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Marine Engineering Practice - Cross Head Removal

  • Date Submitted: 03/10/2012 06:10 AM
  • Flesch-Kincaid Score: 62.9 
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Home » Main Engine, Procedure/Maintenance
Procedure for Cross Head Bearing Removal of Marine Engine – MAN B&W S50MC-C
Submitted by Anil.S on August 3, 2011 – 8:39 amNo Comment
It is very important in a large two stroke slow speed engine to transfer the power generated in the combustion chamber to the crankshaft without transmitting transverse forces to the piston and large thrust directly to the crankshaft. Hence an arrangement is provided to compensate this which is known as Crosshead.
The reciprocating action of piston is converted into rotary motion for crankshaft by means of the cross head where the piston rod and connecting rod are attached on both sides.

A routine maintenance has to be performed on crosshead bearing as per maker’s instruction. Following procedure is to be followed when carrying out crosshead bearing removal of a MAN MC-C engine:
1)       Inform company and take permission.
2)       Take immobilization certificate from port.
3)       Read the manual and have a toll box meeting with everyone involved in the job. Discuss the procedure.
4)       Prepare important tools and spares to be used in this operation
5)       A risk assessment of all personnel doing the operation to be prepared and documented
6)       Shut main engine starting air
7)       Engage turning gear to the main engine crankshaft
8)       Open indicator cocks of all cylinders
9)        Stop main engine lube oil pump after cooling down of engine
10)    Open crank case doors of fore and...


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