MIL-T-62145 Trucks: Elevating Body, Diesel And Gasoline Engine Driven, 21,000 To 39,500 Pounds Gvw, 4X2 And 6X4, CommercialThis specification covers diesel and gasoline engine driven four-wheel, two-rear-wheel drive, and six-wheel, four-rear-wheel drive vehicles having minimum gross vehicle weights GVW of 21,000 to 39,500 pounds, for normal operating conditions. The vehicles are commercial trucks equipped with stake and platform or van bodies, capable of elevating the body and cargo to a specified height for loading and unloading the cargo into and out of aircraft. The vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62145E

4.4.4.2 Wind load test. Wind resistance shall be demonstrated with the payload specified in table II and without payload. With the payload, with the body elevated to its maximum height and with the vehicle positioned whereby the greatest area is parallel to the centerline of the vehicle, the wind load, generated by an artificial means or by an equivalent simulated wind, shall be applied to the vehicle from the sides (see 3.3.3.8). The tires and outriggers shall be observed to insure they remain in contact with the ground.

4.4.4.3 Elevating body speed test. With the vehicle resting on approximately level ground and the payload specified in table II uniformly distributed over the body loadspace, the body shall be elevated to its specified height (see table V) and held for 2 minutes, plus or minus

1/2 minute, and lowered to rest position forty cycles, with a 30-minute interval between each

10 cycles. Each cycle equals one complete elevation and retraction of the body. The test shall verify the operating speed requirements of 3.3.3.5 and the temperature requirements of 3.5.6.5. The test shall be performed in an ambient temperature of 75°F plus or minus 10°F. The test shall be repeated for 5 cycles without load to determine conformance to 3.3.3.5 without load.

* 4.4.4.4 Creep test. With the vehicle resting on approximately level ground, and an evenly distributed full payload (see table II) placed on the body, the body shall be extended to its full height and held for not less than two hours. Vertical settling shall be not more than 1/8 inch in two hours (see 3.3.3.6). Hydraulic oil shall be stabilized at ambient temperature before time measurement starts.

4.4.4.5 Unbalanced load test. With the vehicle resting on level ground, one quarter of the payload specified in table II shall be located in any one corner of the body floor. The hoist shall then raise and lower the body ten times without evidence of binding, deformation or bending of the hoist mechanism. The body with the unbalanced load shall not deflect more than

1-1/2 inches measured from the floor to the top of the subframe.

* 4.4.4.6 Tailgate, type I stake and platform. The tailgate on type I stake and platform vehicles shall be lowered and a 5,000 pound load imposed. The tailgate, hinges, chains, chain supports and, when applicable, hydraulic system, shall be capable of accepting this imposed load, as specified.

4.4.4.7 Platform bumper, type II van. The platform bumper on type II van shall stop the body elevation when the bumper contacts an external object and shall lower the body until contact is broken (see 3.7.11.1).

4.4.4.8 Telescopic ladder. The telescopic ladder, when provided, shall be capable of extending and retracting when the body is being exercised (see 3.5.8).