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

3.3.3 Subframe, hoist, and body performance.

3.3.3.1 Rated lifting capacity. The rated lifting capacity of the hoist shall be not less than the sum of the weight of the body plus one and one half times the payload specified in table II.

3.3.3.2 Stability. The body shall be stable and rigid throughout the entire elevation and retraction of the hoist mechanism, both unloaded and loaded with the test load specified in table V. In the fully elevated position, with the test load, the body floor shall not deflect more than 1-1/2 inches, measured from the floor to the top of the subframe. The vehicle in any elevated position with the test load specified in table V, shall show no evidence of any tire or outrigger departing from the ground.

TABLE V. Height and test load.

Type Class

GVW (pounds)

Height (inches)

Test Load (pounds)

I A I B

I C I D

I E II A

II B

21,000

28,000

34,000

39,500

21,000

28,000

156

178

222

156

198

156

178

12,000

20,000

24,000

28,000

30,900

12,000

20,000

3.3.3.3 Height. The hoist shall be capable of raising the body with the test load specified in table V from rest position to the minimum height specified in table V. The height shall be measured from the ground to the body floor.

3.3.3.4 Manual locking device. A manual locking device shall be provided to positively retain the body and hoist at a raised height of not less than 96 inches measured from ground level to the body floor.

3.3.3.5 Operating speeds. The hoist and the body shall be capable of elevating and retracting both with the specified payload (see table II) and without payload at a rate of not less than 15 feet per minute (fpm) (10 fpm when retracting without payload), and not more than

20 fpm, with the vehicle engine at idle speed, from the time the load is first imposed on the

hydraulic system. The hydraulic fluid shall be stabilized at ambient air temperature prior to the performance of the test.

* 3.3.3.6 Position stability. When the vehicle is on level ground, the hoist hydraulic system shall hold the body loaded with the payload specified in table II, in any elevated position with not more than a 1/8-inch vertical settling in 2 hours. The hydraulic fluid shall be stabilized at ambient air temperature prior to the performance of the test.