Nanni T8V.320, Operator'S Manual, Page: 61 / 98

61
S08 MAINTENANCE
REPLACING THE FUEL FILTER
NOTE !
To ease up the air bleeding during fuel filter replacement,
the filter assembly may be filled with some fuel, only if
you are sure not to spill any.
Above picture : fuel filter assembly.
1. Close the fuel butterfly (control) valve. Wipe up the
holding filter bracket with a clean non flint cloth.
2. Remove the protective tank.
3. Put a plastic bag over the filter ( A ) to prevent spills
on the engine.
4. Remove the fuel filter. Use a filter wrench tool if filter
is seized.
5. Check and clean the sealing surface of the filter
bracket. Apply a thin film of fuel onto the seal.
6. Screw the new filter by hand until the seal is flush
with the matting surface. Thight up a further half
turn.
7. To bleed the air in the fuel system, see next paragraph
for complete explanations.
AIR BLEEDING
Bleeding the air in the fuel system might be required :
• After a maintenance operation on the fuel system.
• If the fuel tank has been emptied.
• The engine has not been started for a long time.
TO BLEED THE FUEL SYSTEM FITTED WITH THE
STANDARD MECHANICAL PUMP :
1. Fill up completely the fuel tank. Open the fuel valve.
2. To avoid spills, Dispatch a non flint cloth around the
venting screw ( C ) of the fuel filter holder and loose it
up (see picture on left side of this page).
3. Pump the fuel using the push button ( B ) back and
forth until fuel free of air bubbles flows out of the
venting screw.
4. At this stage, you can tighten the venting screw.
5. Pump a few more times to make sure to prime
completely the system.