Nanni N4.65, Руководство оператора

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61
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 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.
S08 MAINTENANCE
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 of the fuel filter holder and loose it
up (see picture below).
3. Pump the fuel using the lever from bottom picture
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.