We have onsite crankshaft grinding machines that can even undertake the grinding of small diameters and can easily be assembled on the bearing width which is as small as 40 mm.

The Repair of the Yanmar M200AL-DT Engine of Crankshaft

We are giving below a drawing illustrating the main dimensions of the crankpin of the Yanmar M200AL-DT engine crankshaft

This crankshaft has a diameter of 152 mm and a bearing length of only 69 mm. Such types of jobs and jobs with even smaller bearing widths are executed by us all over the world. We can share the pre and final inspection reports of crankshafts after repairs are executed by RA Power.

Availability of Standard Undersize Bearings of Yanmar M200AL-DL

Understanding the importance of ready availability of bearing and spare parts of auxiliary and main engines, we maintain a large stock of spare parts. For your requirement of the standard, undersize and special size of bearing and spares, you may get in touch with us.

We have been executing the repairs in Laos, Lebanon, Malaysia, Maldives, Mongolia, Nepal, North Korea, Oman, Philippines, Qatar, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Syria, United Arab Emirates, Yemen, etc.

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

He 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 a Technical Adviser to many shipping and heavy industries across the globe.

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

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

The post On Site Repair of Crankshaft of Yanmar M200AL-DT Engine appeared first on Crankshaft Grinding Repair.

RA Power Solutions with experience of more than four decades in the repair of crankshafts of high-capacity engines has the advantage of designing and manufacturing the onsite crankshaft grinding equipment. We manufacture the onsite crankshaft grinding machine diameter ranging from 35 mm to 700 mm whereas most of the crankshaft grinding companies based in Europe, Singapore, UK do not have the equipment which is designed to undertake the grinding and polishing of crankpin and the main journal having a small diameter and bearing length.

We were approached by one of the leading shipping companies based in Europe advising about the damage of the crankshaft due to the failure of the lubricating oil pump of Daihatsu 5DC-17.Engine.

The details of the engine, crankpin diameter, and bearing width are given below

RA Power Solutions technicians having valid Indian seaman books boarded the vessel at Hamburg port.

Following were the main observations of the crankpin of Daihatsu 5DC-17 

• No inspection can be carried out as the bearing metal was stuck on the crankpins.
• The bearing metal was removed from all the crankpins by polishing them with the fine grinding media which is normally carried by our technicians.
• All the crankpin’s hardness was checked and was observed within limits. No crack was observed during the MPI inspection by high-intensity ultra-violet torch.
• The ovality and damage except for crank pin no. 3 was observed up to 0.6 mm and for crankpin no. 3 it was 1.26 mm.
• On going through the above readings and the manufacturer’s manual since the crankpin no. 3 was damaged beyond the last limit of 1.20 mm. The crankshaft was rejected.
• In this time of recession which shipping industries are going through, the owners requested RA Power Solutions to undertake the refurbishment of the crankshaft and save the crankshaft from rejection as they cannot afford to buy a new crankshaft costing in the range of 40,000 to 45,000 US dollar.

Action taken by RA Power Solutions to save the crankshaft of Daihatsu 5DC-17

• Since all other important parameters like hardness, and no traceability of crack, RA Power Solutions repaired the crankshaft by maintaining the following dimensions of the crankpin.
• All the crankpins except crankpin no. 3 were undersized by 0.8 mm.
• Crankpin no. 3 having the ovality and damage to the extent of 1.26 mm was reduced to 1.60 mm under the deviation.
• All the crankpins were polished by the special polishing media and readings were recorded.

Supply of undersize bearings for Daihatsu 5 DC -17

RA Power Solutions Pvt. Ltd. arranged the undersize bearings of 0.8 mm and bearings of 1.6 mm undersize. With these bearings supplied by RA Power Solutions, the engine was assembled and load trials were taken. This job was executed in November 2019 and the engine is performing satisfactorily.

Don’t reject the crankshaft, contact RA Power Solutions for advice.

• We appeal to the engineers and owners of shipping companies having industries and power plants not to reject the crankshaft.
• RA Power Solutions with experience of four decades has the technology and equipment to save the crankshaft from rejection which is even discarded by the engine manufacturer. Use our experience and equipment to save the crankshaft.
• We stand guarantee for all the repairs executed by us.
• The availability of undersized bearings or special-size bearings which are not available from the engine manufacturer is supplied by us to put back the engine into operation after refurbishing the crankshaft.

Conclusion:

In the case of the crankshaft of Daihatsu 5DC-17, the crankpin diameter is only 145 mm and the bearing width is 76 mm. Most of the crankshaft repair companies do not have the necessary tooling to repair of crankshaft of Daihatsu with a small diameter and bearings width. Hence, they recommend taking it to the workshop or replacing it with a new one. Don’t get carried away and contact RA Power Solutions having successfully executed the repair of more than 10,000 crankshafts all over the world.

For more information regarding the repair of the crankshaft of Daihatsu, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

The post Grinding of Crankshaft | Repair of Crankshaft of Daihatsu 5DC-17 appeared first on Crankshaft Grinding Repair.

Don’t get repairs done from inexperienced companies:

This is important as we have observed that shipping companies get in touch with the general workshops that have no experience, expertise, or dedicated equipment for crankshaft repairs. This results in substandard repairs and rejection of the crankshaft as the tolerances specified by the manufacturers are not maintained.

Secondly, we have also noticed that in certain cases to immediately put the engine into operation, the hand polishing is done by rope or any other polishing media. We have experienced that by no way the taper and ovality can be minimized or controlled by hand polishing. The hand polishing of the crankpin and journal of the crankshaft only improves the surface finish which is of no use in case taper and ovality in the crankpin/main journal diameter is present.

Making Informed Decisions About Crankshafts Repair

The managers and the marine engineers should keep in mind not only the exorbitant price of the crankshaft but also its availability and the efforts required to connect it to the vessel. At RA Power Solutions, we consider a crankshaft to be a piece of art having the closest possible tolerances and requirement of high surface finish, we have with our experience learned to investigate in-depth the problem in the crankshaft and prepare the plan for crankshaft grinding repair.

We have saved thousands of crankshafts from rejection which were spoiled because of the wrong procedure of crankshaft repair followed by inexperienced and small repair companies. The most modern onsite grinding equipment available with us is up to 700 mm in diameter. With a combination of experienced technicians and onsite crankshaft grinding equipment, we ensure that crankshaft repair is done strictly as per the manufacturer’s specifications and international standards.

In this time of recession, the cost of crankshaft reconditioning is of great importance. We are considered to be the lowest-priced company in the world giving tough competition to the crankshaft repair companies based in Europe, Singapore, and the UK, who till now enjoyed the monopoly and charged exorbitant amounts from the ship owners.

We are also the manufacturer of onsite portable grinding machines. The machines are manufactured based on our experience in this field and the inputs given by our technicians from time to time. More than 70 onsite crankshaft grinding machines have been sold all over the world. We also extend training to the clients, and technicians to ensure that they can execute the crankshaft reconditioning successfully.

Need more information on crankshaft repair and crankshaft reconditioning, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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