freightliner PE116DC, Maintenance Manual

Page: 137 / 164

47–00 Safety Precautions
Safety Precautions in this section apply to all
procedures within this group.
DANGER
When working on the vehicle, shut down the en-
gine or motor, set the parking brake, and chock
the tires. Before working under the vehicle, always
place jack stands under the frame rails to ensure
the vehicle cannot drop. Failure to follow these
steps could result in serious personal injury or
death.
47–01 Fuel Filter Replacement
For engine-mounted fuel filter replacement, refer to
the engine manufacturer’s service manual for re-
moval and installation procedures.
47–02 Fuel/Water Separator
Element Checking and
Replacement
IMPORTANT: For chassis-mounted fuel filter
replacement, refer to the engine manufacturer’s
service literature for replacement intervals.
Detroit
The only maintenance necessary on an Detroit
fuel/water separator is to replace the filter element.
See
Fig. 1 .
WARNING
Fluid circulated through the fuel/water separator
to heat the fuel may be diesel fuel returned from
the engine, or engine coolant. Drain the fuel/water
separator only when the engine and fluids have
cooled. Draining it when the engine is hot could
cause severe personal injury due to scalding.
If returning fuel is released into the atmosphere,
its vapors can ignite in the presence of any igni-
tion source. Do not expose the fuel to, or work
with the fuel system near, open flame or intense
heat. To do so could cause fire, possibly resulting
in serious personal injury or property damage.
1. Drain off some fuel by loosening the vent plug
and opening the drain valve.
2. Disconnect the water sensor and heater connec-
tions if equipped.
3. Remove the bowl by turning counterclockwise.
4. Remove the element, bowl O-ring, and element
o-ring. Dispose of them in an environmentally
acceptable manner.
5. Thoroughly clean all of the threads and sealing
surfaces. Even a small amount of dirt will prevent
the fuel/water separator from sealing, and an air
leak may result.
6. Apply a coating of clean fuel or motor oil to the
new O-ring and to the new element o-ring.
7. Insert the new element into the upper housing.
IMPORTANT: Do not use tools to tighten the
bowl and element.
8. Spin the bowl onto the onto the upper housing
by hand only.
f470689 06/09/2016
1
2
1. Mounting Head 2. Sight Bowl
Fig. 1, Detroit Fuel/Water Separator
Fuel
47
New Cascadia Maintenance Manual, November 2017
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