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.
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