Mack M359, Manual

Page: 286 / 332

MAINTENANCE, LUBRICATION AND SERVICE
FUEL SYSTEM
Fuel/Water Separator
(Engine Mounted)
A warning lamp on the instrument panel
illuminates when water is detected in the
fuel. When the lamp illuminates, drain
the water from the separator by opening
the drain valve and allowing the water to
drain from the bowl into a suitable
container. When fuel begins to drain,
close the valve and tighten to 0.655 Nm
(5 in-lb). Dispose of the drained water/
fuel in an environmentally safe manner.
1 Water Separator Drain Valve
NOTE
DO NOT drain the water separator bowl
while the engine is running.
NOTE
Drain the filter water trap daily. Change
the fuel filters at every oil change.
Fuel / Water Separator (Chassis
Mounted)
Water and large contaminants fall to the
bottom of the body and can be drained
away. Dispose of the drained water/fuel
in an environmentally safe manner.
NOTE
DO NOT drain the water separator bowl
while the engine is running.
NOTE
Drain the filter water trap daily. Change
the fuel / water separator filter at every oil
change or when the fuel reaches the top
of the filter.
1 Drain Valve
ELEMAX® Filter
“SEEING IS BELIEVING”
®
The patented clear cover allows the user
to know when to change the filter. Fuel
level rises as the filter media becomes
contaminated, the fuel filter doesn’t
need replacement until fuel level is at the
Top of the filter.
Fuel Tank Ventilation Filter
Some vehicles are equipped with a fuel
tank ventilation filter. The purpose of this
component is to filter out contaminants
that can enter the fuel tank from the vent
lines.
This filter should be replaced in
conjunction with the vehicle air filter,
when indicated by the air restriction
gauge or the air filter restrictor indicator
light in the instrument cluster.
The maximum time allowed before
replacement is 24 months.
For non-severe environments a vehicle
will have a frame-rail mounted filter.
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