AXLE
4
Axle Creep Rating Denition
Creep Ratings
Low speed,
off-highway (work site)
axle loads, which exceed the standard
gross axle weight rating (GAWR) of a
particular axle.
Operator's using
vehicles equipped
with liftable auxiliary axles must
consider creep ratings when any
liftable axle is unloaded or in the raised
position. Liftable auxiliary axles should
only be raised (or unloaded) to improve
maneuverability in an off-road use or
when vehicle is unloaded.
NOTE
Axle Creep ratings MUST NOT be ex-
ceeded.
Contact your dealer or axle
manufacturer to determine what
the creep rating is for your particular
axle(s) and conguration. Creep
ratings are
generally limited to the
following:
• Tandem rear axles only
• Straight trucks only
• Maximum spring mount
centers per axle manufacturers
specications
• Maximum tire static loaded radius
(SLR) per axle manufacturers
specications
CAUTION
Always lower the axles as soon as
possible after receiving a load. Never
exceed 5 miles per hour when driving
with a load with the auxiliary axle(s)
raised/unloaded. Failure to lower the
axle(s) can overload the frame and re
-
maining axles, and could cause equip-
ment damage.
WARNING!
Never operate the vehicle with more
pressure in the lift axles than is nec
-
essary to carry the load, as deter-
mined by the calibration procedure
described. Failure to do so can result
in loss of traction and stability at the
steer and/or drive axles and can result
in increased braking distance, which
could cause loss of vehicle control
resulting in an accident. Failure to
comply may result in death, personal
injury, equipment or property damage.
Do not modify the air system and/or
control functionality on a factory in
-
stalled auxiliary axle(s). Modifying the
factory operation of the pusher and/or
tag axle(s) will void your warranty, and
can cause equipment damage.
CAUTION
4-44 Y53-6047–2C (04/13)
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