets (A) holding the lines
together. Never bend injection lines
as they may crack.

Removing the injection lines
1.

Clean the unions and the area surrounding
the injectors and the pump housing.

2.

Note:
When slackening the injection-line unions,
hold the injector’s side connection back
using an open-end spanner.

Slacken the unions from the injection lines
on the injector side.

3.

Slacken the unions from the injection lines
on the pump housing side.

4.

Immediately plug the openings.

5.

Remove the injection lines.

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A

A

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