SECTION 13: WHEELS, HUBS & TIRES
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version
‒
Rev.2 April 2016)
3
1. WHEELS
The vehicle is equipped with hub-mounted
wheels, all studs and nuts have right-hand
threads. Steel wheels are installed on the
vehicle and are mounted with radial tubeless
tires.
All wheel dimensions are 22.50 X 9.0 inches
(571.5 X 228.6 mm) for 315/80 R22.5 tires
FIGURE 1:STEEL WHEEL ARRANGEMENT
13001
2. WHEEL MAINTENANCE
Wheel maintenance consists of periodic
inspections. Check all parts for damage and
make sure that wheel nuts are tightened to the
proper torque. In the case of a new vehicle, or
after a wheel installation, stud nuts should be
tightened every 100 miles (160-km) for the first
500 miles (800-km) to allow setting in of
clamping surfaces.
Wheel studs and nuts must be kept free from
grease and oil. No lubricant whatsoever should
be used. Cleanliness of the wheel and its rotor
mating surfaces is important for proper wheel
mounting.
However, for hub mounted wheels, it is
recommended to add some rust protection
lubricant on the pilot diameter of the hub (to
facilitate future removal).
It is also important that wheel stud nuts be
tightened alternately on opposite sides of the
wheel. Refer to Figure 2 for the suggested
tightening sequence.
2.1 INSPECTION
Tighten stud nuts progressively as shown in
Figure 2. The final tightening should be done
with a torque wrench. Tighten stud nuts to 450 -
500 lbf-ft (610 - 680 Nm) for steel wheels.
FIGURE 2: TIGHTENING SEQUENCE
13018
2.2 SINGLE WHEEL REMOVAL
1. Stop engine and apply parking brake.
2. Loosen wheel nuts about one turn (do not
remove the nuts). This is not necessary if
equipped with hydraulic powered gun.
