Mitsubishi S12U User Manual

Chapter 3 OPERATION
3-3
Bleeding Air from Fuel Filters
(Cartridge-Type)
1 Set the handle of the fuel filters (cartridge-type)
to the "Left - Open, Right - Bleed position, and
loosen the right-side air vent plug by rotating it
about 1.5 turns.
2 Move the priming pump cap back and forth.
When the fuel flowing from the right-side air vent
plug no longer contains air bubbles, tighten the
air vent plug.
3 Set the handle to the "Right - Open, Left - Bleed
position, and open the left-side air vent plug.
4 Move the priming pump cap back and forth.
When the fuel flowing from the left side air vent
plug no longer contains air bubbles, tighten the
air vent plug.
5 Return the handle to the normal position.
Replace to a new part if there is a damage on the
air vent plug, thread area of bracket or sealing
washer.
Bleeding Air from Fuel Feed Pipe
1 Loosen the air vent cock on the fuel feed pipe by
rotating about 1.5 turns.
2 Move the priming pump cap back and forth
repeatedly. When there are no air bubbles in the
fuel flowing from the air vent cock, press the
priming pump cap and turn the cap clockwise to
lock.
3 Tighten the air vent cock on the fuel feed pipe.
Tighten the priming cap before closing the air vent
plug.
Closing all air vent plugs before the priming pump
cap disalllows the priming pump cap from returning
to the original position due to internal pressure.
When fuel overflows from the air vent plug, wipe
throughly with a cloth. Spilled fuel causes fire haz-
ard.
fig.3-4 Bleeding air from fuel filters (cartridge-type)
fig.3-5 Fuel filter switchover cock
Right side
bleeding position
Left side
bleeding position
Left side filter
replacement position
(Fuel flows through
right-side fuel filter only)
Normal position
(Fuel flows through
left side fuel filters only.)
fig.3-6 Bleeding air from fuel feed pipe (1)
Fuel feed pipe
Air vent cock
fig.3-7 Bleeding air from fuel feed pipe (2)
Fuel feed pipe
Air vent cock
Right side air vent plug
and sealing washer
Left side
air vent plug and
sealing washer
Right side fuel filters
Left side fuel filters
Handle
Bracket

Mitsubishi S12U Specifications

General

Brand	Mitsubishi
Model	S12U
Category	Engine
Language	English