MEO FUNCTION VI Miscelleneous

Explain the procedure of removal of liner in auxiliary engine.

Auxiliary engine cylinder liner overhaul interval:

Liner inner diameter should be checked after 8000-10000 running hours and after 16000-20000 running hours, it should be taken out, cleaned and checked.

Disassembling preparation:
  1. Make sure the all stand by auxiliary engines are ready
  2. Read the manual and have a tool box meeting with everyone involved in the job. Discuss the complete procedure.
  3. Prepare important tools and spares required for overhauling liner as given in the manual
  4. Prepare risk assessment and make sure all personal safety equipment are used
  5. Go through the previous records/manual for clearance and adjustments
  6. Put the display card “MEN AT WORK”, “DON’T START” at lub oil pump and auxiliary engine breaker.
  7. Close air bottle valve to auxiliary engine and engine start and stop valve
  8. See that the turning bar is not in the flywheel and should be in place
  9. Open the indicator cocks.
  10. Close lube oil, fuel oil, fresh water inlet/outlet valve, drain the cooling water line and remove connections
  11. When drawing out the cylinder liner, cover the crankshaft with a sheet or the like to prevent water and foreign matters from entering the crankcase.

Remove the cylinder liner according the following procedures:

  • Attach the exclusive tools in the ascending order of numerals shown in figure below.(This is for a particular Yanmar Engine)
1 Spacer
2 Liner drawing-out upper implement
3 Bolt
4 Washer
5 Nut
6 Liner drawing-out lower implement
7 Nut
8 Lock nut

head 4

FIG.: Cylinder Liner Drawing Out Procedure

Note: Attach the aforementioned upper implement 2 and the lower implement 6 so that their respective stepped parts face the inner diameter side of the cylinder liner and the lower implement 6 in the direction of the crankshaft.

  • Adjust the length of protrusion from the lower part of the drawing-out bolt 3 to about 60mm, and lock the drawing-out bolt 3 with the lock nut 8 .
  • While supporting the cylinder liner to prevent it from making contact with the cylinder, tighten the nut 5 .
  • Fit the cylinder liner in the stepped part on the lower side of the upper implement 2 , and lock the cylinder liner with the drawing-out tools.
  • Attach a wire rope to the upper implement 2 , and lift the cylinder liner.

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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