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|  MIL-T-11663K
3.4.10 Wheels, rims, tires, and tubes. Unless wide base tires are specified, the vehicle shall be
equipped with single front and dual rear wheels. Rims and tire ratings shall conform to Tire and
Rim Association recommendations for the type and size of tires furnished. Rims and disc wheel
sizes shall be the same for all wheels on each vehicle. Tire size and load range (ply rating) shall be
the same for all tires on each vehicle. When specified (see 6.2), the vehicle shall be equipped with
wide base type tires and wheels for the front and rear axles in lieu of conventional front and dual
rear wheels and tires. Wide base wheels shall be interchangeable without the use of an adapter.
When specified (see 6.2), 10-stud disc type wheels shall be furnished.
3.4.10.1 Tires. Steel belted radial or, when specified (see 6.2), bias ply tires shall be
furnished. Tires shall be tube or tubeless type with highway tread. Tires shall be of a rated
capacity at least equal to the load imposed on each tire, measured at each wheel, at the ground,
with the vehicle loaded as specified in 3.2.5 and 3.2.6. Tires shall conform to Tire and Rim
Association recommendations, or to ZZ-T-381 with a size designation system the same as the
Tire and Rim Association,
3.4.10.2 Inner tubes. When tube type tires are furnished, inner tubes shall be of the heavy
duty type, and shall be of proper size for the tires furnished. Tire flaps shall be provided for tube
type tires in accordance with Tire and Rim Association recommendations.
* 3.4.11 Brakes. The brakes shall conform to Federal Motor Carrier Safety Regulations 393.40
through 393.43 and 393.45 through 393.52. When available as the manufacturer's standard or as
an option, brake linings shall be of nonasbestos material.
* 3.4.11.1 Service brakes. The vehicle shall be equipped with full-air brakes on all wheels. The
braking system, complete with all necessary components, shall include:
(a)
Air compressor, unloader-head type, engine driven and engine lubricated, air or water
cooled, and having a capacity of not less than 7-1/4 cubic feet per minute (cfm)
*
(b)
Air storage reservoir(s), each tank equipped with drain, and with safety and check
valves between compressor and last reservoir tank
(c)
Foot control, suspended or treadle type
(d)
Air control valves
(e)
Air pressure gage, visible to the driver
(f)
Low air pressure warning, visible and audible
(g)
Service brake stop lamp switch
(h)
Automatic moisture ejector
(i)
Automatic slack adjusters.
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