Fuel Filters; Fuel Injection Pump - Mitsubishi S 12 R User And Maintenance Manual

Chapter 3
OPERATION
Bleed the fuel system
When fuel overflows from the air vent plug,
wipe thoroughly with a cloth. Spilled fuel is a
fire hazard.
After bleeding, lock the priming pump cap
securely. If the cap is not locked tightly, the
priming pump can be damaged, causing fuel
leakage that may lead to a fire. To lock the prim-
ing pump cap, follow the procedure described
on the following page.
Closing all air vent plugs before locking the priming
pump cap disallows the priming pump cap from
returning to the original position due to internal
pressure.
Bleed air from the location closest to the fuel tank
that are the fuel filters, then the fuel injection pump.

Fuel filters

1 Loosen the air vent plug on the fuel filter of the
double-filter system by rotating about 1.5 turns.
2 Loosen the priming pump cap by turning coun-
terclockwise and move it up and down.
3 When there are no air bubbles in the fuel flowing
from the air vent plug, tighten the air vent plug to
the specified torque.
4 Repeat the same procedure with the right fuel
filter.
5 Repeat the same procedure with the fuel filters
located on the other side of the engine.

Fuel injection pump

1 Loosen the air vent cock on the fuel injection
pump by rotating about 1.5 turns.
2 Move the priming pump cap up and down
repeatedly. When there are no air bubbles in the
fuel flowing from the air vent cock, press down
the priming pump cap and turn the cap clock-
wise.
3 Tighten the air vent cock on the fuel injection
pump.
3-2
[Unlock ] [Prime]
Turn counterclockwise
fig.3-1 Using the priming pump
Air vent plug
Tightening torque
7.8 to 9.8 N⋅m
(0.8 to 1.0 kgf⋅m
fig.3-2 Fuel filters
Air vent plug
fig.3-3 Fuel injection pump
[Lock]
Turn conterclockwise
while pressing
Move cap up
and down