MEO FUNCTION VI Miscelleneous

How will you pressure test the piston of main engine?

Piston is pressure tested to test for any leakage at contact surfaces and also between sealing rings.

  • For pressure testing of piston, it is to be turned 180°e. foot of piston should be at our neck level.
  • Remove lifting bracket from piston rod foot.

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FIG.: Removal of lifting bracket

  • Fill piston and piston rod with lubricating oil i.e, complete line including telescopic pipe and area under piston crown

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FIG.: Filling of lub oil

  • Attach Pressure Testing Tool at the foot or base of the piston.

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FIG.: Pressure testing tool fitted at piston base

  • On the gauge attached to the piston testing tool, you can see the pressure inside the piston
  • Now start supplying air at 7 bar to the connection.
  • Attach air hose to the air connection nozzle on the pressure testing tool
  • Pressure testing tool has connection for air.
  • Pressure test the piston at pressure stated in the manual.
  • When gauge show the stated pressure(around 7 bar), then stop supplying air.
  • Check the contact surfaces of piston and sealing ring at contact surfaces. Wait for at least 30 minutes.
  • If there is no leakage for 30 minutes, then everything seems to be fine.
  • Release the pressure.
  • Remove the pressure testing tool.

About the author

Anand Gautam

Anand Gautam is a marine engineer, Graduated from M.E.R.I. Mumbai. He likes to sail onboard ship and is one who is passionate about his job. He loves to share his knowledge, information, and ideas to everyone in a simplified way just for his satisfaction.

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