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|  MIL-P-18682D(SH)
4.6.7.2.4 The pump shall be carefully observed during each shock blow and
thoroughly examined visually after each blow. After each blow, the unit shall
be operated at as close to maximum rated speed as possible and checked for
abnormal noises and vibrations and proper functioning of controls. Turbine
driven pumps may be air driven. Tightening of bolts during shock tests will not
be permitted. If any bolt loosens during the test, the equipment manufacturer
shall provide a corrective procedure which must be approved by the design review
agency.
4.6.7.2.5 Shock test acceptance criteria is as follows:
(a) There shall be no breakage of parts, including mounting bolts.
(b) There shall be no distortion or derangement of any part which
would render the unit incapable of performing as specified.
(c) The amplitude of vibration after test at maximum rated speed
shall be less than twice the amplitude measured at the same
speed before the test.
(d) Adequate lubrication to all bearings shall be maintained.
(e) Critical dimensions and running clearances have been maintained.
(f) There shall be no significant change in the head-capacity curve.
4.6.7 .2.6 Post shock test procedure. The shock tested unit, if it is to
be supplied under a contract or order, shall be restored to the as-new condition
by replacement of all parts damaged or distorted beyond the as-new design
tolerances. Rolling contact bearings shall be replaced regardless of condition.
The shock tested rolling contact bearings shall be destroyed. The restored unit
shall successfully pass the tests specified in 4.6.1, 4.6.3(a), and 4.6.4, if
applicable. Quality conformance test documentation shall certify that the unit
was subjected to the shock test and subsequently restored, tested, and inspected
in accordance with this specification. A completed parts examination check list
shall be supplied (see 6.2.2) and shall identify the parts which were replaced
(such as the bearings) and shall certify that the unit fully conforms to the
specifications for unrestricted service.
4.6.7.2.7 Unless otherwise specified (see 6.2.1), pump units shall be shock
tested with drivers. Flexible coupled pumps shock tested with one driver will
not be required to be shock tested again when supplied with a different driver of
equal or less weight. Prime movers are subject to shock tests in accordance with
applicable equipment specifications.
4.6.7.3 Inclined operation test. Vertical pumps shall be operated for
not less than 30 minutes inclined at an angle from the normal equal to the
combination of the maximum permanent list and trim as specified (see 6.2.1).
Horizontal pumps shall be tested in accordance with the inclined operation
test specified for the driving unit. Operation in the inclined position shall
be as close to rated speed and capacity as practicable. The performance point
shall be indicated in the test report. The pump shall meet specified performance
requirements (see 3.2) without damage while operating in the inclined position.
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