Onsite grinding of crankshaft of Yanmar 6N18AL-UV Auxiliary Engine was undertaken by RA Power Solutions recently at Singapore Anchorage. A leading Dubai-based Shipping Company requested us to inspect and repair onsite crankshaft of Yanmar 6N18AL-UV. The details are as follows:

Major Details of Yanmar 6N18AL-UV Engine and Crankshaft
S. No.	Crankpin Details
1.	Engine Make	YANMAR
2.	Engine Model	6N18AL-UV
3.	Crankpin Diameter Standard	145.00 MM
4.	Crankpin Bearing Width	64.00 MM
5.	Place of Execution of Grinding of Crankpin	Singapore Anchorage
6.	Name of Shipping Company	Reputed Company from Fujairah, UAE

Yanmar 6N18AL-UV crankshaft has a small diameter of 145.00 MM and a bearing width of only 64.00 MM, which requires a specially designed onsite crankshaft grinding machine. RA Power Solutions as a Manufacturer of onsite crankshaft grinding machines deputed two (2) technicians with the on site crankshaft grinding equipment and measuring instruments to repair the crankshaft.

Following are the Major Observations of the Damaged Crankshaft of Yanmar 6N18AL-UV

1. The crankpin number #02 was badly damaged due to the seizure of the bearing, the ovality more than 0.39 was observed. This crankpin due to seizure also had deep line marks.
2. All other parameters like hardness were observed within limits, and no cracks were found in the MPI test. The remaining Five (5) crankpins were also inspected and ovality up to 0.09 MM was observed.

Action Taken By RA Power Solutions to Repair the Yanmar 6N18AL-UV Crankshaft

1. Crankpin number #02 was ground to the third (3rd) undersize of 143.40 mm, thus reducing the diameter of the crankpin by 1.60 MM.
2. All other crankpins were polished by our specialized onsite crankshaft grinding and polishing equipment to remove the rough surface, line marks, etc.

Supply of Undersize Crankpin Bearings

RA Power Solutions technicians carried with them two (2) pairs each of 1.20 MM, 1.60 MM and 2.00 MM bearings. This helped the ship staff to assemble the engine immediately after grinding, they used 1.60 MM undersize crankpin bearings.

This facilitated them to immediately operate the Auxiliary Engine after crankshaft repair onsite was executed by RA Power Solutions technicians.

Stock of Yanmar 6N18AL-UV Standard and Undersize Crankpin and Main Journal Bearings

RA Power Solutions with 44 years of experience is very well aware of the difficulty faced by clients in getting the undersized crankpin bearings. We maintain the stock of crankpin bearings up to the undersize of 2.80 MM and have saved a number of crankshafts from rejection.

We have a team of trained technicians available 24/7 hrs and can be deputed on short notice. Some of our technicians also have valid US VISA and can fly to South America, Caribbean countries, etc.

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.