DRAINING THE FUEL WATER
SEPARATOR
The water separator on the bottom of the fuel filter
should be checked daily and drained when needed.
Frequency of draining will be determined by oper-
ating conditions and quality of the fuel.
To drain the separator, use the following procedure:
1. Place a container capable of holding at least
0.5 pint (0.2 L) at the end of the hose under-
neath the drain plug.
2. Loosen the drain plug and air intake plug until
water begins to flow.
3. Allow the water and any contaminated fuel to
drain into a pan.
4. When flow no longer contains water, install
and tighten the drain plug and air intake plug.
The drain must always be closed before start-
ing the engine.
5. Bleed air from the fuel system by following the
instructions in the operator manual supplied
by the manufacturer of the truck engine and
auxiliary engine.
6. Start the engine, then make sure that no fuel
is leaking from the filter.
NOTICE
The presence of a large amount of water in the filter
may indicate that water should be drained from the
fuel tank. If so, the cause of the water build-up
should be found.
CHANGING FUEL FILTER
To change the fuel filter (Figure SP-7), use the fol-
lowing procedure:
1. Loosen the spring clamp to remove the filter
from the filter head.
2. Inspect the filter for water build-up before dis-
carding it.
3. Clean the filter sealing surface.
SP-9
SERVICE
PROCEDURES
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