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Lifting mechanism and manipulating head |
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|  MIL-L-85532 (AS)
3. 7.3.5
Steering of the loader shall be accomplished
mechanism. The steering gear ratio shall insure
by a power steering
the loader while traveling at maximum speeds. The
positive control of
shall be capable of turning 30 in either direction
rear wheel steering
fore and aft of the
centerline of the loader (see 4.8.2.9) .
Front wheels. The distance between the front wheels,
3.7.3.6
mounted on the forward side frames, shall be individually, infinitely
adjustable, and hydraulically actuated from 72 to 144 inches (see 4.8.2.10).
Lifting mechanism and manipulating head.
3.7.4
Lifting mechanism. The hydraulic lifting mechanism
3.7.4.1
shall be capable of lifting a 4500 pound weapon, store or any combination
thereof in any given attitude, from two inches above ground to a minimum
of 89 inches or 105 inches above the ground depending on the normal or
inverted position of the forks. The lifting mechanism shall be equipped
with a "fail safe" device to prevent the load from creeping or falling
while in any attitude, with the engine in the off position (see 4.8.2.11).
Lifting rate. The hydraulic lifting mechanism shall
3.7,4. 1.1
have a lifting rate, up or down, loaded or empty, of not less than 30
feet per minute throughout the entire lift range of 2 to 89 inches (see
4.8.2.11).
3.7.4. 1.2
Incremental control. The lifting mechanism shall
provide fully controlled lift that can be controlled in increments of
l/8-inch or less throughout the entire lift cycle (see 4.8.2.11).
Azimuth mechanism. The lifting boom shall be provided
3.7.4. 1.3
with an azimuth mechanism that positions the lifted weapon or store by
horizontally moving the boom 20 degrees to either side of center and
shall be made to hydraulically control this movement in increments of
l/8-inch or less (see 4.8.2.11.1).
3.7.4. 1.4
Overload. The lifting boom shall be capable of
holding a static overload of 13,500 pounds for not less than three
minutes without damage to any of the components to prevent the loader
from performing its operational service life expectancy (see 4,8.2,11.2).
3.7.4, 1.5
Lifting time for auxiliary hand pump system. In
case of a prime power failure the lifting mechanism shall be provided
with an auxiliary system that has a lift time, under load, of not more
than five minutes for the entire lift range of 2 to 89 inches (see
4.8.2.11.3),
Manipulator head. The lifting boom shall be provided
3.7.4.2
with a manipulator head for restraining and positioning the weapon or
store. The head shall be equipped in such a manner as to have five
separate motions (see 4.8.2.12).
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