2023 FORD F650/750 maintenance

Do not use supplemental engine oil
additives because they are unnecessary
and could lead to engine damage that may
not be covered by the vehicle Warranty.
To top up the engine oil level do the
following:
1. Clean the area surrounding the engine
oil filler cap before you remove it.
2. Remove the engine oil filler cap. See
Under Hood Overview (page 222).
Turn it counterclockwise and remove
it.
3. Add engine oil of the proper viscosity
and grade that meets Ford
specifications. See Engine Oil
Capacity and Specification (page
292). You may have to use a funnel to
pour the engine oil into the opening.
4. Recheck the oil level.
5. If the oil level is correct, replace the
dipstick and make sure it is fully seated.
6. Replace the engine oil filler cap. Turn
it clockwise until you feel a strong
resistance.
Note: Do not add oil further than the
maximum mark. Oil levels above the
maximum mark may cause engine damage.
Note:Make sure you install the oil filler cap
correctly.
Note:Soak up any spillage with an
absorbent cloth immediately.
Engine lubrication for severe
service operation
The following conditions define severe
operation for which engine operation with
SAE 5W-40 oil which meets Ford
specification, WSS-M2C171-F1, is
recommended. Oil and oil filter change
intervals will be determined by the
Intelligent Oil Life Monitor™ as noted
previously.
ENGINE OIL CHECK - 7.3L
1. Make sure that your vehicle is on level
ground.
2. Check the oil level before starting the
engine, or switch the engine off after
warm up and wait 10 minutes for the
oil to drain into the oil pan.
3. Remove the dipstick and wipe it with
a clean, lint-free cloth.
4. Reinstall the dipstick and make sure it
is fully seated.
5. Remove the dipstick again to check the
oil level.
Note: If the oil level is between the
maximum and minimum marks, the oil level
is acceptable. Do not add oil.
6. If the oil level is at the minimum mark,
immediately add oil.
7. Reinstall the dipstick. Make sure it is
fully seated.
Note:The oil consumption of new engines
reaches its normal level after approximately
3,000 mi (5,000 km).
Adding Engine Oil
WARNING: Do not add engine oil
when the engine is hot. Failure to follow
this instruction could result in personal
injury.
WARNING: Do not remove the filler
cap when the engine is running.
Do not use supplemental engine oil
additives because they are unnecessary
and could lead to engine damage that the
vehicle warranty may not cover.
1. Clean the area surrounding the engine
oil filler cap before you remove it.
2. Remove the engine oil filler cap.
225
Maintenance

3. Add engine oil that meets our
specifications. See Capacities and
Specifications (page 288).
4. Reinstall the engine oil filler cap. Turn
it clockwise until you feel a strong
resistance.
Note: Do not add oil further than the
maximum mark. Oil levels above the
maximum mark may cause engine damage.
Note:Immediately soak up any oil spillage
with an absorbent cloth.
Engine Oil Pressure Warning Lamp
WARNING: If it illuminates when
you are driving do not continue your
journey, even if the oil level is correct.
Have your vehicle checked.
It illuminates when you switch
the ignition on.
If it illuminates when the engine
is running this indicates a malfunction.
Stop your vehicle as soon as it is safe to
do so and switch the engine off. Check the
engine oil level. If the oil level is sufficient,
this indicates a system malfunction. Have
your vehicle checked as soon as possible.
CHANGING THE ENGINE OIL
AND OIL FILTER
WARNING: Do not add engine oil
when the engine is hot. Failure to follow
this instruction could result in personal
injury.If your vehicle has a diesel engine, an
Intelligent Oil Life Monitor™ calculates the
proper oil change service interval. When
the information display indicates: OIL
CHANGE REQUIRED, change the engine
oil and oil filter. See Information
Displays (page 70).
The engine oil filter protects your engine
by filtering harmful, abrasive or sludge
particles and particles significantly smaller
than most available will-fit filters. See
Motorcraft Parts (page 290).
1. Unscrew the oil filter and oil pan drain
plug and wait for the oil to drain.
2. Replace the filter.
3. Reinstall the oil pan drain plug.
4. Refill the engine with new oil. See
Engine Oil Capacity and
Specification (page 295).
5. For diesel engines, you need to reset
the Intelligent Oil Life Monitor™. See
Information Displays (page 70).
Engine Lubrication for Severe
Service Operation
The following conditions define severe
operation:
• Frequent or extended idling such as
over 10 minutes per hour of normal
driving.
• Low-speed operation or stationary use.
• If the vehicle is operated in sustained,
ambient temperatures below -9°F
(-23°C) or above 100°F (38°C).
• Frequent low-speed operation, or
consistent heavy traffic less than
25 mph (40 km/h).
• Operating in severe dust conditions.
• Operating the vehicle off road.
• Towing a trailer over 1,000 mi
(1,600 km).
226
Maintenance

• Sustained, high-speed driving at the
gross vehicle weight rating.
• Use of fuels with sulfur content other
than ultra-low sulfur diesel (ULSD).
• Use of high-sulfur diesel fuel.
Only use engine oil that meets our
specifications. See Capacities and
Specifications (page 288).
OIL CHANGE INDICATOR
RESET
Base Cluster
Use the information display controls on
the steering wheel to reset the oil change
indicator.
From the main menu scroll to:
Action and Description Message
Press the right arrow button,
then from this menu scroll
to the following message. Settings
Press the down arrow
button, then from this menu
scroll to the following
message. Vehicle
Press the right arrow button,
then from this menu scroll
to the following message. Oil Life
Reset
Press and hold the OK
button until the instrument
cluster displays the
following message. Oil Life
Hold to
Reset
Press and hold the OK
button until the instrument
cluster displays the
following message. Oil Life
Hold OK
to Reset
Action and Description Message
Reset Complete
If the instrument cluster
displays the following
message, repeat the
process.
Reset Cancelled
High Series Cluster
Use the information display controls on
the steering wheel to reset the oil change
indicator.
From the main menu scroll to:
Action and Description Message
Press the down arrow
button, then from this menu
scroll to the following
message. Truck Info
Press the OK button. Mainten-
ance
Monitor
Press the down arrow
button, then from this menu
scroll to the following
message. Oil Life:
xxx%
Press the OK button. Oil Life
Press and hold the OK
button until the instrument
cluster displays the
following message. Oil Life
Hold OK to
Reset
Oil Life: 100%
When the oil change indic-
ator resets, the instrument
cluster displays 100%.
Repeat the process if the oil
change indicator does not
reset.
227
Maintenance

CHANGING THE ENGINE AIR
FILTER - 6.7L DIESEL
Air Filter Restriction Gauge
WARNING: To reduce the risk of
vehicle damage and personal burn
injuries, do not start your engine with the
air cleaner removed and do not remove
it while the engine is running.
Note:Operating your vehicle in heavy
snowfall or extreme rain conditions may
allow excessive amounts of snow or water
into the air intake system. This could plug
or soak the air filter and cause the engine to
lose power or shut down.
E163372
The restriction gauge, on the upper housing
of the air filter assembly, measures the
vacuum inside the air filter. The more the
air filter is dirty or clogged, the higher the
vacuum reading.
Check the air filter restriction gauge
whenever you open the hood to perform
general engine maintenance or at least
every 7,500 mi (12,000 km). If you operate
your vehicle in extremely dusty conditions,
check and reset the gauge at least every
500 mi (800 km), or two weeks, whichevercomes first. Change the air filter when the
restriction gauge reads near the change
filter line and the gauge is yellow. If you
allow the restriction gauge to reach
maximum restriction, you can affect your
engine performance and fuel economy.
Note:Do not blow out the air filter element
with compressed air since the compressed
air could damage the filter paper.
Note:Do not rely on filter appearance
alone. A filter which appears to be dirty may
have several thousand miles (kilometers)
of life remaining.
E163373
After installation of the new filter element,
reset the gauge by pressing the reset
button on top of the gauge.
We recommend the following actions after
operating the vehicle up to 200 mi
(320 km) in heavy snowfall or extreme
rain:
• Snow: At the earliest opportunity, open
the hood and clear all the snow and ice
from the air filter housing inlet. Do NOT
remove the foam filter and reset the
air filter restriction gauge.
• Extreme rain: The air filter dries after
about 15–30 minutes at highway
speeds. At the earliest opportunity,
open the hood and reset the air filter
restriction gauge.
228
Maintenance

Air Filter Replacement
When replacing the air filter element, use
a Motorcraft® air filter element. See
Motorcraft Parts (page 290).
Note:Failure to use the correct air filter
element may result in severe engine
damage.
E317651E317651
1. Locate the mass airflow sensor
electrical connector on the air inlet
tube. Disconnect the electrical
connector. Unlock the locking clip on
the connector, then squeeze and pull
the connector off the air inlet tube.
E317652
x3
2. Remove the clips that secure the air
filter housing cover. Push the air filter
cover forward and away from you when
pulling up slightly to release it.
3. Remove the air filter element from the
air filter housing.
E163376
4. Remove and install a new foam filter,
if needed. See Scheduled
Maintenance (page 319). If you do not
replace the foam filter, be sure the
existing foam filter is in place.
229
Maintenance

E163377
5. Install a new air filter element. Be sure
that the groove seal on the pleated
paper filter traps both sides of the
vertical partition of the air box.
6. Engage the clips to secure the air filter
housing cover to the air filter housing.
Be careful not to crimp the filter
element edges between the air filter
housing and cover. Ensure that you
align the tabs on the edge properly into
the slots.
7. Reconnect the mass airflow sensor
electrical connector to the inlet tube.
Make sure the locking tab on the
connector is in the locked position.
CHANGING THE ENGINE AIR
FILTER - 7.3L
WARNING: To reduce the risk of
vehicle damage and personal burn
injuries, do not start your engine with the
air cleaner removed and do not remove
it while the engine is running.
Note:Operating your vehicle in heavy
snowfall or extreme rain conditions may
allow excessive amounts of snow or water
into the air intake system. This could plug
or soak the air filter, and cause the engine
to lose power or shut down.When replacing the air filter element, use
a Motorcraft® air filter element. See
Motorcraft Parts (page 290).
Note: Failure to use the correct air filter
element may result in severe engine
damage, and may void the vehicle warranty.
Change the air filter element at the correct
interval. See Scheduled Maintenance
(page 319).
E317615E317615
1. Locate the mass air flow sensor
electrical connector on the air outlet
tube. Disconnect the mass air flow
sensor electrical connector.
E317616E317616
230
Maintenance

2. Reposition the locking clip on the
connector, squeeze the connector and
pull it off the air outlet tube.
E317617E317617
3. Clean the area from around the air tube
to the air cover connection to prevent
debris from entering the system. Next,
loosen the bolt on the air tube clamp
so the clamp is no longer snug to the
air tube. It is not necessary to
completely remove the clamp.
4. Pull the air tube off from the air cleaner
housing.
E317618
x3
5. Remove the clips that secure the air
filter housing cover. Push the air filter
cover toward the center of the vehicle
and up slightly to release it.
6. Remove the air filter element from the
air filter housing.
7. Install the new air filter element.
8. Engage the clips to secure the air filter
housing cover to the air filter housing.
Be careful not to crimp the filter
element edges between the air filter
housing and cover. Ensure that you
align the tabs on the edge properly into
the slots.
9. Slip the air tube onto the air filter
housing and tighten the air-tube clamp
bolt snugly. Do not over tighten
air-tube clamp bolt.
231
Maintenance

E317619E317619
10. Reconnect the mass air flow sensor
electrical connector to the outlet
tube. Make sure the locking tab on
the connector is in the locked
position.
DRAINING THE FUEL FILTER
WATER TRAP - 6.7L DIESEL
Your vehicle is equipped with a diesel fuel
conditioner module located on the
frame-rail under the driver-side floorboard
near the transmission.
You should drain water from the
module assembly whenever the
warning light comes on and the
message center directs you to drain the
water separator. This will occur when
approximately 8.45 fl oz (250 ml) of water
accumulates in the module. If you allow
the water level to exceed this level, the
water may pass through to the engine and
may cause fuel injection equipment
damage.
Draining the Diesel Fuel
Conditioner Module (DFCM)
WARNING: Do not drain the
water-in-fuel separator while the engine
is running. Failure to follow this warning
may result in fire, serious injury, death or
property damage.
Note:If you drain the diesel fuel conditioner
module while the system is running air will
enter into the fuel system. The engine will
not operate properly if air enters the system.
Note:With fuel tank levels above 3⁄4 tank
it may be necessary to loosen the bowl three
turns before opening the drain. This will
actuate an anti-siphon valve at the fuel and
water separator inlet and prevent the fuel
from siphoning out of the tank.
Note:A loose drain valve can allow air to
enter the fuel system and cause drivetrain
issues. The engine will not operate properly.
Be sure that you fully tighten the drain valve.
1. Stop your vehicle and shut off the
engine.
2. Locate the diesel fuel conditioner
module and place an appropriate
container under the drain port.
E163360
232
Maintenance