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|  MIL-P-52405C
3.4.7.5 Motor bearings. The rotor shall be provided with antifriction,
lubricatedfor-life, sealed bearings conforming to FF-B-171. The bearings shall
function on a continuous-duty basis while supporting the maximum combined radial
,
and thrust loads imposed by the rotating elements and hydraulic action of the
pump.
3.4.8 Magnetic starters. When specified. (see 6.2), the motors shall have
magnetic starters attached in waterproof enclosures. The magnetic starters shall
be capable of starting the rotor when under the full load conditions imposed by
the attached pump. The magnetic starters shall be unfused with separate overheat
protectors in each phase. Spare overheat protector and solenoid elements as
required shall be furnished so that the magnetic starter may be adapted to either
50-Hz or 60-Hz electrical supply.
3.4.8.1 Remote starters. When specified (see 6.2), a set of pushbuttons with
pilot lights shall be furnished for mounting at a remote operating station.
3.4.9 Human factors engineering. The pumping unit shall conform to human
factors engneering design criteria as described in MIL-STD-1472. Special
emphasis shall be given to the following: 4.1; 4.2; 4.3; 4.3; 4.4.b, c, f, h, m, and
p; 4.5; 4.6; 4.7; 4.8; 4.9; 4.11; 5.1; 5.2; all of 5.4 except for 5.4.1.1.2,
5.4.1.2.4, 5.4.1.8.5, 5.4.1.8.6, 5.4.2.2.2.6, 5.4.2.2.4, 5.4.2.2.5, 5.4.3.1.2,
5.4.3.1.3, 5.4.3.2.2, 5.4.3.2.3, 5.4.3.2.4, 5.4.3.2.5, 5.4.3.2.6, 5.4.3.2.7,
5.4.3.2.8, 5.4.5, and 5.4.6; 5.5; 5,6; 5.9; and all of 5.13 except for 5.13.2.3,
5.13.2.4, 5.13.2.5, 5.13.4.1, 5.13.4.2, 5.13.4.3, 5.13.7.1.8, 5.13.7.2.2,
5.13.7.4.2, and 5.13.7.5.
3.4.10 Noise limits. The noise produced by the pumping unit shall conform
with MIL-STD-1474 requirements, with the exception of MIL-STD-1474, 5.2, 5.3, and
5.4, when tested in accordance with 4.5.2.3.5. The previsions of MIL-STD-1474,
4.3 and 4.4 shall be provided if and only if MIL-STD-1474, 5.1.1.2 procedures
have been pursued and documented to the satisfaction of the procuring activity
and written permission to exceed the 85 dB(A) limit is obtained from the
procuring activity. Hazard signs shall conform with MIKL-STD-1474, 4.3 except the
sign shall state "HEARING PROTECTION REQUIRED WITHIN (specify) FEET". The sign
shall be readable at the distance indicated on the sign.
3.5 Maintainability.
3.5.1 Ease of maintenance.
All assemblies, parts, and attachments shall be
accessible for maintenance, repair and replacement without the removal of other
major assemblies and installed attachments not normally removed. Drain outlets
shall be located for access ibility and allow for drainage into a suitable
container. Design for maintainability shall be in accordance with 3.4.9.
3.5.2 lubricants. The procedure for the selection of lubricants shall be in
accordance with MIL-STD-838, section 5. Lubricants selected shall be in
accordance with MIL-HDBK-113, chapter 2. When the specification of the lubricant
selected includes a requirement for a Qualified Products List (QPL), the
lubricant supplied shall be from a source that is listed on the applicable QPL.
7
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