2023 FORD F650/750 ECU

• Shift to a lower gear when driving down
a long or steep hill. Do not apply the
brakes continuously, as they may
overheat and become less effective.
• If your transmission is equipped with
the Tow/Haul feature, use this feature
when towing. This provides engine
braking and helps eliminate excessive
transmission shifting for optimum fuel
economy and transmission cooling.
• Allow more distance for stopping with
a trailer attached. Anticipate stops and
brake gradually.
FIFTH WHEEL OPERATION
WARNING: Failure to follow the
fifth wheel manufacturer’s instructions
for hooking and unhooking as well as
sliding the fifth wheel could result in an
accident, personal injury or death.
WARNING: When the tractor and
trailer are parked unattended, the trailer
brake hand control should never be used
to apply the brake, since air may leak
from the system, allowing vehicle
movement, resulting in possible property
damage, personal injury or death.
Before hook-up, make sure:
• The fifth wheel jaws are fully open.
• The fifth wheel is fully tilted back to
prevent body damage when the tractor
is backed under a trailer.
• You block the trailer wheels and adjust
and apply the trailer spring brakes.
Never chase a trailer.
• The brake hoses and light cords are
clear of the fifth wheel.
Hook-up
1. Back the tractor squarely under the
trailer, engaging the fifth-wheel jaws
on the kingpin. Always back up slowly;
make sure the trailer is neither too high
nor too low. Avoid backing under the
trailer from an angle.
2. Connect the service and emergency
brake hoses and trailer light connector.
3. Inspect the jaws of the fifth wheel to
be sure they have fully closed on the
trailer kingpin and the trailer plate is
resting securely on the fifth wheel.
4. Make sure the coupler release lever is
in the locked position.
5. Charge the trailer brake system. Set
the trailer brakes, with either the hand
valve or tractor protection valve. Pull
against the trailer for an extra check of
proper hook-up. Do not pull hard
enough to damage or strain the
equipment.
6. Set the tractor parking brakes and fully
raise the trailer landing gear.
7. Check the operation of all trailer lights
and correct any lights that may be
faulty.
Un-hook
1. Try to keep the tractor and trailer in a
straight line.
2. Apply the parking brakes.
3. Lower the trailer landing gear, making
sure it is on solid, level ground. The
weight of the trailer is to be on the
landing gear.
4. Block the trailer wheels.
5. Disconnect the brake hoses and light
cords. Be sure hoses and cords are
clear.
6. Pull coupler release lever to disengage
the fifth wheel jaws.
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Towing

Ford Motor Company produces a towing
manual for all authorized tow truck
operators. Have your tow truck operator
refer to this manual for proper hook-up
and towing procedures for your vehicle.
It is acceptable to have your two-wheel
drive vehicle towed with the front wheels
on the ground (without dollies) and the
rear wheels off the ground.
TOWING POINTS
WARNING: Using recovery hooks
is dangerous and should only be done by
a person familiar with proper vehicle
recovery safety practices. Improper use
of recovery hooks may cause hook failure
or separation from the vehicle and could
result in serious injury or death.
WARNING: Always slowly remove
the slack from the recovery strap prior
to pulling. Failure to do so can introduce
significantly higher loads which can
cause the recovery hooks to break off, or
the recovery strap to fail which can cause
serious injury or death.
WARNING: Never link two straps
together with a clevis pin. These heavy
metal objects could become projectiles
if the strap breaks and can cause serious
injury or death.
Your vehicle comes equipped with
frame-mounted front recovery hooks.
These hooks should never have a load
applied to them greater than the gross
vehicle weight rating of your vehicle.Before using recovery hooks:
• Make sure all attaching points are
secure and capable of withstanding
the applied load.
• Never use chains, cables or tow straps
with metal hook ends.
• Only use recovery straps that have a
minimum breaking strength two to
three times the gross vehicle weight of
the stuck vehicle.
• Make sure the recovery strap is in good
condition and free of visible cuts, tears
or damage.
• Use a damper device such as a tarp,
heavy blanket or piece of carpet
draped over the recovery strap to help
absorb the energy in the event the
strap breaks.
• Make sure the stuck vehicle is not
loaded heavier than its gross vehicle
weight rating specified on the
certification label.
• Always align the tow vehicle and stuck
vehicle in a straight line (within 10
degrees).
• Keep bystanders to the sides of the
vehicle, at a distance of at least twice
the length of the recovery strap. This
helps avoid injury from the hazard of a
recovery hook or strap breaking, or a
vehicle lurching into their path.
193
Roadside Emergencies

Additional Assistance
If you have questions or concerns, or are
unsatisfied with the service you are
receiving, follow these steps:
1. Contact your Sales Representative or
Service Advisor at your selling or
servicing authorized dealer.
2. If your inquiry or concern remains
unresolved, contact the Sales Manager,
Service Manager or Customer Relations
Manager.
3. If you require assistance or clarification
on Ford Motor Company policies,
please contact the Ford Customer
Relationship Center.
In order to help us serve you better, please
have the following information available
when contacting a Customer Relationship
Center:
• Vehicle Identification Number.
• Your telephone number (home and
business).
• The name of the authorized dealer and
city where located.
• The vehicle’s current odometer reading.
In some states within the United States,
you must directly notify Ford in writing
before pursuing remedies under your
state's warranty laws, and Ford is also
allowed a final repair attempt.
Additionally, in some states within the
United States, a consumer has the option
of submitting a warranty dispute to the
BBB Auto Line before taking action under
the Magnuson-Moss Warranty Act, or to
the extent allowed by state law, before
pursuing replacement or repurchase
remedies provided by certain state laws.
This dispute handling procedure is not
required prior to enforcing state created
rights or other rights which are independent
of the Magnuson-Moss Warranty Act or
state replacement or repurchase laws.IN CALIFORNIA (U.S. ONLY)
California Civil Code Section 1793.2(d)
requires that, if a manufacturer or its
representative is unable to repair a motor
vehicle to conform to the vehicle’s
applicable express warranty after a
reasonable number of attempts, the
manufacturer shall be required to either
replace the vehicle with one substantially
identical or repurchase the vehicle and
reimburse the buyer in an amount equal to
the actual price paid or payable by the
consumer (less a reasonable allowance
for consumer use). The consumer has the
right to choose whether to receive a refund
or replacement vehicle.
California Civil Code Section 1793.22(b)
presumes that the manufacturer has had
a reasonable number of attempts to
conform the vehicle to its applicable
express warranties if, within the first 18
months of ownership of a new vehicle or
the first 18,000 mi (29,000 km), whichever
occurs first:
1. Two or more repair attempts are made
on the same non-conformity likely to
cause death or serious bodily injury OR
2. Four or more repair attempts are made
on the same nonconformity (a defect
or condition that substantially impairs
the use, value or safety of the vehicle)
OR
3. The vehicle is out of service for repair
of nonconformities for a total of more
than 30 calendar days (not necessarily
all at one time).
In the case of 1 or 2 above, the consumer
must also notify the manufacturer of the
need for the repair of the nonconformity
at the following address:
Ford Motor Company
16800 Executive Plaza Drive
Mail Drop 3NE-B
Dearborn, MI 48126
195
Customer Assistance

Front brakes
Inspect for cracked, worn or frayed hoses, and that all coup-
lings are secure. Hoses
Verify that there are no cracks or dents, and that the cham-
bers are securely mounted. Brake chambers
Inspect for broken, loose or missing parts. Slack adjusters
Note: The angle between the push rod and adjuster arm
should be approximately 90 degrees when the brakes are
applied. When pulled by hand, the push rod should not move
more than approximately 1 in (2.5 cm).
Verify that there are no cracks, dents, holes, and no loose or
missing bolts and that the brake linings are not worn,
dangerously thin or contaminated by lubricant. Drums
Front wheels
Inspect for damaged or bent rims. They should not have
welding repairs, and there should be no rust trails, which
indicate it is loose on the wheel. Rims
Verify all lug nuts are present and not loose (look for rust
trails around the lug nuts). There should be no cracks radiating
from the lug bolt holes or distortion of the bolt holes. Lug nuts
Inspect wheel hub oil seal for leaks and, if sight glass if
present, verify the oil level is adequate. Hub oil seals
Inspect for proper lubrication level if the hubcap has a trans-
parent window. If the hubcap does not have a transparent
window, remove the rubber fill-plug and inspect for proper
level. Oil-lubricated front
wheel bearings
Fuel area
Verify the tank(s) and cap(s) are secure and that there are
no leaks from the tank(s). Fuel tank(s)
Inspect for leaks from the tank(s). Leaks
214
Vehicle Inspection Guide

Diesel Exhaust Fluid (DEF) area
Verify the tanks and caps are secure and that there are no
leaks from the tanks. DEF tanks
Inspect for leaks from the tanks. Leaks
Underbody
Verify that the driveshaft is not bent or cracked and that all
driveshaft couplings are secure. Driveshaft
Verify that the visible outside parts are securely mounted and
that there are no cracks, holes or severe dents. Exhaust system
Inspect for cracks or bends in longitudinal frame members.
Verify there are no loose, cracked, bent, broken or missing
crossmembers or crossmember fasteners. Frame
Rear of vehicle
Verify there are no cuts, cracks, chafing or wear on the air
hoses and electrical line insulation. Listen for audible air leaks. Air hoses and electrical
lines
Verify air and electrical lines are not tangled, crimped or
pinched or being dragged against any truck parts. None of
the air or electrical line should be spliced or taped.
Inspect for corrosion on pins and in electrical sockets to verify
continuity and reduced heat build-up potential.
Verify the deck plate is clean, bolted securely to the frame
and is clear of loose objects. Deck plate
Verify that both brake lights illuminate when the pedal is
applied, each signal flashes and that the four-way flashers
work properly. Turns signals, brake
lights and flashers
Verify all exterior lights illuminate and are clean. Lights and reflectors
Verify reflectors are clean, unbroken and of proper color (red
on rear, amber elsewhere).
Verify running lights are clean and unbroken.
Note: Inspect rear running lights separately from signal,
flasher and brake lights.
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Vehicle Inspection Guide

Rear brakes
Inspect for cracked, worn or frayed hoses, and that all coup-
lings are secure. Hoses
Verify that there are no cracks or dents, and that the cham-
bers are securely mounted. Brake chambers
Inspect for broken, loose or missing parts. Slack adjusters
Note: The angle between the push rod and adjuster arm
should be approximately 90 degrees when the brakes are
applied. When pulled by hand, the push rod should not move
more than approximately 1 in (2.5 cm).
Verify that there are no cracks, dents, holes, and no loose or
missing bolts and that the brake linings are not worn,
dangerously thin or contaminated by lubricant. Drums
Rear wheels
Check for even separation of dual wheels, and that the tires
are not touching each other. Spacers
Inspect for damaged or bent rims. They should not have
welding repairs, and there should be no rust trails, which
indicate it is loose on the wheel. Rims
Verify all lug nuts are present and not loose (look for rust
trails around the lug nuts). There should be no cracks radiating
from the lug bolt holes or distortion of the bolt holes. Lug nuts
Trailer
If you are pulling a trailer, perform an
inspection of the trailer similar to that of
the tractor. The inspection should follow
trailer manufacturer recommendations
and should include at a minimum: general
condition, landing gear, doors, sides, lights,
reflectors, suspension, brakes, tires,
wheels, cargo placement, stability and
tie-downs.
Transmission
WARNING: If the unit starts in gear
and/or the neutral start switch is not
functioning correctly, the vehicle may
inadvertently move which could result
in property damage, personal injury or
death.
Regularly inspect the transmission's
neutral start switch. The engine should
only start in neutral (N) or park (P) (if
equipped with a park position).
217
Vehicle Inspection Guide

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