Isuzu 4LE2 User Manual

5-23
INSPECTION AND MAINTENANCE
Bleeding the Fuel System
When air mixes into the fuel system, this can cause a difficulty in engine starting or
engine malfunction. When the fuel tank is emptied, or when water removal from fuel
or filter element replacement is performed, make sure to carry out air removal.
1. Turn the starter switch to "DRIVE" position,
and activate the electromagnetic pump, etc.
2. Loosen the air bleeder plug of the fuel filter
sufficiently, and operate the priming pump
until the fuel comes out.
3. Tighten the air bleeder plug and operate the
priming pump 10 times or more until the fuel
filter is filled with fuel.
4. Wait for approx. 1 minute, and loosen the air
bleeder plug to remove the air from the fuel
filter.
5. Repeat Steps 2 through 4 at least 3 times
until air does not come out from the air
bleeder plug.
6. Securely tighten the air bleeder plug, and
wipe off the fuel spread around.
7. Start the engine without manipulating the
engine speed on the machine side. If the
engine does not start at this time, repeat the
procedure from Step 3.
8. After the engine has started, allow it to idle
for 5 seconds.
9. Slowly raise the engine speed, and maintain the status for 3 minutes.
10. Raise the engine speed up to the maximum speed, and then decrease it to the
idle speed.
11. Repeat Steps 8 through 10 several times.
WARNING
Start the engine to inspect for a leakage in the fuel system. A leakage can
cause a fire.
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Air bleeder plug
Priming pump
Cartridge
Float
Drain plug
Air bleeder plug
Priming pump
Cartridge
Float
Drain plug
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Isuzu 4LE2 Specifications

General

Brand	Isuzu
Model	4LE2
Category	Engine
Language	English