Ford F-650/750 (2018 year). Manual — part 34

LOAD LIMIT

WARNINGS

Do not exceed the GVWR or
the GAWR specified on the

Safety Compliance Certification
Label.

Do not use replacement tires
with lower load carrying

capacities than the original tires
because they may lower the
vehicle's GVWR and GAWR
limitations. Replacement tires
with a higher limit than the
originals do not increase the
GVWR and GAWR limitations.

Exceeding any vehicle weight
rating limitation could result

in serious damage to the vehicle
and/or personal injury.

Every vehicle manufactured by
Ford Motor Company is supplied
with information on the Safety
Compliance Certification Label,
located on either the B-pillar or
the driver’s door edge, listing the
maximum loading for the vehicle
(GVWR), and its axle systems
(GAWR) at the tire to ground
interface.

Example only:

E210937

Under no circumstances should
your vehicle be loaded in excess
of the GVWR or GAWR. It is the
operator’s responsibility to ensure
that neither the axle capacities,
spring capacities, tire capacities
nor the vehicle rated GVWR is
exceeded.

Unloaded or Lightly Loaded
Vehicles

WARNING

When operating empty or
lightly loaded, sudden or hard

braking may induce wheel lockup
with loss of vehicle control and
the possibility of accident and
serious injury, especially on wet or
slippery road surfaces.

The braking system has been
designed to safely stop your
vehicle when fully loaded to its
GVWR.

AIR SUSPENSION

(If Equipped)

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.

We do not recommend performing, or
approve of, suspension conversions.
However, we understand that, on occasion,
others install aftermarket add-on
suspensions on the truck chassis that allow
operator control for weight transfer from
other axles (such as air lift axles).

TOWING A TRAILER

WARNINGS

Do not exceed the GVWR or
the GAWR specified on the

certification label.

Towing trailers beyond the
maximum recommended

gross trailer weight exceeds the
limit of the vehicle and could
result in engine damage,
transmission damage, structural
damage, loss of vehicle control,
vehicle rollover and personal
injury.

Your vehicle may have electrical
items, such as fuses or relays,
related to towing. See Fuses
(page 165).
Your vehicle's load capacity
designation is by weight, not by
volume, so you cannot necessarily
use all available space when
loading a vehicle.

Towing a trailer places an extra
load on your vehicle's engine,
transmission, axle, brakes, tires
and suspension. Inspect these
components periodically during,
and after, any towing operation.

Load Placement

To help minimize how trailer
movement affects your vehicle
when driving:
•

Load the heaviest items closest
to the trailer floor.

•

Load the heaviest items
centered between the left and
right side trailer tires.

•

Load the heaviest items above
the trailer axles or just slightly
forward toward the trailer
tongue. Do not allow the final
trailer tongue weight to go
above or below 10-15% of the
loaded trailer weight.

When driving with a trailer or
payload, a slight takeoff vibration
or shudder may be present due to
the increased payload weight.
Additional information regarding
proper trailer loading and setting
your vehicle up for towing is
located in another chapter of this
manual. See Load Limit (page
140).

You can also find information in
the RV & Trailer Towing Guide
available at your authorized
dealer, or online.

RV & Trailer Towing Guide Online

http://www.fleet.ford.com/towing-guides/

Website