RA Power Solutions having experience of more than four decades has
emerged as leaders in providing services for onsite crankshaft grinding, crankshaft repair and crankpin reconditioning in Asia, Middle East, South America, Parts of Europe and many countries all over the world. The technology and process used for crankshaft repair is of latest design which ensures that the quality after the grinding and repair of crankshaft is maintained strictly as per the engine manufacturer’s specifications and tolerances.
The combination of the latest design of onsite crankshaft grinding machine possessed by RA Power solutions and experienced technicianns who have collectively repaired more than 10,000 crankshafts gives the confidence to our clients for successful repairs of crankshaft once the job is entrusted to RA Power solutions.
Following are the main abnormalities observed in the crankshaft which requires Crankshaft repair:
I) Bearing line marks and development of rough surface.
II) Damage of radius fillet, lubricating oil hole due to an accident.
III) Development of taper and ovality beyond the limits specified by the engine manufacturers.
IV) Increase in hardness beyond the permissible limit due to overheating.
V) Cracks observed on crank pins and main journal.
I) Dimensional inspection of crankshaft in detail is undertaken by RA Power technicians
II) Hardness check of damaged CR Pin or main journal of Crankshaft is conducted.
III) Crack detection by MPI, dye penetrant or ultrasonic crack detection is done.
IV) Visual inspection
The inspection report in detail is studied by our senior technicians and the necessary planning for onsite repair is done. The onsite crankshaft grinding and polishing is undertaken by RA Power in the shortest possible time.
We also possess portable onsite crankshaft grinding machines which has minimum vibrations. This facilitates us to undertake crankshaft grinding and crankshaft repair even while the vessel is sailing in high seas.
After crankshaft grinding and Crankshaft repair, the final inspection reports are prepared by our technicians and submitted to clients for their records. RA Power also extends services for engine overhaul and maintenance, metal stitching, rebabbitting of bearing, spares, etc.
The author is Mr. Raj Shahani Managing Director of RA Power Solutions having experience of almost four decades of working on high capacity diesel engines, crankshaft, turbines, and rotary equipments.
For more information regarding onsite crankshaft grinding and polishing services, please email us on email@example.com
RA Power Solutions was informed regarding the failure of three nos Crank pin Bearings of MAN B&W 5L60MC main engine onboard a vessel near South Africa.
RA Power experienced team of technicians boarded the vessel in a short time of 18 hours of receipt of intimation regarding the problem faced by the vessel. Following jobs were executed for overhaul and replacement of crankpin bearings in order to operate the engine satisfactorily after Engine repair and Engine overhaul.
I) Inspection and overhaul of the cylinder covers including the fuel and starting valves located in the covers.
II) The cylinder covers cooling spaces were also inspected, cleaned and fitted back with new O-rings.
III) Dismounting, Inspect and overhaul of the exhaust valves, renewed the seats and grinding the valve spindles.
IV) The cylinder liners were cleaned, calibrated and honed in order to restore the liners running surfaces and remove ovality. This ensured that the piston rings perform better and this will lead to a better overall cylinder condition, compared to if honing had not been done. The cylinder liners cooling spaces were also inspected, cleaned and fitted back with new o-rings.
V) The Crank pin bearing caps were dismounted, both top and bottom bearing shells renewed
VI) The Crankshaft Crankpin diameter was checked for the following parameters:
a) Visual inspection to check the presence of any Bearing Line marks or rough surface.
b) All the Crankpins were calibrated for taper & ovality.
c) Hardness was checked and observed within limits.
d) MPI was done to check the presence of any crack.
VII) Adjustment of the variable injection timing (VIT)
VIII) The bearing clearances were taken using lead wire
IX) Crankshaft alignment measurement was taken with a dial gauge.
Conclusion: After replacement of Bearings & Jobs described above undertaken at the time of Engine overhaul & Bearing replacement the engine was tested on the load & performance was observed satisfactory.
A vessel sailing near Oman reported serious breakdown of auxiliary engine of Yanmar model 6N18AL. RA Power Solutions team which is always ready for emergency response left for Oman and conducted the detailed inspection of the engine. It was observed that crankpin no. 4 bearing seized resulting to the damage of CR pin no. 4. All other crankpins also developed ovality to the extent of maximum 0.20 mm.
After checking the hardness, crack and other parameters of the crankpins the grinding was started. The ship was to sail to the next port and it was decided that grinding of crankshaft is to be executed by RA Power Solutions technicians while the sailing of the vessel. RA Power Solutions having portable latest design of crankshaft grinding machine with almost no vibrations started the grinding of crankshaft while the sailing of the vessel. The 6 crankpins grinding to 0.40 mm undersized was completed in a short time of 60 hours. The repair of crankshaft was successful as the engine was put back in to operation and is performing satisfactory.
RA Power Solutions having 40 years of experience in field of crankshaft grinding has achieved many land marks and have performed more than satisfactory for the clients spread all over the world. The expert team of crankshaft grinding technicians can undertake the grinding of crankshafts up to 700 mm.
All the parameters like taper, ovality, surface finish etc. after crankshaft grinding are maintained strictly as per the manufacturer’s specifications. RA Power Solutions undertakes all the jobs related to repair, maintenance, overhauling of high capacity of diesel engines and diesel generating sets onsite all over the world.
Only company which has undertaken repair of more than 11,000 crankshafts and is highly respected for its commitment
For more information, please email us on firstname.lastname@example.org
A vessel sailing near Oman reported serious breakdown of auxiliary engine of Yanmar model 6N18AL. RA Power Solutions team which is always ready for emergency response left for Oman and conducted the detailed inspection of the engine. It was observed that crankpin no. 4 bearing seized resulting to the damage of CR pin no. 4. … Continue reading “Grinding of Crankshaft in Oman by RA Power Solutions”