Bleeding Fuel System; Bleeding Air From Fuel Filter - Mitsubishi L Series Service Manual

1.5 Bleeding fuel system

Completely wipe off any spilled fuel from air vent plug
with a cloth, as spilled fuel can cause a fire.
Bleeding of the fuel system must be started from the place
closest to the fuel tank: the fuel filter the first and the fuel
injection pump the last.
1.5.1

Bleeding air from fuel filter

(1) Cartrige type paper element
Loosen the air vent screw marked by the letter "1."
Tighten the air vent screw when fuel does not show air
bubbles.
Loosen the air vent screw marked by the letter "2."
Tighten the air vent screw when fuel does not show air
bubbles.
Note: Place the starter key in the ON position for the fuel
pump type.
When the fuel supply is gravity type, fuel will flow
into the filter by itself.
(2) Cock type paper element (1)
Place the fuel filter cock lever in the OPEN position
and push the button several times to bleed the filter.
Note: When the fuel supply is gravity type, fuel will drop by
itself, and when the fuel supply is the pump type, fuel
and air in the filter will flow out with the starter key
positioned ON.
(3) Cock type paper element (2)
Loosen the left side air vent screw. Tighten the air vent
screw when fuel does not show air bubbles.
Loosen the right side air vent screw. Tighten the air
vent screw when fuel does not show air bubbles.
Note: When the fuel supply is gravity type, fuel will flow
into the filter by itself, and when the fuel supply is the
pump type, fuel and air in the filter will flow out with
the starter key positioned ON.
ADJUSTMENT AND OPERATION
Air vent screw
Loosen air vent
screws in numerical
order to bleed air
Bleeding air from fuel filter (cartridge type)
Cock lever
(open)
Bleeding air from fuel filter (switch cock type)
Left side plug
Cock lever
(open)
Bleeding air from fuel filter
Press the push
button several
times.
Right side plug
13-7