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.
5
©
0008