When Required - Mitsubishi SS series Users Manual And Maintenance Manual

6.6

When required

6.6.1 Prime fuel system
Air in the lines may cause the fuel system to
become air bound, resulting in an inability to start
the engine or the misfiring of one or more
cylinders. Prime the fuel system:
1. After the engine has been fueled for the first
time after installation.
2. After the engine has been refueled after
running out of fuel.
3. After the fuel filter element has been cleaned
or replaced.
6.6.2 Procedure
Fuel filter
1. Loosen the air vent plug on the fuel filter (by
turning it 1.5 turns).
2. Unlock the priming pump plunger by turning it
to the left, and operate the pump.
3. Tighten the air vent plug when the fuel flows
free of bubbles.
Air vent plug
Fuel injection pump
1. Loosen the air vent plug on the injection pump
(by turning it 1.5 turns).
2. Unlock the priming pump plunger by turning it
to the left, and operate the pump.
3. Tighten the air vent plug when the fuel flows
free of bubbles.
Operation Manual Mitsubishi SS-Series diesel engines
Version 08/2004
Priming button
Air vent plug
NOTE
1. If the vent plug is tightened before the
priming pump plunger is locked, fuel
pressure acts on the feed pump, making it
difficult to restore the plunger.
2. Clean up fuel spillage.
6.6.3 Clean/change air cleaner element
Service the air cleaner only when it is necessary,
or when the dust indicator indicates RED.
6.6.4 Cleaning
1. Direct air — 7 kgf/cm
maximum — inside the element along the
length of pleats.
2. Insert a light inside the clean element and
check. Replace the element if rips or tears are
found.
.
.
NOTE
Replace the element if it is excessively dirty.
ENGLISH
MAINTENANCE
Priming button
2
(100 psi) [686 kPa]
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