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|  MIL-C-62310A(AT)
3.6.1 Environmental conditions. The complete vehicle shall operate in ambient air
temperature of plus 125F to minus 25F and, with special equipment installed, down to minus
60F. The complete vehicle shall withstand storage at minus 80F without deterioration that may
cause failure of any component part of the vehicle.
3.6.2 Cooling systems.
3.6.2.1 Engine cooling. With the vehicle operating in an ambient temperature of 125F, the
engine cooling system shall maintain engine coolant at not more than 230F, measured at a point
in the engine outlet to radiator. Radiator pressure cap shall relieve between 13 and 18 psig.
3.6.2.1.1 Deaeration/clearing capacity. Cooling system shall perform as specified while
ingesting air at rates up to 0.6 cubic feet per minute (cfm). With the system stabilized at an air
injection rate of 0.6 cfm, for 12 minutes minimum, the system shall purge itself of air within
4 minutes after stopping air injection.
3.6.2.1.2 Drawdown capacity. Cooling system shall perform as specified while operating
with a coolant volume loss of up to 11 quarts.
3.6.2.2 Transmission lubricant cooling. With the vehicle operating in an ambient
temperature of 125--F, the transmission lubricant cooling system shall maintain lubricant
temperature at not more than 325--F, measured out of transmission into cooler, except at torque
converter speed ratios less than 4/10.
3.6.2.3 Differential oil cooler. With the vehicle operating in an ambient temperature of
125-- F, the differential lubricant cooler shall maintain lubricant temperature below 300F,
measured out of differential into cooler.
3.6.3 Bilge pumps. The bilge pumps, installed in accordance with applicable drawings, shall
remove water from the vehicle at a minimum rate of 44 gpm each with a discharge head of
4 1/2 feet, and with pump motor operating on 27.5 volts impressed at the motor.
3.6.4 Speeds and vehicle control. The vehicle shall sustain speeds up to 32 mph, and shall
attain a speed of 40 mph after 400 miles of operation, without damage to power plant or
suspension system. With vehicle traveling between 15 mph and maximum speed, drift shall not
exceed 3 feet in 100 feet.
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