MIL-STD-1365 General Design Criteria For Handling Equipment Associated With Weapons And Related ItemsThis design standard contains the general design criteria and applicable tests for beams, bands, strongbacks, cradles, assembly stands, slings, dollies, bomb loaders, trailers and hoists used as an integral component of an ordnance handling device associated with handling weapons and related items. This standard is not intended to be used directly for acquisition of related equipment, but is to be used as the basis to prepare appropriate development specifications from which the equipment is to be designed and procured.

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MIL-STD-1365C

Unless otherwise specified in the applicable development specification or by the procuring activity (see 6.2), all testing shall be conducted with the rated load. Unless otherwise specified in the applicable development specification or by the procuring activity (see 6.2), all tests shall apply to both powered and manual hoists.

5.6.2 Product examination. Each hoist shall be inspected for strict conformance to the pertinent drawings and specifications with respect to function and performance, especially rated capacity, elevation, extension and rotation requirements.

5.6.3 Functional requirements. During testing, the hoist shall be securely mounted either to a vehicle or a stationary apparatus, so that minimal movement is made to the frame.

5.6.3.1 Design proof load. With the hoist securely mounted, a test load (see table I) shall be suspended by the hoist for 5 minutes in the same manner that the rated load is suspended during normal operation. No part of the hoist shall take a permanent set as a result of the test. After completion of the test, remove the test load and apply the rated load. The hoist shall operate satisfactorily under power for 6 cycles and then manually for 1 cycle, raising

and lowering the rated load the full distance. Upon completion of this test, destroy the cable and replace with a new cable.

5.6.3.2 Operating speed. The rated load shall be raised and lowered through the entire lift distance at an average speed as specified by the development specification. This test shall be conducted in the following sequence without interruption between sequences:

a. Perform 2 cycles manually, if manual operation is required as an alternate. b. Perform 12 cycles under power, when the equipment is powered.

c. Perform 10 cycles manually.

No malfunctioning of the hoist, such as skipping or jumping of the cable from the cable grooves or uncontrolled lowering, shall occur during this test. There shall be no evidence of damage after completion of these tests. If manually operated, the effort to raise or lower the designed load shall not exceed 35 pounds (17½ pounds per handcrank) on a radius of 8 inches.

5.6.3.3 Braking. While operating the hoist with the rated load the driving power shall be stopped. The load shall stop positively and smoothly, without slips or jerks, and be held without lowering. Upon resumption of operation, there shall be no interference in any part of the system, or slipping or jerky action due to a clutch, if any. For powered hoists with manual backup, the brake test shall be accomplished two times while operating the hoist manually and six times while operating the hoist under power. For manual hoists only, the brake test shall be accomplished four times.

5.6.3.4 Cycle test. The hoist shall be operated without failure or adjustment of parts through a total of 500 cycles. The rated load shall be raised and lowered the entire lift distance to constitute a cycle. The 500 cycles shall consist of segments of 20 consecutive cycles with a maximum 10-minute period of down time between segments and repeated. After completion of the 500 cycles, the hoist shall be completely disassembled and inspected to determine whether any wear, fretting, scoring, etc., that would affect the operation of the hoist has occurred.

5.6.3.5 Free-wheeling. If a hoist has a clutch or similar mechanism to allow free wheeling of the cable drum to facilitate cable rigging, a maximum and minimum force to extract the cable shall be MIL-STD-1365 specified by the development specification. This force shall be measured to ensure compliance with the design requirements.

5.6.3.6 Safety overload device. The hoist shall have a mechanism by which overloading of the hoist on attaching structures is prevented. The force at which this device is activated (maximum and minimum) shall be specified by the development specification. The mechanism shall be tested to ensure compliance with the design limits.

5.6.4 Environmental. The hoist shall be subjected to all tests described in 5.3.4.