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|  MIL-T-62097C
carrier without personnel positioning themselves or any part of their body under the spare tire
assembly.
*
3.4.10.4 Spare wheel or rim. When specified (see 6.2), a spare wheel or rim shall be
furnished. When a spare wheel or rim or spare tire assembly is furnished on a vehicle without a
carrier, it shall be stowed securely on the vehicle for shipment. When a spare tire assembly is
specified (see 3.4.10.5), a spare wheel or rim shall be furnished.
3.4.10.5 Spare tire assembly. When specified (see 6.2), a spare tire assembly shall be
furnished. The spare tire assembly shall include an inflated spare tire mounted on the spare
wheel or rim. The spare tire shall be of the same size, tread design and load range (ply rating) as
the tires furnished on the front axle of the vehicle.
*
3.4.10.6 Tire chain clearance. Tire chain clearance in accordance with SAE J683 shall
be provided. Allowance for spring deflection shall be included.
3.4.11 Brakes. Brakes shall conform to Federal Motor Carrier Safety Regulations
393.40 through 393.42 and 393.45 through 393.52. Brake linings shall be nonasbestos material.
3.4.11.1 Power-hydraulic type. The vehicle shall be equipped with power assisted,
hydraulically actuated, four-wheel service brakes.
*
3.4.11.1.1 Split hydraulic brake system. The power-hydraulic brake system shall be so
arranged as to provide separate systems for at least two wheels and so designed and constructed
that rupture or leakage type failure of any single pressure component of the service brake system,
except structural failures of the brake master cylinder body, effectiveness indicator body, or
other housing common to the divided system, will not result in complete loss of function of the
vehicle brakes when force on the brake pedal is continued. Pressure component means any
internal component of the brake master cylinder or master control unit, wheel brake cylinder,
brake line, brake hose, or equivalent, except power assist components.
*
3.4.11.1.2 Indicator light. The split hydraulic brake system shall be equipped with an
electrically operated red light mounted on the instrument panel to indicate system effectiveness.
The light shall have an area of not less than 0.196 square inch. It shall illuminate before or upon
application of the brakes when an actuating pressure component of the system has sustained a
loss of pressure. The indicator light system shall include a means for testing by the vehicle
operator to assure that the light bulb is operable.
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