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E154903
A
Right-hand side.
B
Left-hand side.
Warnings
WARNING
Throughout this guide, you will find
warnings identified by the warning
symbol. Warnings remind you to be
especially careful to reduce the risk of
personal injury.
Diesel Engine Information
The diesel engine fuel system is a
pressurized two-stage filtration system
and consists of:
•
A frame-mounted Fuel and Water
Separator primary filter with an electric
fuel pump and water drain
•
An engine-mounted secondary fuel
filter
•
A fuel injector for each cylinder (8
total)
•
A high-pressure fuel pump
•
A high-pressure fuel rail for each
cylinder bank (2 total)
•
Numerous high-pressure pipes from
the high-pressure pump to the rails,
and rails to the injectors
F650750 (TBC) , enUSA, Edition date: 201708, First Printing
Introduction
The fuel and water separator removes
both water and impurities from the fuel.
The engine-mounted filter filters finer
impurities from the diesel fuel. The
engine-mounted fuel filter and the
frame-mounted fuel filter should be
changed at the recommended service
interval or when indicated by the
information display LOW FUEL PRESSURE
message. See Scheduled Maintenance
(page 320).
The fuel and water separator should be
drained at regular intervals (recommended
at every oil change) or when indicated by
the information display and water in fuel
indicator light. See Fuel Quality (page
93).
Proper fuel filter maintenance and prompt
water draining when the water in fuel light
illuminates is essential to prevent injection
equipment damage. Ignoring the water in
fuel light or the information display
message WATER IN FUEL DRAIN FILTER
can cause your vehicle to go into a reduced
power mode.
A frame-mounted electric fuel pump
located inside the fuel and water separator
draws fuel from the fuel tank to provide
pressurized fuel to the engine. The fuel
pump contains a pressure relief valve for
overpressure protection in the event of
restricted flow.
The fuel injection system is controlled
through the powertrain control module.
Engine Protection Mode
Ford diesel engines are equipped with
engine protection and emission control
systems. These systems monitor critical
temperatures and pressures, and modify
engine operation accordingly. These
modified engine performance
characteristics are normal.
8
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