Onsite Grinding of Yanmar 6N18AL-UV

Product Description

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:

YANMAR 6N18AL-UV Auxiliary Engine Crank pin before grinding

YANMAR 6N18AL-UV Auxiliary Engine Crankpin Having line Marks

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.

Inspection of YANMAR 6N18AL-UV Auxiliary Engine

YANMAR 6N18AL-UV Auxiliary Engine Under Inspection

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.