MIL-PRF-83817 Truck, Lift, Fork, 4,000 Pound Capacity, Variable Reach, Rough TerrainThis document covers a variable reach, rough terrain forklift truck with a 4,000 pound lift capacity at a reach of 23.5 feet 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 8 feet wide by 20 feet long ISO shipping containers. The forklift will operate on hard paved surfaces, soft soil, mud, snow, and sand, on level and hilly terrain.

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MIL-PRF-83817B

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

hydraulic power, and meeting the requirements of 3.8.19. Additionally, the forklift shall be

capable of side shifting the forks by hydraulic power and meeting the requirements of 3.8.20.

3.3.9.3 Load backrest. An easily removable, capable of being installed or removed by one or

two people without tools within five minutes, metal backrest shall be provided. The backrest

shall have a stowage location on the forklift once removed. The backrest shall be the same width

as the carriage. The top of the backrest shall be 34 to 35 inches above the horizontal load

carrying surfaces of the forks. Two ring type devices to restrain the load shall be located on the

load backrest at 30.0 inches �2.0 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 0.63 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.

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

an hour meter shall be installed in the instrument panel. All instruments, except the hour meter

shall be lighted when the front floodlights (see 3.10.2) are illuminated.

3.3.9.5 Service brakes. Full air, air-over-hydraulic, or hydraulic-over-hydraulic type, foot

controlled, all-wheel, service brakes shall be provided.

3.3.9.6 Parking brake. The parking brake actuation shall be independent from the service brakes.

The control shall be located within reach of the seated operator and in a position to permit easy

and safe movement on and off the vehicle. An indicator light that illuminates when the parking

brake is applied shall be provided.

3.3.9.7 Steering. The forklift shall have power steering. In the event of a power failure the

forklift shall be equipped with an emergency power steering mechanism (mechanical or

electrical) conforming to SAE J1511. This supplement power steering mechanism shall allow

the vehicle to be controlled while moving.

3.3.9.8 Load handling controls. All load motion controls shall be right hand operation and shall

be of the self-centering type, i.e. controls shall return to the neutral position when released.

3.3.9.9 Cab. The forklift shall be equipped with an enclosed cab that shall incorporate the

overhead protection requirements of ANSI/ITSDF B56.6-2005, and roll over protective structure

(ROPS) requirements of ISO 3471. There shall be a door on each side; or one door and one side,

front, or rear window that meets the emergency exit requirements of SAE J185. There shall be at

least two windows, one on each side, which can be opened for ventilation. The doors and

windows shall be capable of securely locking in both the closed and open positions. A minimum

clearance of 39 inches from seat to underside of cab, when measured in accordance with

ANSI/ITSDF B56.6-2005 shall be provided. The cab shall be equipped with an internal rear

view mirror. The cab shall be designed in such a way that removal is not required to meet the

air-transport requirements.