MIL-DTL-62073H(AT)
shall operate on both 12 V DC and 24 V DC. Use of a voltage converter box to meet the 24 V
DC operation requirement is acceptable. The ABS Electronic Control Unit (ECU) shall include
wiring provisions to transmit the trailer (cable, SAE J2394) ABS malfunction signal to the prime
mover cab. ABS systems that are used on Power Line Carrier (PLC) communication
technology to transmit ABS malfunction shall be provided. A diagnostic warning blink light
shall be mounted on an angle at the left side front of the trailer and shall be in view of truck
operator. The ABS diagnostic box shall be water proof to road splash/spray and shall be
located above fording level with easy access for maintenance (see 4.6.3.1.6).
3.5.7.3 Landing device. When specified (see 6.2), except for the M979, M1061A1,
and M1073, the trailer shall be equipped with a swing-up type, vertically adjustable landing
device. The landing device shall support the trailer under any load specified herein on a 20%
grade in any direction, shall lift the lunette to a height required for coupling to the prime mover,
and shall withstand strains imposed during coupling or uncoupling, without impairing operation
of the trailer or towing vehicle. In the stowed position the device shall be horizontal and clear
the ground during cross-country operation (see 4.6.2.1 and 4.6.3.1.7).
3.5.7.4 Leveling jacks. Except for the M796A1, the manually operated leveling jacks
shall raise and support the fully loaded trailer and shall adjust to permit placing the jack bases on
the ground and leveling the trailer on an off-road site (see 4.6.2.1 and 4.6.3.1.8).
3.5.7.5 Trailer bolster. Overall travel of the reach tube shall be 4 ft ± 2 inch (in.)
(1.2m ± 5.1cm) adjustable in increments of 12 to 12.5 in. (30.5 to 31.8 cm). The bolster
locking stanchion shall be removable and stowed within the trailer when not in use. Removable
rear ramps shall be stowed within the trailer frame when not in use. Removable rear ramps
shall be provided for loading and unloading of pontoons, boats, treadways, etc. When not in
use, the rear ramps shall store within the framework of the trailer. The retractable landing leg
shall rotate upward into the traveling position by removing a ball-lock type pull pin holding the
retractable landing leg in operating position (see 4.6.3.1.9).
3.5.7.6 Turning ability. When coupled to the prime mover operating in its minimum
turning circle, the trailer 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 (see
4.6.3.1.10).
3.6 Interface requirements. Completed trailers shall conform to this specification and
interface with the appropriate prime movers (see 4.7 and table I). The trailer shall meet the
NATO requirements of standardization of voltage STANAG 2601, braking and brake
interoperability between tractor and trailer STANAG 2604, electrical connections STANAG
4007, blackout lighting systems STANAG 4381, and trailer road/terrain movements AMovP-01.
3.6.1 Servicing and adjusting. Prior to acceptance of the trailer by the Government,
the contractor shall adjust and service each trailer for immediate operational use, including at
least the following: Adjust braking system, check electrical system, inflate all tires, and
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