Complete Overhaul of YANMAR 6T220-ET main Engine
I. Overhaul of 6 nos cylinder head, replacement of valve seats and valve guides. Replacement of all valve stem guide O-ring seals. Checked cylinder heads warpage and pressure testing of all heads at 5 bar.
II. Overhaul of jacket water, lubricating oil cooler and charged air coolers.
III. Dismount and overhaul of VTR 230 turbocharger, renewed the oil slinger, nozzle assembly and both compressor and turbine side bearings.
IV. Dismount and overhaul of all the air starting valves, relief valves , the piston rings and seals were changed
V. Withdraw all the pistons, took piston clearances and check and cleaned piston ring landing and renewal of piston rings gudgeon pins and big end bearings.
VI. De-glaze the cylinder liners.
VII. Took Crank web deflection measurements prior and after renewal of main bearings
X. Dismount and overhaul the fuel pumps and replacement of delivery valves, plunger and barrels .
XI. Setting of valves tappet clearances.
XII. Overhauled both emergency and attached lubricating oil pumps.
XIII. Dismount and overhaul of both sea water and jacket water pumps, replaced the mechanical seals.