operators_manual

3. To make the axle downshift, release
and depress the accelerator quickly
to increase the engine rpm. The
axle will shift to LOW range.
4. You are now in the LOW axle range
for rough terrain and heavy loads.
Shift the transmission normally to
maintain the desired speed.
What is an Auxiliary Axle
Adjustable auxiliary axles (commonly
known as Pusher or Tag axles) can add to
the productivity of the vehicle by increasing
the load capabilities of the vehicle when
they are in the deployed (down) position.
There are different configurations of axles
with different functionality (liftable versus
steerable). Without the extra axle, the
excessive weight can reduce the service
life of vehicle components such as, but not
limited to, the frame rail, axles, suspension
and brakes.
Operation of the auxiliary axles includes
the proper maintenance of the system and
calibration of its controls. Operating the
auxiliary axles will also require a firm
understanding of the Gross Axle Weight
Rating (GAWR) and the load that is being
carried.
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. Replace with new text: For Self
Steering Lift Axles, the axle will raise when
the park brakes are applied or if the vehicle
is placed in reverse. For Non-Steer Lift
Axles, the axle will only automatically raise
if the park brakes are applied and there are
no park brakes on the lift axle. Non-Steer
Lift Axles do not automatically raise when
the vehicle is placed in reverse.
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 aux-
iliary axles in the down/ loaded position
when vehicle is unladen, or is being unload-
ed. 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 dam-
age.
See Also
Vehicle Loading on page 24
DRIVING - Axle and Suspension
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