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|  MIL-P-18472G(SH)
(i)
Split casing, bearing housings, and so forth (except for submarine
service.)
Guards for rotating and moving components.
(j)
Warning plates to prevent casualties to equipment and personnel.
(k)
(l)
Provisions for connecting instruments for performance evaluation.
(m)
Attached instruments for monitoring performance.
Visibility and access to attached instruments.
(n)
(o)
Thoroughness of operating instructions.
Thoroughness of preventive maintenance instructions.
(p)
Explicit assembly and disassembly instructions.
(q)
(r)
Exploded views of critical assemblies.
(s)
Adequate system diagrams.
3.2.1.1 Service life. Each pump shall have a service life of 30 years of
which 40 percent shall be actual operation. There shall be no limit on the
number of starts during the life of the pump. The parts subject to wear,
deterioration, and normally requiring replacement at 3-year intervals during the
service life of the pump (with the exception of packing) shall have a life of
40,000 actual operating hours. The requirement set forth above shall not be
construed or interpreted as a warranty requirement, nor otherwise affect the
manufacturer's warranty.
3.2.2 Shock and vibration . Pumps and drivers, all appurtenances, and
controls shall pass a shock test in accordance with MIL-S-901, grade A, as
specified in 4.6.3.2.
3.2.2.1 Shock mount. Unless otherwise specified (see 6.2), shock mounts
(resilient mounts for shock attenuation) shall not be used. When noise attenua-
tion mounts are specified, the pump shall pass the specified shock test on the
noise attenuation mounts.
3.2.2.2 Mounting bolts. Bolts designed to be stressed in shear shall be
installed in holes with a minimum of clearance. Hole diameters shall be not
more than 1/32 inch larger than the bolts for sizes up to and including 3/4 inch,
and not more than 1/16 inch larger than bolts of greater than 3/4 inch size.
Mounting bolts for fastening the equipment shall conform to grade 2 or better of
MIL-S-1222.
3.2.3 Vibration. Pumps shall not be damaged or caused to malfunction by
either the environmental vibrations or by internally excited vibrations. Units
furnished under this specification shall meet the requirements of MIL-STD-167-1,
type I and II when specified (see 4.6.3.4 and 6.2).
3.2.4 Alignment. The construction of all pumps shall be such that
alignment will not be disturbed or undue stresses set up in any part by normal
vibration or contraction and expansion of piping attached thereto in service.
Alignment between separate components of a unit shall be maintained by means of
keyways, rabbet or tongue and groove joints, or fitted bolts, as approved by
NAVSEA.
In no case shall a piece of equipment be rigidly supported from more
than one plane.
6
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