DAF 95XF. Manual - part 393

4

XF ENGINE FUEL SYSTEM

Removal and installation

95

XF series

4-8

12. Install a new clamping bolt (1). Tighten the

clamping bolt (1) to the specified torque,
see main group “Technical data”.

13. Check the clutch plates for cracking and

whether they have been installed
stress-free. If there is stress on the clutch
plates, they will be ‘convex’ or ‘concave’.
Check using a steel measuring rod.

14. Adjust the injection timing, see chapter

“Checking and adjusting”.

15. Install the stop control and check its setting.

16. Install the oil supply and return lines.

17. Fit the injection lines.

18. Install the smoke limiter pipe.

19. Install all fuel supply and return lines.

20. Install the valve cover of cylinders 4, 5

and 6.

i 400184

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95

XF series

Removal and installation

XF ENGINE FUEL SYSTEM

4-9

4.5

REMOVAL AND INSTALLATION OF FUEL PIPES

1.

Cut off the pipe behind the nipple or banjo
union. Remove the section of pipe from the
nipple or banjo union, by heating. Never
remove the nipple or banjo union by making
an incision in the longitudinal direction of
the pipe. This could easily result in damage
to the hose adapter. Even minor damage to
the hose adapter will cause leakage.

2.

It is not permitted to fit a nipple or banjo
union to the same pipe end more than once.
If a nipple or banjo union were fitted to the
same pipe end more than once, this could
result in bad sealing.

3.

Cut off the pipe end if it has been used
before. If shortening the pipe results in a
sharp curve in the pipe or if it makes the
pipe too short, the pipe will have to be
extended or a new pipe will have to be
fitted.

4.

Always install nipples and banjo unions in
plastic pipes with the special tool
(DAF no. 0694829).

5.

Clamp the plastic pipe in the special tool.

6.

Note:
Never heat a plastic pipe when fitting
nipples or banjo unions.

Use a plastic mallet to tap the nipple or
banjo union into the pipe.

W602009

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4

XF ENGINE FUEL SYSTEM

Removal and installation

95

XF series

4-10

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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95

XF series

Removal and installation

XF ENGINE FUEL SYSTEM

4-11

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 00 003

C 9 00 004

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