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MIL-T-62357A
*  3.5.4.5 Spare tire carrier. When specified (see 6.2), a spare tire carrier shall be furnished.
The carrier shall enable the safe removal and installation of the spare tire assembly from and to the
vehicle and carrier without personnel positioning themselves or any part of their body under the
spare tire assembly. Threaded fasteners, when used to secure the spare in the carrier, shall be
constructed of or plated with corrosion-resistant material.
3.5.5 Brakes.
*  3.5.5.1 Service brakes. Unless otherwise specified (see 3.5.5.2), the trailer shall be equipped
with a 12-volt electric brake system wired in accordance with 3.5.6.3. The system shall include a
manual controller kit for mounting on the dash of the towing vehicle, a controller kit for
synchronizing the trailer electric brakes with the brakes of the towing vehicle and an emergency
breakaway kit. Kits shall be complete with all necessary parts (except storage battery for
breakaway kit) and installation instructions. Unless otherwise specified, the synchronizing
controller shall be for use with hydraulic brake equipped towing vehicles. When specified
(see 6.2), the synchronizing controller shall be for use with air brake equipped towing vehicles.
The kits shall be boxed, marked as to contents and securely attached to the trailer for shipment.
The brake linings shall be of nonasbestos material.
3.5.5.2 Air-hydraulic brakes. When specified (see 6.2), the trailer shall be equipped with
air-hydraulic type service brakes in lieu of electric brakes. Hose connections shall be in
accordance with SAE Standards and Recommended Practices. The contractor shall maintain in
his file a specification for adjustment of clearances between the brake lining and the brake drum
for new and already applied brakes. The adjustments for the service brakes shall allow sufficient
clearance between the brake shoe lining and the brake drum to prevent drag when in released
position and to maintain a solid grip without slipping when in applied position and shall be capable
of preventing the wheels from turning with the specified payload.
3.5.5.3 Brake system. The stabilization of the air system at the rated working pressure shall
be accomplished with the hydraulic system free of air and with both air lines connected to a
compressed air source. An air pressure gage shall indicate that when the brakes are released, the
pressure drop shall not exceed 1 psi per minute, nor shall it exceed 2 psi per minute with the
brakes normally applied. In the intervening motion, there shall be no hydraulic fluid leakage or air
leakage. The following equipment shall be furnished as a minimum:
(a) Standard breakaway features.
(b) Air reservoir having not less than 1000 cubic inch capacity
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