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MIL-PRF-62365C(AT)
TABLE IV. Classification of defects.
Method of
inspection
Category
Defect
Major:
101
Dimensions affecting interchangeability not within
SIE 1/
tolerance (see 3.3.8 and 3.3.11).
Direction of rotation marking not as specified
102
Visual
(see 3.3.10).
Weight not as specified (see 3.3.12).
103
SIE
Minor:
Dimensions not affecting interchangeability not
201
SIE
within tolerance (see 3.3.8 and 3.3.11).
202
Improper marking (see 3.3.10 and 3.6).
Visual
203
Improper workmanship (see 3.7).
Visual
Cleanliness (see 3.3.2).
204
SIE
1/ SIE = Standard Inspection Equipment.
4.5.2 Tests. Each hydraulic motor assembly shall be subjected to the tests specified in
table III.
4.5.3 Performance.
4.5.3.1 Starting torque. To determine conformance to 3.4.1, the motor shaft shall be
externally rotated through one revolution at a rate less than one rpm. The differential pressure
across the motor ports shall be maintained at a value not to exceed 2300 psi. The torque
measured at any point in the rotation shall not be less than 30 lb-in.
4.5.3.2 Running torque. To determine conformance to 3.4.2, the torque shall be
measured at the output shaft of the motor, running at a speed of 3000 rpm with a differential
pressure of 2300 psi. The torque shall be not less than 30 lb-in.
4.5.3.3 Friction torque. To determine conformance to 3.4.3, the torque required to
rotate the unit at a speed of 6 rpm shall be measured at the output shaft. The torque required
shall not exceed 2.5 lb-in (0.28 N-m).
4.5.3.4 Holding torque. To determine conformance to 3.4.4, apply an overhauling
torque of 24 lb-in to the motor shaft. Connect the drain port to the inlet port thru a 10 psi check
valve and block the outlet port. Fill all hydraulic lines with hydraulic fluid. The motor shaft shall
not rotate more than 200 revolutions in 10 minutes with a 24 lb-in (2.7 N-m) torque applied.
12

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