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MIL-T-52953-SUP Trucks, Lift, Fork, Electric Motor Driven, 2000-3000-4000-6000 Pound Capacity General Specification for No S/S DocumentThis specification covers the general requirement for battery powered, industrial, depot type forklift trucks.

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MIL-T-52953C

4.4 Test.

4.4.1 Test conditions. Test shall be conducted at the ambient temperature and climatic conditions existing at the place of test. Only that maintenance established by the contractor and submitted as a maintenance schedule prior to commencement of the test shall be performed during the test.

TABLE II. Test schedule.

First

Article

Quality

Conformance

Test

Test paragraph

Requirement paragraph

x x

x x x x x x x

x x

x x x

First article truck inspection. Maximum fork height, collapsed mast height, free lift height. Lifting speed, lowering speed. Right angle turn.

Travel speed. Slope ascension. Tilt.

Stability.

Endurance reliability test. Nuclear-biological-chemical protection.

Slinging and Tiedown.

Noise level test.

Maintenance operations test. Brakes.

Drift

Electromagnetic interface

4.3

4.4.3

4.4.4

4.4.5

4.4.6

4.4.7

4.4.8

4.4.9

4.4.10

4.7

4.4.15

4.4.16

4.4.13

4.4.11

4.4.12

4.4.20

4.4.14

3.1.1, 3.6

3.24.7,3.24.8,

3.24.9

3.24.1, 3.24.2

3.24.3

3.24.4

3.24.5

3.24.6

3.24.10

3.24.11

3.20.3

3.4

3.30

3.8

3.17

3.24.13

3.31

4.4.2 Capacity load. During the test specified herein, a 48-inch cube of the specified capacity load shall be used. Capacity load is defined as the truck capacity required by the applicable specification sheet. The tolerances for weight shall be plus 1 percent and minus 0 percent and for dimensions

shall be plus 1 percent and minus 0 percent.

4.4.3 Maximum fork height, collapsed mast height, free-lift height . With capacity load on forks and mast in true vertical position measure and record free lift height and maximum fork height. Measure and record collapsed mast height with no load on the forks. Nonconformance to the applicable specification sheet shall be cause for rejection.

4.4.4 Lifting speed and lowering speed. Record time in seconds required to raise capacity load from floor to maximum fork height using timing device. Measure and record distance in inches from floor to top surface of forks in fully lowered position. Record the difference between maximum fork height and the height of the forks in the lowered position. Record time in seconds to lower unloaded forks from maximum height to fully lowered position. The raising and lowering shall be performed three times. Noncoformance to 3.24.1 or 3.24.2 shall be cause for rejection.