MIL-C-62310A(AT)
3.4.3 Doors and covers. All doors and covers furnished shall conform to applicable
drawings. When doors and covers are installed in accordance with the drawings, they shall fit
and be water, dust and snow resistant and function without interference or misalignment.
3.4.3.1 Hatches and vision devices. All hatches and vision devices furnished shall conform
to applicable drawings. Hatches shall have positive locks for open position. Vision device
receptacles incorporated in the vehicle shall accept Government supplied vision devices without
binding or interference, and provide adequate support during all vehicle operating conditions.
All closed hatches and installed vision devices shall restrict entrance of water to a maximum of
10 drops per minute, collectively, into the vehicle.
3.4.3.2 Doors (M106A2 and M125A2). The roof access door center section on M106A2 and
M125A2 vehicles shall open back on right door section, and lock securely and open in
combination with the right door section on top deck and lock securely. The left door section
shall open back on top deck, and lock securely. When open during vehicle operation, access
doors shall remain securely locked in open position.
3.4.3.3 Covered extension lightproofness (M577A2). When installed and attached to the
M577A2 vehicle in accordance with applicable drawings, the lighted interior of the covered
extension shall be invisible at a distance of 125 yards under natural pitch darkness conditions.
All junctions shall be lightproof when operating under field conditions.
3.4.3.3.1 Covered extension wind resistance. The covered extension, when assembled over
the frame assembly and attached to vehicle, shall withstand a steady wind pressure of 40 miles
per hour.
3.4.3.3.2 Covered extension stowed. All covered extension items stowed (combat loaded)
on the vehicle in the spaces provided shall fit properly and not interfere with the operation of
vehicle or components.
3.4.4 Engine. The engine shall conform to MIL-E-62140 and shall operate throughout all
speed ranges without evidence of cooling system, lubricant, or fuel leakage.
3.4.4.1 Engine air induction system. The air induction system, as installed, shall prevent
entrance of foreign matter as specified on applicable drawings.
3.4.5 Exhaust systems. The engine exhaust system, as installed and the personnel heater
exhaust system when installed, shall not permit concentration of toxic fumes in the driver and
crew compartments to exceed 50 ppm for carbon monoxide (CO) or 5 ppm for oxides of nitrogen
(NOx).
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