Yanmar M200AL-DT Crankshaft Repair | Crankpin Machining of Yanmar Engine Crankshaft | Bearings For Yanmar Engine

We received a call from one of the world’s leading shipping company based in Italy advising regarding failure of the crankshaft of Yanmar M200AL-DT. The vessel was on the way to Lome port in Lome, Togo, West Africa.

THE DETAILS OF CRANKSHAFT ARE AS FOLLOWING:-

CRANKSHAFT DETAILS OF YANMAR M200AL-DT ENGINE:-

Our team of two technicians boarded the vessel at Lome, Togo and observed following:-

• The white metal of the bearing was found in the oil sump of the engine.
• The presence of white metal bearing material in the sump necessitated opening of all 6 connecting rods for inspection of crankpins of the crankshaft.
• The crankpin no.4 was observed badly damaged with deep scoring and bearing marks.
• Remaining crankpins on visual inspection had light bearing marks and rough surface.
• The six nos. crankpins were inspected dimensionally for taper and ovality.

FOLLOWING ARE THE DIMENSIONS OBSERVED OF CRANKPINS:-

ACTION TAKEN BY RA POWER SOLUTIONS FOR SUCCESS FULL REPAIR THE CRANKSHAFT OF  YANMAR  M200AL-DT ENGINE:-

The ovality in case of crank pin no. 4 was observed as 0.36 mm which is considered to be quite  on higher side.

The crank pin no.4 was ground to the second under size of 0.80 mm and the final size was maintained as per the report pasted below:-

				Place of Execution	Lome, Togo, West Africa
Type:	Inline	Bearing Length:	61mm
Standard Dimension:-	152.00mm

STANDARD/SPECIFIED NO.							SIZES IN MM
SIZE OF CR PINS
	A	Aa	C	Cc	B	Bb	Min	MAX	Ovality
CR-1	151.96	151.97	151.96	151.97	151.97	151.97	151.96	152	0.03mm
CR-2	151.96	151.97	151.95	151.96	151.96	151.97	151.95	152	0.05mm
CR-3	151.95	151.98	151.95	151.97	151.95	151.97	151.95	152	0.05mm
CR-4	151.19	151.20	151.18	151.19	151.2	151.20	151.18	151.2	0.02mm
CR-5	151.96	151.97	151.96	151.96	151.95	151.97	151.95	152	0.05mm
CR-6	151.94	151.97	151.95	151.97	151.96	151.98	151.94	152	0.06mm

 

All remaining crank pins i.e. 1, 2, 3, 5 and 6 were polished by the special crankshaft polishing machine and the surface finish was maintained as per the international standards.

In this case, the hardness, MPI for crack detection, deflection was taken before and after repair and was found within acceptable limits.

REPAIR OF CRANKSHAFT OF YANMAR  M200AL-DT IN COVID-19 TIMES:-

RA Power Solutions technicians were able to fly to Togo in a short notice as all our technicians have valid CDC. Our on site crankshaft grinding machine is compact and light-weight and was carried as an accompanied baggage by the technicians. Hence, no time was wasted in booking the machine in cargo, custom clearance etc.

In this difficult time of covid-19, when the air fare and extra weight charges are exorbitantly high with weight restrictions imposed by Airlines our clients save money towards the air freight of the  due to the latest design of our equipment and light weight.

We have the expertise of working on crank pins and main journals having small diameter and bearing length.

In the case of Yanmar M200AL-DT, the crank pin standard diameter is only 152 mm and bearing length is only 61 mm. Most of the companies in the world do not have the necessary equipment to undertake the repair of damage crank pins and main journal having small bearing width and recommend to remove the crankshaft for repairs in the workshop.

Onsite Crankshaft Grinding of Yanmar M200AL-DT  Crankshaft Repair of Yanmar M200AL-DT

Insitu Crankshaft Repair of Yanmar M200AL-DT   On Site Crankshaft Grinding of Yanmar M200AL-DT

We have been regularly executing the repair of crankshafts and Diesel Engines all over the world including   Russia, Germany, United Kingdom, France, Italy, Spain, Ukraine, Poland, Romania, Netherlands, Belgium, Czech Republic , Greece, Portugal, Sweden, Hungary, Belarus, Austria, Serbia, Bulgaria, Denmark, Finland, Norway, Ireland, Slovenia, Estonia, Malta Jordan, Libya, Kuwait, Egypt, Morocco, Yemen, Bahrain, Tunisia, Sudan, Oman, Algeria, Saudi Arabia, Iraq etc.

 

This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions India Pvt. Ltd.).

Mr. Shahani is a highly experienced business leader with rich experience of more than 40 years in the field of Power, Heavy and Shipping industry. He is Technical Adviser to many shipping and heavy industries across the globe.

Mr. Shahani is one of the most enthusiastic professional and he has all the brilliance of an exemplary leader. Mr. Shahani is an extremely effective coach and mentor of teams and is adept at providing leadership in a global, cross-cultural environment.

For more information, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Visit our website: http://turbineshaft.in/