MIL-DTL-46735C(AT)
4.4 Examination. Each winch shall be examined for compliance with the requirements
specified in 3.3 thru 3.3.3, 3.5 and 3.6. Any redesign or modification of the contractor's standard
product to comply with specified requirements, or any necessary redesign or modification
following failure to meet the specified requirements shall receive particular attention for adequacy and suitability.
This element of inspection shall encompass all visual examinations and dimensional measurements.
Noncompliance with any specified requirements or presence of one or more defects preventing or lessening
maximum efficiency shall constitute cause for rejection.
4.5 Method of inspection.
4.5.1 Materials. Conformance to 3.2 shall be determined by inspection of contractor
records providing proof or certification that materials conform to requirements. Applicable
records shall include drawings, specifications, design data, receiving inspection records,
processing and quality control standards, vendor catalogs and certifications, industry standards,
test reports, and rating data.
4.5.2 Defects. Conformance to 3.3 thru 3.3.3, 3.5 and 3.6, shall be determined by
examination for the defects listed in table III. Examination shall be visual, tactile, and by
measurement with standard inspection equipment.
4.5.3 Performance.
4.5.3.1 Functional reliability test. To determine conformance to 3.4.1, 3.4.2, 3.4.3,
and 3.4.4, the winch being tested shall be operated at speeds and with full load specified on applicable drawings
for specific winch, using first layer on drum. Repeat complete cycles for
20 hours, 10 hours in low gear and 10 hours in high gear. During the test, a brake and overload test shall be
accomplished by raising and lowering a load equal to 110 percent of full load specified on a specific drawing (see
3.3). The winch shall be operated for 5 minutes in low gear and 5 minutes in high gear, using the first layer of
cable on the drum. The winch brakes shall stop and hold load twice during each upward and downward movement
with a 5 foot (ft) interval between stops. All lines, levers and gears shall operate without binding or malfunction.
4.5.3.2 Environmental tests. To determine conformance to 3.4, the winch, serviced with
applicable seasonal lubricant, shall be subjected to a temperature of -65F for a period of 4 hours.
°
The winch using first layer of cable on drum, shall be operated for 1 hour raising and lowering a
full load for the specific winch specified in table I at a temperature of -60F to -65°F. One-half of operation shall
°
be in high gear, one-half hour in low gear. Load shall be stopped twice by winch brakes during each load lowering
operation with a 5 ft interval between stops. The test procedure shall be repeated in temperatures from 120 to
°F
125°F with results recorded.
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