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First vehicle inspection
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Trucks: Elevating Body, Diesel and Gasoline Engine Driven, 21,000 to 39,500 Pounds GVW, 4x2 and 6x4 Commercial
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Hoist stability



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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 75F plus or minus 10F. 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).
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