33
EN
G
L
IS
H
Changing the fuel pre-filter
Only proceed with the engine stopped and at a low temperature
Remove the pre-filter by
unscrewing it.
Check that the new filter has
performance levels that satisfy
the needs of the engine (e.g. by
comparing them with the old
one).
Damp the new filter seal with
diesel or engine oil.
Hand screw the new filter into
place until the seal gasket
touches the support, then lock
by a further 3/4 of a turn.
Loosen the bleeder screw (2)
on the pre-filter support and
activate the hand pump (1)
until the supply circuit is full. Ensure that any fuel coming out is not
dispersed into the environment.
Lock the bleeder screw tightly.
Start the engine and run it at minimum speed for a few minutes to
eliminate any residual air.
NOTE
: should it be necessary to accelerate the bleeding phase, the
hand pump can be used during start-up.
Check tension and state of the auxiliary member
drive belt
Only proceed with the engine stopped and at a low temperature, so as
to avoid the risk of burning.
Remove the casing protecting the pulleys.
Check that the pulleys are not torn or worn, and that there are no
lubricants or fuel on them. If this is not the case, replace them.
At the same time, make sure that the tensioning device is working
properly, proceeding as indicated in the figure.
Replace the guard casing in its housing, and lock all the seal
elements.
2
1
04_361_N
74178
