MIL-DTL-13714F
high pressure components, or other inherently hazardous items shall be effectively guarded or
insulated to protect operating and maintenance personnel (see 4.5.2).
3.4 Performance. Trailer shall meet performance requirements of this specification when
fully equipped and loaded with applicable payload.
3.4.1 Environmental operation. The trailer shall operate under extreme conditions of
weather and altitude in ambient air temperatures ranging from -65° to +125°F (-54° to 52°C).
The complete trailer when in storage shall withstand a temperature of -80°F (-62°C), without
deterioration that may cause failure of any component part of the trailer (see 4.4.5).
3.4.2 Payload and speeds. The trailer shall carry the rated payload evenly distributed,
while being towed by suitable prime mover over the terrain and speed conditions listed in table I,
without weaving or swaying from the path of the prime mover (see 4.4.6).
TABLE I. Payload, roads and speeds.
Highway
Cross-country
Payload
Paved
Gravel
Level
Hilly
Model
lb (kg) 1/
mph (km/h) 2/ mph (km/h) mph (km/h) mph (km/h)
M310 7000 (3171)
50 (80)
35 (56)
25 (40)
20 (32)
1/ lb (kg) = pound (lb) (kilograms)
2/ mph (km/h) = miles per hour (kilometers per hour)
3.4.3 Grades and slopes. The trailer shall operate on 20 percent side slopes and
30 percent grades (ascending and descending) with rated payload in table I, without damage to
the trailer or prime mover, and without load shift (see 4.4.7).
3.4.4 Brake holding ability.
3.4.4.1 Service brakes. The service brakes of the vehicle combination, under all
conditions of towing, shall decelerate, stop and hold the vehicle combination (towing vehicle and
trailer) within a braking distance of 30 feet (ft) (9.12 meters (m)) from a speed of 20 miles per
hour (mph) (32 km/h) on dry, smooth relatively level, hard-surfaced roads free of loose material
(see 4.4.8).
3.4.4.2 Parking brake. The parking (hand) brake shall hold the trailer with rated payload
on a dry, hard-surfaced 30 percent grade, when uncoupled from the towing vehicle and while
headed up or down slope (see 4.4.9).
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