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|  MIL-P-19131(SHIPS)
4.3.10.6 The pump unit shall be considered to have failed to pass the shock
tests in the event of any of the following:
(a) Breakage of any parts, including mounting bolts.
(b) Appreciable distortion or dislocation of any part, such
as shaft, mounting feet, bearings.
(c) A mechanical unbalance of more than two times the
amplitude of unbalance measured prior to tests at
rated speed, or more than that permitted by the
specifications for the driver.
4.3.10.6.1 Pump units which have been subjected to the high-impact shock
test and have failed to conform to the requirements of this specification will not
be acceptable.
4.3. 10.7 Pump units which have been subjected to the high-impact shock test
and have successfully passed this test shall be considered acceptable for such ser-
vice as the bureau or agency concerned may authorize. Such equipment shall be
reconditioned by the manufacturer as follows:
(a) Minor deformations of mounting flanges shall be corrected.
(b) Minor deformations-affecting alignment shall be corrected.
(c) All bearing shall be replaced.
(d) Each part shall be carefully examined by the contractor and
any part which he considers substandard shall be replaced,
Minor deformations shall be defined as those which do not cause unqualified rejec-
tion of the design under high-impact shock test but which are in excess of the design
dimensional tolerances specified on the applicable pump drawings.
4.3. 10.8 Performance acceptance test and shock test of attached pumps,
class N-4 and class O- 3, shall be conducted in conjunction with the tests of the
equipment which they serve.
4.4 Hydrostatic tests. - Each pump casing shall be tested hydrostatically to
one and one-half times the maximum rated discharge pressure, but in no case less
than 50 p.s. L A light grade of mineral oil, not exceeding 200 secon Saybolt uni-
versal (at 130 F.) may be used for hydrostatic tests.
4.5 Inspection procedures. - For Naval purchases, the general inspection
procedures shall be in accordance with General Specifications for Inspection of
Material.
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