crankcase inspection

       List the items to be checked during crankcase inspection of a large Marine Diesel Engine

      Safety Precautions carried Out before Crankcase Inspection:

·         Inform bridge and chief engineer.

·         If in port take immobilization certificate.

·         Get propeller clearance from duty officer.

·         Shut off starting air valve.

·         Put man at work tag

·         Stop lube oil pump.

·         Indicator cocks to be opened.

·         Turning gears to be engaged.

·         Ventilate crankcase door properly.

checks 

• Firstly check oil condition for any smell, discoloration or degradation.
• Check the piston rod surface for scoring marks and roughness.
• Check piston palm bolts and locking device for slackness and fretting.
•      CHECK THE guide shoe and area around it.
•          Check cross head bearing general condition.
•          Evaluate top and bottom end of connecting rod bolt, nut and locking device for       slackness, signs of fretting, etc.
•          Check for slip of web and journal by checking the reference mark.
•          Check crankcase relief door spring tension, wire mesh and & sealing ring.
•          Check the axial movement of bottom end bearing.
•          Check and clear O.M.D sampling pipe.