MIL-T-740 Trucks; 5 Ton, 6X6, Military Design, M39, M39A1, M39A2 And M809 SeriesThis specification covers general and special purpose 5 ton, gasoline, multi-fuel, and diesel engine powered, six-wheel, six-wheel drive, military design truck chassis, trucks, and truck tractors having single front and dual rear wheels.

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MIL-T-740G

4.4.14.22 Trailer rack, ramps and tiedown accessories test. To determine conformance to

3.4.13.1.2, with the winch, load the trailer on the truck using the ramps. Secure the trailer and

the ramps in the loaded position. During the test make 5-U turns to the right and 5-U turns to the

left at a safe speed not less than 5 mph with the steering wheel turned against the stops. Incompatibility between the trailer and ramps loaded on the truck, any obstruction or damage to lights, or permanent shifting of the trailer and racks shall constitute a failure of this test.

4.4.14.23 Body, truck, stake bridge building operational test. To determine conformance to

3.4.14 through 3.4.14.1.4, the complete body and its components, mounted on M139A1,

M139A2, or M812 W/W truck chassis, shall be lubricated and serviced (see table IV). The body shall be subjected to an 8 hour test specified in table XII. During these operations the truck shall be loaded as specified. On conclusion of the test the body shall be free of defects specified herein.

TABLE XII. Operational test (M328A1, M328A2 and M821 W/W.

Course Hours and speed Payload

Hard surface

Cross-country

2 hours at variable speeds up to

45 mph

6 hours at variable speeds up to

maximum

(see 3.4.3) (see 3.4.3)

4.4.14.24 Dump and truck operational test. To determine conformance to 3.4.15, with specified load in dump body, the controlling and operating mechanisms shall be operated and observed for performance requirements.

4.4.14.25 Drop side cargo body operational test. To determine conformance to 3.4.16, the tailgate and locking device shall be operated as specified, the drop sides interchanged from side to side and examined for performance requirements.

4.4.14.26 Air transportability test. To determine conformance to 3.4.17, when required, the vehicle shall be evaluated for air transportability.

4.4.14.27 Radio interference suppression test. To determine conformance to 3.4.18, the vehicle shall be subjected to radio interference suppression test as specified in MIL-STD-462.

4.4.15 Painting, marking and data plates.

4.4.15.1 Painting examination. To determine conformance to 3.5.1, preparation and painting shall be examined during and after application.

4.4.15.2 Marking examination. To determine conformance to 3.5.2, vehicle markings shall be examined.