Peterbilt 325 2017, Operator'S Manual

Page: 192 / 392

AXLE
Axle Creep Rating Definition
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
exceeded.
Contact your dealer or axle
manufacturer to determine what
the creep rating is for your particular
axle(s) and configuration. Creep
ratings are generally limited to the
following:
•
Tandem rear axles only
•
Straight trucks only
•
Maximum spring mount
centers per axle manufacturers
specifications
•
Maximum tire static loaded radius
(SLR) per axle manufacturers
specifications
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 auxil-
iary axle(s) raised/unloaded. Failure
to lower the axle(s) can overload
the frame and remaining axles, and
could cause equipment 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 re-
sult 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. Fail-
ure to comply may result in death,
personal injury, equipment or prop-
erty damage.
CAUTION
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 war-
ranty, and can cause equipment
damage.
4-52
Y53-6060-1C1 (03/17)
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