MIL-PRF-83812 Forklift, Truck, 10,000 And 13,000 Pound Capacity, Adverse TerrainThis document covers a standard commercial, diesel-engine, four wheel drive, adverse terrain forklift truck, which is air-transportable in C-130, C-17 and C-5 aircraft. The truck will be used primarily to load and unload palletized cargo to and from military aircraft. It will also be used to handle loads of various sizes and weights, up to the rated load. The truck will operate on hard paved surfaces, soft soil, mud, snow, and sand, on level and hilly terrain.

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MIL-PRF-83812D

grease, and other foreign matter. Welds shall be of sufficient size and shape to develop the full

strength of the welded parts. Welds shall transmit stress without cracking or permanent

distortion when the parts connected by the welds are subjected to test, proof, and service

loadings.

3.3.9 Design. The forklift shall be designed for safe operation with the rated load capacity

(see 3.3.9.1) at all lift heights, fork tilt and fork positions that the forklift is capable of achieving.

The forklift shall be designed for a safety factor (based on material yield strength) of at least

three times the test load (see 3.3.9.2).

3.3.9.1 Rated load. The rated load capacity for the Type I shall be 10,000 pounds at a horizontal

and vertical load center of 48 inches. The rated load capacity for the Type II shall be 13,000

pounds at 54 inch horizontal load center, and 48 inch vertical load center.

3.3.9.2 Test load. The test load capacity for the Type I shall be 5,000 pounds at a horizontal and

vertical load center of 48 inches. The test load capacity for the Type II shall be 6,500 pounds at

54 inch horizontal load center, and 48 inch vertical load center.

3.3.9.3 Load center. The horizontal load center is defined as the horizontal distance from the

load carrying surface of the load backrest to the center of gravity of the load. The vertical load

center is the vertical distance from the upper (load carrying) surfaces of the forks to the center of

gravity of the load.

3.3.9.4 Fork spacing and side shift. The forks shall be capable of being adjusted laterally by

hydraulic power, and meeting the requirements of 3.8.15. Rigid frame type forklifts only shall

be capable of side shifting the forks by hydraulic power and meeting the requirements of 3.8.16.

3.3.9.5 Load backrest. A metal backrest shall be provided, either as an integral part of the fork

carriage, or as a removable part thereof. The top of the backrest shall be 44 to 56 inches above

the horizontal load carrying surfaces of the forks. The lowest portion of the backrest shall be

from 1.0 to 10.0 inches above the top surfaces of the forks. Two ring type devices to restrain the

load shall be located on the load backrest at 30.0 inches �4.0 inches above the load carrying

surfaces of the forks. The devices shall have a minimum inside diameter of 2.0 inches, and made

of a material not more than 0.75 inches thick. The devices shall have a safety factor of at least 3

when a forward horizontal load, equal to the rated load, is equally applied to both devices.

Location of the devices shall not interfere with positioning the load against the backrest.

3.3.9.6 Fork back-guard. A removable fork back-guard shall be installed above the load backrest

(see 3.3.9.5) to prevent small containers from falling rearward off the forks. The guard shall not

obstruct operator view. Its height shall be such that the total height of the load backrest and the

fork back-guard shall be 80.0 to 82.0 inches when measured from the ground.

3.3.9.7 Instruments. In addition to the instruments supplied on the standard commercial forklift,

an hour meter shall be installed in the instrument panel. When specified (see 6.2), the forklift

shall be equipped with an inclinometer. All instruments, except the hour meter shall be lighted

when the front floodlights (see 3.10.2) are illuminated.