2018 FORD F-650/750 frame-mounted fuel filters

Right-hand side.
A
Left-hand side.
B
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 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.
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing IntroductionE154903

Other maintenance items
1
Replace the engine-mounted and frame-mounted fuel
filters. 2
Every 22,000 mi
(36,000 km)
Inspect engine and secondary cooling system coolant
concentration (freeze-point protection), additive (corro-
sion inhibitor) strength, coolant level, and hoses. Add
coolant additive if necessary.3
Every
30,000 mi
(48,000 km)
Replace the air inlet foam filter.
Every
45,000 mi
(72,000 km)
Inspect the accessory drive belt(s). 4
At
90,000 mi
(144,000 km))
Change the rear axle fluid. See
Special Operating
Conditions Scheduled Maintenance
(page 330). 5
At
100,000 mi
(160,000 km)
Change the engine and secondary cooling system coolant. 6
Every
105,000 mi
(168,000 km) Change crankcase ventilation filter.
Change the automatic transmission fluid and filter. Consult
an authorized dealer for requirements.
Every
150,000 mi
(240,000 km)
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing Scheduled Maintenance

Diesel Engine
If you operate your vehicle primarily in any
of the following conditions, you need to
perform extra maintenance as indicated.
If you operate your vehicle
occasionally under any of these conditions, it is not
necessary to perform the extra
maintenance. For specific
recommendations, see your dealership
service advisor or technician. Towing a Trailer or Using a Car-top Carrier
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
See the axle maintenance items under
Exceptions.
Replace the engine-mounted and frame-mounted fuel
filters.
Every
15,000 mi
(24,000 km) or six months,
600 engine hours
Inspect the coolant concentration (freeze-point protec-
tion) and additive (corrosion inhibitor) strength. Add
coolant additive if necessary.
Every
30,000 mi
(48,000 km) or 1200 engine
hours
Flush and refill the coolant. Do not add coolant additive.
Every
60,000 mi
(96,000 km) or 2400
engine hours
Note: When adding coolant additive, do not exceed the specified maximum of
50 fl oz
(1.4 L) for the engine and 20 fl oz (473 ml) for the secondary cooling system. Operating the
engine with excessive coolant additive may cause overheating which could lead to severe,
permanent engine damage.
Note: After the initial coolant flush and fill at
60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing Scheduled Maintenance

Frequent or Extended Idling (Over 10 Minutes Per Hour of Normal Driving) or Frequent
Low-speed Operation if your Vehicle is Used for Stationary Operation
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Inspect the coolant concentration (freeze-point protec-
tion) and additive (corrosion inhibitor) strength. Add
coolant additive if necessary.
Every
30,000 mi
(48,000 km) or 1200 engine
hours
Flush and refill the coolant. Do not add coolant additive.
Every
60,000 mi
(96,000 km) or 2400
engine hours
Note: When adding coolant additive, do not exceed the specified maximum of
50 fl oz
(1.4 L) for the engine and 20 fl oz (473 ml) for the secondary cooling system. Operating the
engine with excessive coolant additive may cause overheating which could lead to severe,
permanent engine damage.
Note: After the initial coolant flush and fill at
60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing Scheduled Maintenance

Frequent Low-speed Operation, Consistent Heavy Traffic Under 24.9 mph (40 km/h) or
Long Rush-hour Traffic
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Inspect the coolant concentration (freeze-point protec-
tion) and additive (corrosion inhibitor) strength. Add
coolant additive if necessary.
Every
30,000 mi
(48,000 km) or 1200 engine
hours
Flush and refill the coolant. Do not add coolant additive.
Every
60,000 mi
(96,000 km) or 2400
engine hours
Note: When adding coolant additive, do not exceed the specified maximum of
50 fl oz
(1.4 L) for the engine and 20 fl oz (473 ml) for the secondary cooling system. Operating the
engine with excessive coolant additive may cause overheating which could lead to severe,
permanent engine damage.
Note: After the initial coolant flush and fill at
60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing Scheduled Maintenance

Sustained High-speed Driving at Gross Vehicle Weight Rating (Maximum Loaded Weight
for Vehicle Operation)
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Inspect the coolant concentration (freeze-point protec-
tion) and additive (corrosion inhibitor) strength. Add
coolant additive if necessary.
Every
30,000 mi
(48,000 km) or 1200 engine
hours
Flush and refill the coolant. Do not add coolant additive.
Every
60,000 mi
(96,000 km) or 2400
engine hours
Note: When adding coolant additive, do not exceed the specified maximum of 48 fluid
ounces (1.4 liters) for the engine and 16 fluid ounces (473 ml) for the secondary cooling
system. Operating the engine with excessive coolant additive may cause overheating which
could lead to severe, permanent engine damage.
Note: After the initial coolant flush and fill at
60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter. Operating in Sustained Ambient Temperatures Below -9.4°F (-23°C) or Above 100.3°F
(38°C)
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every
15,000 mi
(24,000 km), six months or
600 engine hours Operating in Dusty or Sandy Conditions (Such as Unpaved or Dusty Roads)
Rotate the tires1
, inspect the tires for wear and measure
tread depth.
Every
7,500 mi (12,000 km)
Inspect the brake system pads and rotors.
Inspect the air filter restriction gauge. Replace the filter if
necessary.
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing Scheduled Maintenance

Operating in Dusty or Sandy Conditions (Such as Unpaved or Dusty Roads)
Inspect the steering and suspension ball joints and tie rods.
Lubricate any grease fittings.
Change the engine oil and filter. 2
Every 7,500 mi (12,000 km),
six months or 300 engine
hours Inspect and lubricate the U-joints.
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), 6 months or
600 engine hours
Replace the air inlet foam filter.
Every
30,000 mi
(48,000 km)
1 Vehicles with dual rear wheels should rotate the front wheels when specified; rear wheels
only if unusual wear is noted.
2 Reset the Intelligent Oil-Life Monitor after engine oil and filter changes. Off-road Operation
Inspect functional holes in each leg of the twin exhaust
tips and the holes under the shield just inboard of the right
rear tire to make sure they are clean and clear of debris or
foreign materials. Refer to the Vehicle Care chapter of your
owner ’s manual for more information.
As required
Inspect the steering and suspension ball joints and tie rods.
Lubricate any grease fittings.
Rotate the tires1
, inspect the tires for wear and measure
tread depth.
Every 7,000 mi (12,000 km),
six months or 300 engine
hours
Inspect the brake system pads and rotors.
Inspect the air filter restriction gauge. Replace the filter if
necessary.
Change the engine oil and filter. 2
Every 7,000 mi (12,000 km)
or 300 engine hours
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing Scheduled Maintenance

Off-road Operation
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Replace the air inlet foam filter.
Every
30,000 mi
(48,000 km)
1 Vehicles with dual rear wheels should rotate the front wheels when specified; rear wheels
only if unusual wear is noted.
2 Reset the Intelligent Oil-Life Monitor after engine oil and filter changes. Using Biodiesel, up to and Including 20% Biodiesel (B20)
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every
15,000 mi
(24,000 km), six months or
300 engine hours Using Fuel Other Than Ultra-low Sulfur Diesel Fuel - Vehicles Operated Where Ultra-low
Sulfur Diesel Fuel is not Required or Available
Change engine oil and filter.
Every
2,500 mi (4,000 km)
or three months (if using
high sulfur fuel with more
than 500 ppm sulfur)
Change engine oil and filter.
Every
5,000 mi (8,000 km)
or six months (if using high
sulfur fuel with fewer than
500 ppm sulfur)
Exceptions
There are several exceptions to the Normal
Schedule:
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F650750 (TBC) , enUSA, Edition date: 201708, First Printing Scheduled Maintenance