DAF 95XF. Manual - part 420

4

XE ENGINE FUEL SYSTEM

Removal and installation

95

XF series

4-14

Leaks from fuel pipes must be
remedied as soon as possible to
prevent fire risk.

In the event of a leakage from a pipe coupling,
unlimited tightening of the union nut is not
permitted.

1.

First check whether the leak is at the
connection point between the pipe and
coupling or at the connection point between
coupling and the component housing.

2.

The union nut may be tightened a further
half turn (180

°

) only once. Tightening the

union nut further than this is possible, but
entails the risk of excessive deformation of
the thrust washer and the pipe, which would
seriously weaken the pipe.

3.

If the leakage has not stopped after the
union nut has been tightened, it will be
necessary to take the coupling apart.

4.

Check the parts for deposits and/or
damage. Even a small longitudinal scratch
on the pipe adapter of a nipple or a banjo
union may be sufficient to cause a leak.

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4

95

XF series

Removal and installation

XE ENGINE FUEL SYSTEM

4-15

When pipes touch each other or other parts of
the vehicle, they may get chafed.

1.

Pipes showing evidence of wear must be
replaced without delay.

2.

When pipes are fitted close together or
close to other parts of the vehicle, they
should be secured to prevent chafing.

3.

Secure pipes with the specially developed
pipe clips. These pipe clips are available for
pipes with a diameter of 6, 10 and 22 mm.
The pipe clips can be joined together.

Clip diameter

DAF no.

6

0761460

10

0761462

22

0761461

4.

Chafing can sometimes be prevented by
releasing an elbow or T-piece and then
tightening it in a slightly different position.

5.

Note:
Do not over tighten the cable ties, or the
pipes may be forced shut.

Secure the pipes with cable ties.

C 9 00 004

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4

XE ENGINE FUEL SYSTEM

Removal and installation

95

XF series

4-16

4.8

REMOVAL AND INSTALLATION OF FUEL FINE FILTER

When the fuel fine filter is removed,
a quantity of fuel will escape. This
fuel must be collected, bearing in
mind the risk of fire.

Removing the fuel fine filter
1.

Place a tray beneath the filter to collect any
escaping fuel.

2.

Remove the filter by turning it
counter-clockwise.

Note:
The fuel fine filter is a disposable filter, and
must neither be cleaned nor reused.

Installing the fuel fine filter
1.

Fill the new fuel fine filter with clean diesel
fuel.

2.

Lightly lubricate the sealing ring with engine
oil.

3.

Fit the filter until the sealing ring abuts and
then tighten the filter by hand another 

1

/

2

 to

3

/

4

 turn.

4.

Bleed the fuel system, if necessary. See
chapter “Inspection and adjustment”.

5.

Start the engine and check for leaks.
Manually re-tighten the filter, if necessary.

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4

95

XF series

Removal and installation

XE ENGINE FUEL SYSTEM

4-17

4.9

REMOVAL AND INSTALLATION OF FUEL COARSE FILTER

When the fuel coarse filter is
removed, a quantity of fuel will
escape. This fuel must be collected,
bearing in mind the risk of fire.

Removing the fuel coarse filter
1.

Place a tray beneath the filter to collect any
escaping fuel.

2.

Remove the cover by turning it
counter-clockwise.

3.

Remove the coarse filter (1).

4.

Check the sealing ring (2) for damage. In
case of damage, the sealing ring must be
replaced.

Installing the fuel coarse filter
1.

Apply a thin layer of acid-free grease to the
sealing ring.

2.

Fit the cover together with the coarse filter
by fingertightening the cover.

3.

Bleed the fuel system, if necessary. See
chapter “Inspection and adjustment”.

4.

Start the engine and check for leaks.
Manually re-tighten the filter, if necessary.

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1

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