(2) All models except M127. The brake drum (fig. 4-23) is attached to the hub through a dished
brake drum adapter. The adapter is secured to the hub by 10 wheel studs and to the drum by 10 bolts,
Iockwashers, and nuts. One of these bolts also secures the inspection hole cover to the drum. The inspection
hole permits the brake lining clearance to be checked. A hub cap and gasket, fastened by six cap screws and
Iockwashers over the center of the hub, excludes moisture and foreign matter.
c. Wheels. Two offset disk-type wheels are mounted to each hub. The inside wheel is mounted with the
convex side out, and the other wheel is mounted with the concave side out. The inside wheel is mounted on
the wheel studs in the hub and secured by cap nuts. The outer wheel is mounted on the cap nuts and secured
by wheel nuts. The wheels have removable split lock rings to secure the tires to the wheel rims.
d. Tires. Tires are military pneumatic type, cross-country non-directional tread design, size 11.00 X 20,
12-ply rating with controlled bead. The tires are equipped with tubes and continuous flaps.
Pressure in all tires must be equal. When checking tire pressure, do not reduce pressure if tires are hot
unless pressure must be reduced to increase traction on ground in cross-country diriving or in operation over
sand. Tire inflation is as follows:
Highway driving - 60 PSI
Cross-country driving - 40 PSI
Sand driving - 40 PSI
Removal. Remove wheels by following procedures shown in steps 1 thru 5 of figure 4-24.
Cleaning, Inspection and Repair.
Remove tire from wheel (para. 4-31) before proceeding with cleaning, inspection and repair.
Clean wheel with soap and water, then dry thoroughly.
Inspect wheel carefully for distortion and replace if damaged.
Check condition of paint and repaint if chipped or cracked paint or bare metal is found.
Inspect mounting stud holes for apparent wear due to loose mounting; replace wheel if worn.
Check split retaining ring for wear or distortion and replace if wear or distortion are such as to
prevent ring from holding tire effectively,
Installation. Install wheels by following procedures shown in steps 6 thru 10 of figure 4-24.