MCi Crusader II 1989 Maintenance Manual page 460

Date
1-1-89
Page
15-1
MC-9 MAINTENANCE MANUAL
Figure 15-1. Tire, Wheel, Drum and Hub.
WHEELS, HUBS AND TIRES
Wheels supplied on the coach vary according to the
specifications of the user. They are of standard type and manu-
facture and may have either 2-piece or 3-piece rims. Either tube
type or tubeless tires may be used.
Standard wheels are 22.50 x 8.25" (571.5 x 209.5 mm) for
tires of the following sizes: 12.00" x 22.50" (304.8 x 571.5 mm),
12.5" x 22.5" (317,5 x 571.5 mm) or 12.75A x 22.5 (323.9 x
571.5 mm). See figure 15-1.
The spare wheel and tire are carried in a compartment
immediately behind the front bumper. Access is gained by
releasing retaining locks located directly beneath the bumper,
then pulling bumper out and up. Bumper will lock in the open
position. Make sure that both bumper locks are firmly in place
after closing compartment door.
WHEEL MAINTENANCE
Maintenance consists of periodic checks to see that wheel
nuts are tightened to the proper torque. With a new coach, or
after new wheels have been installed. stud nuts should be
tightened every 100 miles (161 km) for the first 500 miles (805
km) to allow setting in of clamping surfaces.
Standard equipment consists of stud-mounted wheels; hub-
mounted wheels are optional.
Stud-mounted wheels rely on the cone-shaped wheel nuts
to hold the wheel on the hub in the proper location. After July
'85. all 96/102 series coaches have. on the front axles, five
cone-shaped wheel nuts and five flanged wheel nuts, installed
alternately. Rear and trailing wheels have only the cone-
shaped wheel nuts.
When installing front wheels (stud-mounted) always install •
and tighten the cone-shaped wheel nuts firstto property center
the wheel. Tighten the nuts progressively. on alternate sides of
the wheel. Final tightening should be with a torque wrench to
450-500 lb-ft (610-678 Nm) torque. The torque requiremenfls
for both the cone-shaped and the flanged wheel nuts.
CAUTION: Do not intermix stud-mount
nuts with nuts used on hub-mounted
wheels. Stud-mounted wheels must be
installed with cone-shaped and flanged
stud nuts. Rear and trailing axle stud-
mounted wheels must be installed with the
cone-shaped stud nuts.
Hub-mounted wheels (optional equipment) are mounted
with a close tolerance fit of the wheel over the axle hub flange.
The nuts used with_ hub-mounted wheels are flat Cone-
shaped or flanged nuts are not used with hub-mounted wheels.
the nuts are to be tightened progressively on alternate sides of
the wheel. Final tightening should be with a torque wrench to
450-500 lb-ft (610-678 Nm) turQue.
CAUTION: Do not intermix stud nuts for
hub-mounted wheels with those intended
tor use with stud-mounted wheels. Do not
use stud-mount wheels in place of hub-
mount wheels. Do not adapt either type of
wheel for a different mounting.
Wheel studs and·nuts must be kept free from grease and oil.
No lubricant should be used. except for the cap nut condition
described below.