2 ton, multi-fuel engine driven, six-wheel six-wheel drive, military design truck chassis, trucks, and truck tractors.

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MIL-T-46780D(AT)

30 inches depth for a 15 minute period, without requiring addition of special equipment or adjustments.

3.4.7 Gradeability. The vehicle shall demonstrate gradeability on prepared slopes and grades specified, without stalling slipping, overheating or upsetting.

3.4.7.1 Longitudinal grades. The vehicle shall ascend not less than a 3 percent grade at a minimum speed of 30 mph when loaded with cross-country payload and towed load. Vehicle shall ascend 60 percent grade when loaded with cross-country payload and without towed load. Grades shall have smooth, dry concrete road surface.

3.4.7.2 Side slopes. The vehicle shall negotiate 20 percent side slopes in either direction when loaded with cross-country payload.

3.4.8 Braking ability. The vehicle fully equipped and loaded with highway payload, shall be decelerated, held, and controlled by use of the brakes under the conditions specified for each braking system. Road surface shall be smooth, dry concrete.

3.4.8.1 Service brakes. Application of service brakes shall stop, hold, and control the vehicle when descending 60 percent grades. On relatively level roadway, application of service brakes shall bring the vehicle to a complete stop from a speed of 20 mph within 30 feet, from position at instant of application.

3.4.8.2 Hand (parking) brake. Application of the hand brake shall hold vehicle less a towed load, motionless on a dry concrete, 40 percent grade when headed up or headed down grade with rated cross-country payload (see table XIV).

3.4.9 Cramping angle. The front wheels shall have a full cramping angle of 27 to

28 degrees at the wheel on the inside of the turning circle. Axle stops shall be provided and adjusted to obtain the angle specified. When adjusted axle stops shall be so set that the angle adjustment cannot be readily altered and shall positively limit the cramping angle to the value specified.

3.4.10 Fuel dispensing filter separator system (M49A2C). With vehicle engine operating at governed rpm of 1100 and transmission in second gear, the dispensing system shall dispense fuels other than diesel oil through the filter separator system, at a discharge rate of not less than

42 GPM and not more than 48 GPM of clean fuel at the end of a 35 foot length of 1-1/2 inch discharge hose shall be maintained. When dispensing diesel oil the discharge rate of 42 GPM may be reduced to 25 GPM. The dispensing system shall operate without malfunction or leaks and the dump valve shall function properly.

3.4.10.1 Fuel cleanliness. The filter separator shall remove all undissolved water and shall limit the passage of solid contaminants to not more than 0.5 milligrams per liter of fuel.