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MIL-P-17840C(SH)
(d) Each part shall be carefully examined by the manufacturer and any
part which he considers substandard shall be replaced.
4.6.6.7.1 Minor deformations shall be defined as those which do not cause
rejection of the design under shock test but which are in excess of the design
dimensional tolerances specified on the applicable pump drawings.
4.6.6.8 Reinspection. After shock testing, tests shall be performed
verifying performance characteristics and pump integrity.
4.6.7 Vibration test. When specified (see 6.2.1), pumps shall he tested
in accordance with MIL-STD-167-1, type II.
4.6.8 Endurance test. The pump furnished for initial qualification shall
be operated for a period of not less than 500 hours of actual running time with
a minimum of 100 starts to ascertain reliability of performance and operation.
4.6.8.1 Prior to commencement of the endurance test and immediately after
completion of the endurance test, the pump shall be disassembled to the extent
necessary and the critical dimensions and running clearance of parts subject to
wear, erosion, and derangement shall be measured, calculated, and recorded.
Components such as pump impellers and casings subject to erosion, corrosion,
cavitation, and wear, the effects of which are not subject to routine measur-
ement, shall be listed in the inspection record and after completion of the
test, the condition of each component determined and recorded.
4.6.8.2 During the initial and final hours of the endurance test run, the
capacity test in accordance with 4.6.4.5 shall be performed to determine the
changes in the pump's performance characteristics
4.6.8.3 The endurance test shall not be continuous but shall be inter-
rupted by at least three rest periods of approximately 8 hours each.  The
number of starts specified in 4.6.8 at full line voltage shall be performed
during the course of the test.  During an early part of the endurance test the
pump shall be operated continuously for 24 hours at a capacity as near free
delivery as possible at maximum rated speed and normal specified temperature,
submergence and suction conditions.  During the latter part of the endurance
test the pump shall be operated as near shut-off as possible for 12 hours con-
tinuously.  The remainder of the endurance test shall be run at maximum rated
speed and within plus 20F, minus OF of maximum specified liquid temperature.
The pump shall be operated at one third, two thirds, and rated capacity in
approximately equal time intervals.  Operations shall be at minimum specified
net positive suction head available, or maximum specified suction lift or
vacuum, as applicable.
4.6.8.4 The pump shall be monitored during the endurance test to accurately
record the conditions of operation, speed at which operated, and the general
performance observed.  Data shall be collected and the pump examined at least
twice per day of operation.  For each periodic examination, in addition to all
measured data, the record shall indicate the following:
(a)  The pump seal leakage rate.
(b) The smoothness of operation (normal-abnormal).
(c)  Other abnormal findings.
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