SECTION 13: WHEELS, HUBS & TIRES
16
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version
‒
Rev.2 April 2016)
WARNING
All tires on the same axle should always be
inflated to the same pressure. There should
not be a difference in pressure between right
and left tires on the same axle.
A 5-psi (35-kPa) under-inflation in one front
tire can not only reduce vehicle
maneuverability, but will create steering
hazards which can lead to an accident.
10.2 TIRE MATCHING
Unmatched tires on drive axle will cause tire
wear and scuffing, as well as possible damage
to the drive unit. Consequently, we recommend
that tires be matched within 1/8" (3 mm) of the
same rolling radius.
NOTE
It is recommended that all tires on coach be of
the same type.
10.3 WHEEL BALANCING
Before balancing, wheels must be clean and
free from all foreign matter. The tires should be
in good condition and properly mounted. An
unbalanced wheel can be due to a bent wheel or
improper mounting. Before removing the wheel
from the vehicle, check for swaying movement
and if necessary, check the wheel lateral runout
as outlined under heading
"Wheel Straightness
Check".
WARNING
When balancing wheel and tire assemblies, it
is strongly recommended to closely follow
instructions covering the operation of wheel
balancer.
CAUTION
A maximum of 16-oz (450 g) of balancing
weight is recommended. If more weight is
necessary, check and correct the cause.
10.4 TIRE ROTATION
Radial tires should be rotated only when
necessary. If the tires are wearing evenly, there
is no need to rotate. If irregular wear becomes
apparent or if the wear rate on the tires is
perceptively different (from axle to axle), then
tires should be rotated in such a manner as to
alleviate the condition.
NOTE
There is no restriction on crisscross rotation.
