WHEELS AND TIRES. -726280061

TM 9-2320-364-20-1

1-19. WHEELS AND TIRES.

Figure 1-26. Wheels and Tires

Each truck has eleven wheel/tire assemblies (Figure 1-26); the ten installed on the truck axles plus a spare. The

components of each wheel/tire assembly are the wheel, tire, valve stem, Central Tire Inflation System (CTIS), wheel

valve, bead lock and wheel cover.

a. Wheel. The 20 by 10 inch wheel is manufactured in two pieces. Twelve studs (1) that protrude from the

rear wheel half are used to bolt the two halves together. These studs are also used to mount the CTIS wheel

valve bracket and secure the wheel cover (2).

Tire. The 16.00R20 tires (3) are tubeless.

c. Bead Lock. The bead lock is installed inside the assembled wheel and tire. It assures that the tire stays

pressurized when tire pressure is low. It is manufactured in two halves that are bolted together.

d. CTIS Wheel Valve. The wheel valve assembly allows air flow in and out of the tire during CTIS

inflation/deflation cycles. It is mounted to the wheel and secured by a bracket assembly. The input and output

ports are fitted with two flexible and steel tubes in parallel.

Valve Stem. The valve stem connects inside the wheel and is routed to the CTIS wheel valve.

f. Wheel Cover. The entire wheel end contains a wheel cover to protect the CTIS valve and air lines from

physical damage. This cover must always be in place whenever the truck is in operation. It is secured to the

wheel via four of the wheel studs.