Explain the procedure of removal of cylinder head of main engine

Removal of cylinder head:

1. Remove the hydraulic jacks, spacer rings and nuts.
2. Release the pressure.
3. Connect the hydraulic hoses to the jacks and raise the pressure as stated in the manual(1000 bar). Loosen the nuts with a tommy bar
4. Pull down the hydraulic jacks of the tightening tool and screw the jacks on to the stud.
5. Position the cylinder cover tightening tool over the cylinder cover.
6. Place the spacer rings over the cylinder head nut.
7. Hook the engine room crane on to the lifting attachment on the top of exhaust valve.
8. Lift away the cylinder cover completely and land it, on a couple of wooden planks.
9. Remove and discard the sealing ring between cylinder cover and liner