3-2
Chapter 3 OPERATION
Fuel system - Bleed air
While feeding fuel with priming pump, bleed air from
the location closest to the fuel tank that are the water
separator, fuel filter, then the fuel injection pump.
Lock the priming pump according to "Priming pump
tightening method".
Fig. 3-1 Priming pump - Handle
Fuel filter - Bleed air
1. Loosen the air vent plug on the fuel filter about 1.5
turns.
2. Move the priming pump up and down, then feed fu-
el.
3. When the fuel from the air vent plug becomes free
from air bubbles, stop priming and tighten the air
vent plug to the specified torque.
Fig. 3-2 Fuel filter - Bleed air
Fuel injection pump - Bleed air
1. Loosen the air vent plug on the fuel injection pump
by rotating about 1.5 turns.
2. Move the priming pump up and down until the fuel
flow from the air vent plug is free from air bubbles.
Push and turn the priming pump clockwise to lock
in the original position when the fuel flows is free
from bubbles.
3. Tighten the air vent plug on the fuel injection pump.
Fig. 3-3 Fuel injection pump - Bleed air
When fuel overflow from the air vent plug, wipe thor-
oughly. Spilled fuel causes fire hazard.
After bleeding, lock the priming pump securely. If the
cap is not locked tightly, the priming pump can be
damaged, causing a fuel leak that could lead to a
fire.
[Unlock] [Priming] [Lock]
Turn left
Move up
and down
Hold and
turn right
If air vent plugs, the thread portion of the bracket, or
sealing washers are damaged, replace them with
new ones.
Air vent plug
Tightening torque
8.8 ± 1 N·m
{0.9 ± 0.1 kgf·m}
[6.4 ± 0.7 lbf·ft]
Priming pump
Air vent plug
15 ± 2 N·m
{1.5 ± 0.2 kgf·m}
[11.0 ± 1.4 lbf·ft]
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