Peterbilt 325 2017, Operator'S Manual

Page: 193 / 392

AXLE
CAUTION
A change in tire size on either the
auxiliary axles or the drive/steer
axles can change the calibration
of the auxiliary axles.
If tires are
installed with a different loaded ra-
dius, the calibration procedure must
be repeated. Failure to do so can
cause equipment damage.
Liftable/Steerable or
Liftable/Non-Steerable Pusher
and/or Tag Axle Calibration
Procedure
Below are some general instructions
on how to adjust and calibrate the air
control valve for the auxiliary axles to
obtain the proper load distribution of
the axle(s). For additional operating
and maintenance instructions, see the
pusher or tag suspension manufacturer
literature in the glove box or contact
them directly.
NOTE
This procedure must be performed
prior to placing the vehicle into ser-
vice.
Setting the Pressure-to-Load Ratio
To obtain the desired axle load
distribution, you must correlate the
suspension air gauge pressure to the
actual axle load by scaling the axle
weight(s) and adjusting the pressure
to obtain the desired load. Once the
desired load or load range is achieved,
document the pressure-to-load ratio or
setting for future use.
(03/17) Y53-6060-1C1
4-53
4