Nanni QLS 65T, User Manual

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50
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. Loosen drain plug (C) and drain fuel in a suitable
container.
3. Rorate ring (A) counter clock wise (CCW) of 1/4 of
turn. Remove ring along with filter ( B).
4. Inspect filter mounting for cleanliness. Clean as
required.
5. Install new filter element onto mounting base. Be
sure that element is properly indexed and firmly
seated on base. It may be necessary to rotate filter
for correct alignment.
6. Install retaining ring onto mounting base making
certain dust seal is in place on filter base. hand
thighten ring (about (1/3 turn) until it “snaps” into the
detent. DO NOT overthighten the retaining ring.
7. Bleed the fuel system.
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.
HOW TO BLEED THE FUEL SYSTEM:
1. Fill up completely the fuel tank. Open the fuel valve.
2. To avoid spills, Dispatch a non flint cloth around the
venting screw (D ) of the fuel filter holder and loose it
up (see picture on left side of this same page).
3. Pump the fuel using the push button (E) 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.
CAUTION !
Avoid draining all fuel from the filter during this process.