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Trucks, Lift, Fork, Electric Motor Driven, 2000-3000-4000-6000 Pound Capacity
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MIL-T-52953C
same or parallel position within dimension specified on the applicable
specification sheet, when operated as specified herein.
3.24.4  Speed.  While carrying the rated capacity load on a level surface,
truck shall be capable of attaining speeds specified on the applicable
specification sheet in both the forward and reverse directions.
3.24.5  Slop ascension, first speed, forward direction .  The truck shall be
capable of ascending a 15 percent grade on a dry concrete surface with and
without capacity load.  The truck shall be able to accelerate from dead stop
on this slope when carrying capacity load.
3.24.6  Upright tilt.  When unloaded, truck mast shall have the forward
tilt and rearward tilt specified on the applicable specification sheet.
Positive means shall be furnished to prevent cavitation of the tilt cylinders.
3.24.7  Collapsed mast height .  The collapsed mast height of an unloaded
truck measured from the ground to the top of the uprights in a vertical
position shall not exceed that specified in the applicable specification
sheet.
3.24.8  Maximum fork height .  The maximum fork height of a truck bearing
capacity load with the uprights fully extended, measured from the ground to
the load carrying surface of the forks at the capacity load center, shall be
not less than that specified in the applicable specification sheet.
3.24.9  Free lift height .  Height of the forks without increasing the
specified collapsed mast height shall be not less than that specified in the
applicable specification sheet.
3.24.10  Stability.  The truck shall conform to "forward stacking",
"forward travel", "lateral stacking", and "lateral travel" stability
requirements of ANSI B 56.1.
3.24.11  Endurance/reliability .  The truck(s) shall complete 4000 cycles
over a course as shown in figure 1 in accordance with test method 1.  One
endurance failure or a total of four reliability failures will be cause for
rejection.  Failures are as defined in 4.4.10.
3.24.12  Underclearance.  The truck with capacity load shall have
sufficient underclearance to permit operation from one horizontal plane to
another up or down a 15 percent slope and over the obstacle course described
in test method no. 1.  Minimum underclearance beneath the mast assembly, when
in true vertical position, shall be not less than that specified on the
applicable specification sheet when the truck is loaded.
3.24.13  Drift.  The lift assembly shall be capable of holding the rated
load at maximum height for not less than 2 minutes with not more than 1 inch
of vertical drift and not more than 0.5 degree of rotational drift from the
vertical.  Specified drift rates shall be measured when hydraulic oil
temperature is not less than 120 degrees fahrenheit.
13

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