Nanni T4.230 Operator's Manual page 42

Replacing the fuel filter
NOTICE: Do not fill the new filter
with fuel before assembly.
1. Close the fuel cock. Clean the
filter bracket.
2. Remove the protective tank.
3. Put a plastic bag over the filter
to prevent leakage on the
engine.
4. Remove the fuel filter . Use a
filter wrench if needed.
Check and clean the sealing sur-
face of the filter bracket. Apply film
of fuel on the seal.
5. Screw the new filter by hand
until the seal touch the matting
surface. Screw a further half turn.
6. Open the fuel cock and bleed
the air in the fuel system.
39
Air bleeding
Bleeding the air in the fuel system
is necessary :
• After a maintenance operation
on the fuel system.
• If the fuel tank has been emp-
tied.
• The engine has not been started
for a long time.
To bleed the fuel system IF IT IS
NOT FITTED with an electric pump:
1. Fill totally the fuel tank. Open
the fuel cock.
2. Loose the venting screw
. Use rags around the venting
screw.
3. Pump the fuel using hte lever
until fuel free of air bubbles
flows from the venting screw.
NOTICE: If the lever is too hard to
operate, turn the crankshaft a frac-
tion of a turn.
4. Continue pumping and at the
same time tighten the venting
screw.
5. Pump few other times to prime
the system.