Fuel System Maintenance; Removal Of Water From The Fuel - Isuzu 4BG1 Instruction Manual

3. FUEL SYSTEM
Plug
Water
sedimentor 4 1 Warning level line
1 Drain plug
Float
Fig. 25
The fuel injection pump and fuel injection nozzles are precisely
manufactured, and therefore, using the fuel which contains water or
dust particles will result in either injection pump plunger seizure or
injection nozzle seizure, and the fouled fuel filter element with
sludge or dust particles lead to decreased engine output.
In addition, clogged filter element can cause low output or
automatic air bleeding failure.
Perform inspection and maintenance periodically as follows:
(1) Removal of Water from the Fuel
The fuel system with the water sedimentor.
The water sedimentor is provided to separate the water
contained in the fuel.
The sedimentor housing contains a float which moves up and
down in accordance with level change of the sedimented water.
Be sure to drain the sedimented water when the float has come
up to the warning level line marked on the transparent
sedimentor *housing.
Draining procedure:
Loosen the drain plug and drain the sedimented water.
Be sure to tighten the drain plug on completion of draining.
A packing of the "plug" which is provided at the upper portion
of the water sedimentor is not reusable. When the "plug" is
loosened, be sure to replace the packing witn a new one.
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