AXLE
Gross Axle Weight Rating (GAWR)
and the load that is being carried. See
Vehicle
Loading on page 1-34.
The vehicle
will have switches on the
dash to control the position of the
auxiliary axles. In certain situations,
however, the system will override the
controls to protect the axle system.
Any liftable and steerable auxiliary
axles will rise off of the ground when
the parking brakes are engaged or
when the vehicle is put in reverse.
If the liftable auxiliary axle is not a
steerable axle, then it will remain in the
down position when activated by the
dash mounted switch.
Operating the
auxiliary liftable axles
must be performed in a manner that
does not exceed the axle creep rating.
Axle creep ratings are weight and
speed limits that are allowed while
the vehicle is fully loaded (in excess
of the vehicle’s standard GAWR) and
the axle is in its up position. Axle
creep ratings
are assigned by the
axle manufacturer and are based on
axle model and intended service of
the vehicle. Contact an authorized
dealership if you are unable to identify
the axle creep rating of this vehicle.
• Liftable/steerable (axle lift
calibration required)
• Liftable/non-steerable (axle lift
calibration required)
• Non-liftable (some suspensions
require dump valve calibration)
WARNING!
Do not operate or park the vehicle
with auxiliary axles in the down/loaded
position when vehicle is unladen, or
is being unloaded. Raise or dump air
into driver-controlled auxiliary axle(s)
prior to unloading vehicle. Failure
to do so can result in loss of vehicle
control or rollaway that may result in
death, personal injury, equipment or
property damage.
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(04/13) Y53-6047–2C 4-43
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