2023 FORD F650/750 height

2. Release the button and pull down on
the height adjuster to make sure it is
locked in place.SEATBELT WARNING LAMP
AND INDICATOR CHIME
E71880
This lamp illuminates and an
indicator chime will sound if the
driver seatbelt has not been
fastened when the vehicle's ignition is
turned on.
Conditions of operation
Then If
The seatbelt warning lamp illuminates and
the indicator chime sounds for a few
seconds. The driver seatbelt is not buckled before
the ignition switch is turned to the on posi-
tion...
The seatbelt warning lamp and indicator
chime turn off. The driver seatbelt is buckled while the
warning lamp is illuminated and the indic-
ator chime is sounding...
The seatbelt warning lamp and indicator
chime remain off. The driver seatbelt is buckled before the
ignition switch is turned to the on position...
SEATBELT REMINDER
Belt-Minder™
This feature supplements the safety belt
warning function by providing additional
reminders that intermittently sound a tone
and illuminate the safety belt warning light
when you are in the driver seat or you have
a front seat passenger and a safety belt is
unbuckled.The system uses information from the
front passenger sensing system to
determine if a front seat passenger is
present and therefore potentially in need
of a warning. To avoid activating the
Belt-Minder feature for objects you place
in the front passenger seat, only the front
seat passengers receive warnings as
determined by the front passenger sensing
system.
If the Belt-Minder warnings expire
(warnings for about five minutes) for one
passenger (driver or front passenger), the
other passenger can still cause the
Belt-Minder feature to turn on.
42
Seatbelts

4. While the safety belt warning light is
on, buckle and then unbuckle the
safety belt. After Step 4, the safety belt
warning light flashes for confirmation.
• This will switch the feature off for that
seating position if it is currently on.
• This will switch the feature on for that
seating position if it is currently off.
CHILD RESTRAINT AND
SEATBELT MAINTENANCE
Inspect the vehicle seatbelts and child
safety seat systems periodically to make
sure they work properly and are not
damaged. Inspect the vehicle and child
restraint seatbelts to make sure there are
no nicks, tears or cuts. Replace if
necessary. All vehicle seatbelt assemblies,
including retractors, buckles, front seatbelt
buckle assemblies, buckle support
assemblies (slide bar-if equipped),
shoulder belt height adjusters (if
equipped), shoulder belt guide on seat
backrest (if equipped), child safety seat
LATCH and tether anchors, and attaching
hardware, should be inspected after a
crash. Read the child restraint
manufacturer's instructions for additional
inspection and maintenance information
specific to the child restraint.
We recommend that all seatbelt
assemblies in use in vehicles involved in a
crash be replaced. However, if the crash
was minor and an authorized dealer finds
that the belts do not show damage and
continue to operate properly, they do not
need to be replaced. Seatbelt assemblies
not in use during a crash should also be
inspected and replaced if either damage
or improper operation is noted.
Properly care for seatbelts. See Vehicle
Care (page 262).
SEATBELT EXTENSIONS
WARNING: Persons who fit into
the vehicle's seatbelt should not use an
extension. Unnecessary use could result
in serious personal injury in the event of
a crash.
WARNING: Only use extensions
provided free of charge by our dealers.
The dealer will provide an extension
designed specifically for this vehicle,
model year and seating position. The use
of an extension intended for another
vehicle, model year or seating position
may not offer you the full protection of
your vehicle's seatbelt restraint system.
WARNING: Never use seatbelt
extensions to install child restraints.
WARNING: Do not use a seatbelt
extension with an inflatable seatbelt.
WARNING: Do not use extensions
to change the way the seatbelt fits
across the torso, over the lap or to make
the seatbelt buckle easier to reach.
If, because of body size or driving position,
it is not possible to properly fasten the
seatbelt over your lap and shoulder, an
extension that is compatible with the
seatbelts is available free of charge from
our dealers. Only use our seatbelt
extensions made by the original equipment
seatbelt manufacturer with our seatbelts.
Ask your authorized dealer if your extension
is compatible with your vehicle restraint
system.
44
Seatbelts

Note:Using much larger tires or equipping
vehicle accessories such as snowplows can
modify your vehicle's ride height and
degrade automatic high beam control
performance.
A camera sensor, centrally mounted
behind the windshield of your vehicle,
continuously monitors conditions to turn
the high beams on and off.
Once the system is active, the high beams
turn on if:
• The ambient light level is low enough.
• There is no traffic in front of your
vehicle.
• The vehicle speed is greater than
approximately 32 mph (51 km/h).
The system turns the high beams off if:
• The ambient light level is high enough
that high beams are not required.
• The system detects an approaching
vehicle's headlamps or tail lamps.
• The vehicle speed falls below
approximately 27 mph (44 km/h).
• The system detects severe rain, snow
or fog.
• The camera is blocked.
Switching the System On and Off
Switch the system on using the information
display. See Information Displays (page
70).
E142451
Switch the lighting control to the
autolamps position. See Autolamps
(page 55).
Overriding the System
Push the lever away from you to switch
between high beam and low beam.
Automatic High Beam Indicator
The indicator illuminates to
confirm when the system is
ready to assist.
DIRECTION INDICATORS
3E3131431
Push the lever up or down to use
the direction indicators.
Note:Tap the lever up or down to make the
direction indicators flash three times.
INTERIOR LAMPS
The lamps turn on under the following
conditions:
• You open any door.
• You press a remote control button.
57
Lighting

Air-Ride Seat
Type 1
E208778
Rotate the handle to adjust the
angle of the seat backrest. A.
Pull the control up to raise the
seat. Push the control down to
lower the seat. B.
Move the lever to the left to
move the seat forward or
backward. Release the lever to
lock the seat in position. C
Type 2
E298809E298809
Rotate the handle to adjust the angle of the seat backrest. A.
Pull the lever up to inflate the lumbar. Push the lever down to deflate the lumbar. B.
Pull the lever up to raise the seat height. Push the lever down to lower the seat
height. C.
Move the lever to the left to move the seat forward or backward. Release the
lever to lock the seat in position. D
92
Seats

AIR SUSPENSION
Note:Do not operate your vehicle without
air in the suspension springs. Operating your
vehicle without air in the suspension springs
damages the suspension, degrades ride
performance and may cause property
damage.
The air suspension system automatically
adjusts to different loads to maintain a
constant frame height, allows for ease of
vehicle loading, provides improved vehicle
ride, and increased driver comfort.
Air Suspension Dump Button
E213409
Note:The suspension dumps air when the
ignition is in the accessory or on position,
but fills only when the ignition is in the on
position.
A button located on the instrument panel
controls the system. It operates only when
the ignition is in the accessory or on
position and the air tanks have sufficient
pressure to fill the air springs. When you
turn off the ignition, the suspension
remains in whatever state it was last set.
Pressing and holding the button for two
seconds exhausts air from the air springs,
lowering the frame for loading. Pressing
and holding the button for two seconds
fills the air springs so your vehicle remains
at normal ride height.
System Indicator Light
The air suspension indicator light
illuminates when using the button to
release air pressure in the rear air springs.
Never drive your vehicle when the warning
lamp is illuminated and there is low (or no)
air pressure in the springs.
Connecting and Disconnecting a
Trailer with Air Suspension and Air
Suspension Dump Button
When connecting to a trailer:
• Press and hold the button for two
seconds to exhaust air from the air
suspension system.
• Press and hold the button for two
seconds, and then raise the landing
gear after making the connection to
the trailer.
When disconnecting the trailer:
• Lower the landing gear, and then press
and hold the button for two seconds.
• Disconnect the brake hoses, trailer-side
and rear light connectors, then pull the
release lever on the fifth wheel.
You must fill the air springs before
operating with a trailer or operating in the
bobtail mode.
Suspension Conversions
WARNING: When operating a
loaded vehicle, the driver must keep all
adjustable axles on the ground at all
times, supporting their share of the
vehicle’s load. Failure to do so can
overload other axles, tires, wheels,
springs, steering components, brakes
and frames, resulting in early component
failure, loss of vehicle control, possible
property damage and personal injury.
176
Load Carrying

Headlamp Aiming Target
E142592
8 ft (2.4 m) A
Center height of lamp to ground B
25 ft (7.6 m) C
Horizontal reference line D
Vertical Aim Adjustment Procedure
1. Park the vehicle directly in front of a
wall or screen on a level surface,
approximately 25 ft (7.6 m) away.
2. Measure the height of the headlamp
bulb center from the ground and mark
an 8 ft (2.4 m) horizontal reference line
on the vertical wall or screen at this
height.
Note:To see a clearer light pattern for
adjusting, you may want to block the light
from one headlamp while adjusting the
other.
3. Turn on the low beam headlamps to
illuminate the wall or screen and open
the hood.
E142465
4. On the wall or screen you will observe
a flat zone of high intensity light
located at the top of the right hand
portion of the beam pattern. If the top
edge of the high intensity light zone is
not at the horizontal reference line, the
headlamp will need to be adjusted.
E163806E163806EE163806
5. Locate the vertical adjuster on each
headlamp. Using a Phillips #2
screwdriver, turn the adjuster either
clockwise or counterclockwise in order
to adjust the vertical aim of the
headlamp.
6. Repeat Steps 3 thru 5 to adjust the
other headlamp.
7. Close the hood and turn off the lamps.
Horizontal Aim Adjustment
Horizontal aim is not required for this
vehicle and is not adjustable.
248
Maintenance

Follow the tire manufacturer's
recommended cold inflation pressure for
the tire size, load range (ply rating) and
steer axle loading typical for their operation
(each steer axle tire equals ½ steer axle
loading).
Special applications may warrant a setting
based on experience with the type of tire
operating loads and conditions. Radial tires
are more sensitive to toe-in setting than
bias ply tires. Fine tuning school bus
alignment to line-haul truck standards
does not drastically improve tire tread life.
STEERING SYSTEM
INSPECTION
WARNING: Failure to maintain the
steering system in proper condition can
cause reduced steering ability resulting
in property damage, personal injury or
death.
Note:Have any steering problems
immediately corrected by a qualified service
technician.
Ask your service technician to examine the
steering mechanism. Only minor
adjustments may be necessary.
Regular inspections should include:
• Checking the tie rod, drag link end
clamp bolts and ball joints for proper
tightness.
• Checking for installation and spread of
cotter pins and tightness of nuts at
both ends of the tie rod and drag link.
• Checking that the pitman arm (steering
arm at steering gear) mounting is tight
and locked. Check system for leaks or
hose chafing. Repair immediately, if
necessary.• Maintaining proper steering gear and
power steering pump lubricant levels.
• Checking steering column joint bolts
and steering linkage, particularly for
body-to-chassis clearance.
Steering Column Joint Bolts
As a good maintenance practice, check
steering column joint bolt tightness every
60,000 mi (96,000 km) or annually,
whichever occurs first. Do not overtighten
the bolts.
Hydraulic System
Whenever draining and refilling the power
steering's hydraulic system for any reason,
bleed air from the system before returning
the vehicle to service. Failure to bleed the
hydraulic system properly can result in
degradation of power system performance.
Consult an authorized dealer who is aware
of the proper procedures for filling and
bleeding the system.
SUSPENSION SYSTEM
INSPECTION
Note:Do not adjust air suspension height
to any setting other than the specified
setting. Altering the height setting changes
the driveline angle and may result in
unwarrantable component damage, such
as transmission component damage.
Verify drive axle air suspension height and
height control valve performance at engine
oil change intervals.
Periodically check:
• Condition of spring leaves for evidence
of fatigue, bending or breakage.
• Condition of suspension mounting
brackets and bushings.
• Torque rod mounting fasteners for
tightness.
259
Maintenance

• For proper suspension alignment.
Maintain proper alignment at all times.
• U-bolts. After the chassis has been
operating under load for 1,000 mi
(1,600 km) or six months (whichever
comes first), the U-bolt nuts must be
re-torqued. Re-torque the U-bolt nuts
every 37,000 mi (60,000 km)
thereafter. Clean and lubricate the
U-bolt and nut threads and seats to
make sure a like new condition when
re-torqueing. See Spring U-Bolt
Check (page 260).
FRAME AND TOW HOOK
INSPECTION
Your vehicle's chassis is manufactured
with frame rails of either HSLA steel or
heat-treated steel. Handle each in a
specific manner to make sure maximum
service life. Consult the service manual or
an authorized dealer before attempting
frame repair or modification.
It is important, particularly on vehicles that
use tow hooks frequently, to inspect the
front and rear tow hooks for damage or a
loose mounting.
REAR AXLE FLUID CHECK
Your rear axle may have an optional
synthetic lubricant that allows the use of
extended service intervals. A tag on the
filler plug identifies the use of the synthetic
lubricant.
Only use a lubricant that meets
manufacturer specifications. Use of a
non-approved rear axle lubricant may
cause internal axle component damage.
See Rear Axle Fluid Capacity and
Specification (page 305).
Checking the Fluid Level
1. Park your vehicle on level ground.2. Set the parking brake and shift into
position neutral (N) or park (P). Turn
the engine off.
3. Clean any dirt from around the axle
filler plug.
4. Remove the filler plug and inspect the
lubricant level. It should be at the
bottom of the filler plug opening.
5. Add lubricant, if necessary, through the
filler plug opening.
6. Clean and install the filler plug securely.
Changing the Fluid
Note:Drain the rear axle while the lubricant
is warm.
1. Park your vehicle on level ground.
2. Set the parking brake and shift into
position neutral (N) or park (P). Turn
the engine off.
3. Clean any dirt from around the axle
filler and drain plugs.
4. Remove the filler and drain plugs. Drain
the lubricant into a suitable container.
Dispose of all used automotive fluids
in a responsible manner following your
local authorized standards.
5. Clean and install the drain plug
securely.
6. Add lubricant through the filler plug
opening.
7. Clean and install the filler plug securely.
SPRING U-BOLT CHECK
Check and tighten the U-bolt nuts after
your vehicle has been operated under load
for 1,000 mi (1,600 km) or six months,
whichever occurs first.
Check and tighten the U-bolt nuts every
37,000 mi (60,000 km).
Check and tighten the U-bolt nuts with
your vehicle at curb height and unloaded.
260
Maintenance