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Umbilical Maintenance-continued
Repair

TM-5-4220-226-14P MK12 Surface Supported Diving System (SSDS) (NSN 4220-01-097-5674) Manual
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TM 5-4220-226-14&P NOTE Scheduled coupling pull-out test is not normally required on leader  hoses.    Perform  test  on  leader  hose  only  if  test  a. reveals suspicious conditions. Perform coupling pull-out test three years from manufacture date  and  every  two  years  thereafter  and  at  any  time  the hose is suspect. Grip  on  the  hose  should  be  made  approximately  one  foot back from the fittings with a standard support grip. (a)  Install standard support grip one foot behind fitting. (b)  Fill hose with clean fresh water before installing test tee. (c)  Install hydrostatic pressure source. (d)  Install scale (0-300 LBS). (e)  Install chain hoist for an even pull. (f)  Subject hose to a pressure of 600 psig concurrent with axial tensile load of 250 LBS and hold for one minute. (g)  Release pressure and tension from hose. (h)  Disconnect chain hoist, scale, hydrostatic pressure source, and test tee from hose. (i)  Drain water from hose. (j)  Discard hose and coupling that fail this test. 6-5









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