Section 13: WHEELS, HUBS & TIRES
PA1553
8
8. Assemble axle flange to axle using a new
gasket. Apply sealant in stud area. After both
wheels have been assembled according to
above procedure, fill the differential with the
recommended lubricant to the proper factory
recommended level.
NOTE
During regular inspection, do not forget to
check lubricant level in differential. Clean
thoroughly or replace vent as required.
10. CHANGING A FLAT TIRE
In case of a flat tire, turn ON the hazard flashers
and bring the vehicle to a stop on the side of the
road. Apply the parking brake. Make sure the
vehicle is parked safely away from traffic. Set up
the triangular reflectors in accordance with
applicable highway regulations.
We suggest that you do not attempt to change a
wheel. First, the wheel and tire are very heavy
and usually there is no space available to put
the removed flat. Second, the wheel nuts,
especially those on inner dual, can become very
tight after being on for only a short time. Often a
heavy air wrench is required to get these nuts
loose. We suggest you get help via CB radio or
cellular phone. There are tire service trucks all
over the country that can bring a wheel and
make the change safely.
NOTE
Bus shell vehicles contain no spare wheel.
Access to compartment is obtained by pulling
the release handle located in the front service
compartment.
WARNING
The reclining bumper compartment has not
been designed for storage. Never leave loose
objects in this area since they may interfere
with steering linkage mechanism. Make sure
bumper is safely locked in place after closing
the compartment.
11. TIRE MAINTENANCE
The most critical factor in tire maintenance is
proper inflation (Fig. 6). No tire is impervious to
loss of air pressure. To avoid the hazards of
under inflation, always maintain tires at their
recommended inflation pressure. Improper
inflation decreases tire life.
An under inflated tire builds up heat that can
cause sudden tire destruction, resulting in
improper vehicle handling and possible loss of
vehicle control. At least once a week, before
driving (when tires are cold), check inflation
pressure on all the tires, including the spare tire.
This is especially important in cases when
different drivers operate the vehicle.
WARNING
Failure to maintain correct tire inflation
pressure may result in sudden tire destruction,
improper vehicle handling, and will cause
rapid and irregular tire wear. Inflation pressure
should be checked weekly and always before
long distance trips.
11.1 INFLATION PRESSURE
The condition and pressure of the tires can
greatly affect both useful tire life and road safety.
At regular intervals, verify the tire pressures.
Use an accurate tire pressure gauge when
checking inflation pressures. Never exceed the
maximum inflation pressure specified on each
tire.
NOTE
Inflation pressure should be checked when
tires are cold. Cold tire inflation pressure can
be measured when a vehicle has not been
driven for at least 3 hours or less than 1 mile
(1.6 km). Driving, even for a short distance,
causes tires to heat up and air pressure to
increase. Check inflation pressure on all tires
(including the spare tire) using an accurate tire
gauge.
NOTE
The recommended tire inflation pressures are
given in the applicable documents supplied
with the vehicle. In addition, cold tire inflation
pressures are listed on the Department of
Transport's certification plate, affixed on the
panel behind the driver’s seat. For special tire
selection, a “PRÉVOST COACH SPECIAL
SPECIFICATION” chart is supplied with the
vehicle and is affixed on the left wall near the
driver’s seat. Remember, tire inflation
pressure must be adjusted according to
vehicle loading - see table in "Coach Final
Record"
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