Repair of Crankshaft of MAN B&W Engine 5L16/24

RA Power Solutions was intimated by a shipping company based in Dubai regarding problem faced by them in the crankshaft of MAN B&W 5L16/24. Our two technicians with onsite crankshaft grinding machine and necessary measuring instruments were sent on board the vessel at Kandla Port, India.

Following are the details of MAN B&W 5L16/24:

S. No.	Crankpin Details
1.	Engine Make	MAN B&W
2.	Engine Model	5L 16/24
3.	Crankpin Diameter Standard	130.00 MM
4.	Crankpin Bearing Width	56.00 MM
5.	Place of Execution of Grinding of Crankpin	Kandla Port, India
6.	Name of Shipping Company	Reputed Company from Dubai, UAE

 

CR Pin of MAN B&W 5L 16/24 Before Grinding	MAN B&W 5L16/24 Engine CR Pin Having Dent Marks and Line Marks

Inspection and Repair Procedure of Crankshaft of MAN B&W Engine 5L16/24

 

MAN B&W 5L16/24 Crankshaft During MPI Inspection	MPI Test of Crankshaft of MAN B&W 5L16/24 Engine MPI Test of Crankshaft of MAN B&W 5L16/24 Engine

i) The complete inspection of crankshaft, as per the protocol was done, which includes dimensional inspection for taper & ovality, hardness test, MPI for crack detection and visual inspection.

All other parameters were observed within limits, except excessive ovality was observed in case of all crankpins in the range of 0.10 MM to 0.40 MM.

This is considered to be very much on the higher side, as the tolerance for the crankpin diameter 130.00 MM is only 0.03 MM, as per the manual.

Hardness Test of Crank Pin MAN B&W 5L16/24 Engine	Crankshaft MAN B&W 5L16/24 Engine Under Repair

ii) The ovality report in brief of crankpin is pasted below

 

Ovality of All Crankpins		Remarks
CR PIN #01	0.38 MM
CR PIN #02	0.10 MM	This Pin is already down by 1.5 MM
CR PIN #03	0.40 MM
CR PIN #04	0.25 MM
CR PIN #05	0.10 MM

 

iii) All the crankpins were ground according to the extent of ovality.

iv) The bearings of undersize was supplied by RA Power Solutions.

v) The Engine was commissioning in presence of our technicians and performance was found satisfactory.

 

Crankshaft After Polishing of MAN B&W 5L16/24 Engine	Crankpin of MAN B&W 5L16/24 Engine After polishing

For more information regarding crankshaft grinding services, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.