Isuzu 4LE2 - Draining Water from the Fuel Filter

5-22
INSPECTION AND MAINTENANCE
Draining Water from the Fuel Filter
The fuel filter has the structure of that the internal float floats up when water is
deposited inside. When the float floats up to the bottom of the cartridge, make sure to
remove the water.
CAUTION
Do not use any alcohol-based water remover or cleaning agent. If alcohol-
based water remover or cleaning agent is attached to a plastic component,
it can cause deterioration in fluid level visibility due to crazing, or in the worst
case, it can lead to a component crack, which can cause a fuel leakage.
When the fuel is attached to the engine, wipe it off completely.
It takes longer to start the engine than usual immediately after water removal
is performed. If the engine does not get started within 10 seconds, wait for a
while and then restart it.
Since the fuel is contained in the drained water, disposal and treatment of the
drained water must be conducted in accordance with the specified procedure.
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1. Loosen the air bleeder plug at the top of the
fuel filter.
2. Loosen the drain plug at the bottom of
the case to discharge the water deposited
inside.
3. After the water is removed, make sure to
tighten the air bleeder plug and drain plug
and remove the air from the fuel.
Drain plug tightening torque
2.0 N·m (0.2 kgf·m/1.4 lb·ft)
Air bleeder plug tightening torque
10.0 N·m (1.0 kgf·m/7.2 lb·ft)
ADVICE
Be careful not to over-tighten the air
bleeder plug.
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Bleeding the Fuel System
→ Refer to Page 5-23
Air bleeder plug
Priming pump
Cartridge
Float
Drain plug
Air bleeder plug
Priming pump
Cartridge
Float
Drain plug
IDE-6450A4500781ALL.indd5-22IDE-6450A4500781ALL.indd5-22 2014/04/1814:20:032014/04/1814:20:03