User Manual

• Fuel pressure sensor
• Fuel temperature sensor
• Water in fuel sensor
The following list contains examples of both
service and repairs when you must prime the
system:
• A fuel filter is changed.
• A low-pressure fuel line is replaced.
• The fuel injection pump is replaced.
For the correct procedure to prime the fuel system,
refer to Systems Operation, Testing and Adjusting,
“Fuel System - Prime”.
Primary Filter/Water Separator
Illustration 20 g02848802
Typical example
The primary filter/water separator (1) is located
between the fuel tank and the fuel transfer pump. The
primary filter/water separator (1) provides a 10
micron filtration level.
The primary filter/water separator can either be
engine mounted or supplied loose. The primary filter/
water separator is supplied with water in fuel sensor.
The water in fuel sensor has to be connected.
Secondary Fuel Filter
Illustration 21 g02848803
Typical example
The secondary fuel filter (1) is located after the fuel
transfer pump. The secondary fuel filter (1) provides
a 4 micron filtration level.
The fuel temperature sensor measures the
temperature of the fuel. The ECM receives the signal
from the fuel temperature sensor. The ECM
calculates the volume of fuel.
Fuel Pump Assembly
Illustration 22 g02493877
Typical example
UENR0623-02 27
Engine Operation
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