MIL-DTL-13714F
3.4.4.3 Automatic brake actuation. The chassis shall be equipped with an automatically
actuated device to apply the chassis brakes upon breakaway from the towing vehicle, and to
maintain application of brakes for not less than 15 minutes (min) (see 4.4.9.1).
3.4.5 Turning and tracking ability. The trailer, when coupled to the prime mover
operating in its minimum turning circle, shall follow without cramping and without damage to the
towed trailer or prime mover, and without interference between the towed trailer and the prime
mover. The trailer shall follow the towing vehicle on level hard-surfaced roads without swaying
from side to side (see 4.4.10).
3.4.6 Landing device. Unless otherwise specified (see 6.2), trailer shall be equipped with
swing-up type landing wheels on legs. The landing device shall raise, support, and hold its
proportion of the fully loaded trailer on a 19 percent grade in any direction, and shall swing up
and down without binding or interference. When locked in the up position, landing device shall
provide ground clearance for cross country operation (see 4.4.11 and 4.5.2).
3.4.7 Fording. The trailer shall ford hard-bottomed, salt or fresh water crossings 35 in. in
depth, and shall withstand such immersions for periods up to 15 min duration without damage to
the trailer or its components (see 4.4.12 and 4.5.2).
3.4.8 Lifting transportability. The trailer shall be capable of being lifted as in transfer
operations of land to aircraft or ship to shore. The vehicle body and all components thereof shall
withstand the induced forces without permanent set or part failure (see 4.4.13 and 4.5.2).
3.4.9 Waterproofness. The trailer and all components shall be waterproofed to prevent
entrance of water due to rain, melting snow, and road splash during inclement weather
(see 4.4.14).
3.5 Reliability. Trailer shall require only scheduled operator and organizational
maintenance during the first 1000 miles (1609 kilometers (km)) of normal operation. Trailer shall
require no replacement of any major component during 3000 miles (4827 km) of operation as
specified in 3.5.1 (see 4.3.2.2).
3.5.1 Operational profile. Test mileage shall consist of 3000 miles (4827 km) of
operation (see 4.3.2.2), apportioned as follows:
a.
Hard-surfaced roads
1200 miles (1930 km)
b.
Gravel and dirt roads
240 miles (386 km)
c.
Level cross-country
1000 miles (1609 km)
d.
Hilly cross-country
500 miles (534 km)
e.
Belgian block
60 miles (96 km)
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