RA POWER SOLUTIONS PVT. LTD.

South City, Gurugram, Haryana

a governor failure on a sulzer main engine sulzer z 40/48 on a cargo ship caused substantial damage to the crankshaft and damaged crankpins.

the crankshaft was successfully repaired by ra power solutions' qualified experts within the manual's tolerance guidelines, and they subsequently reinstalled the crankshaft to the load's maximum rated capacity.

crankshaft repair services are offered globally by ra power solutions, an iso 9001:2015 (quality management system) and iso 14001:2015 (environmental management system) certified recognized organization. within 24 hours of receiving the initial information, we can transport our technicians' team and their tools anywhere in the world.

we have been regularly executing on-site crankshaft repairs and crankshaft grinding in dubai, oman, saudi arabia, qatar, abu dhabi, sharjah, ajman, umm al-quwain, and fujairah, bahrain, kuwait, iraq, antigua and barbuda, belize, dominica, dominican republic, grenada, guyana, haiti, jamaica, saint kitts and nevis, saint lucia, saint vincent and the grenadines, trinidad, and tobago, etc.

Following are the details ofRepair of CrankshaftofYANMAR Diesel Engine Model 6N18AL-DVundertaken by RA Power Solutions for one of the leading shippingcompanybased in India.

YANMAR 6N18L-SV Auxiliary engine on board a vessel met with a serious accident. Three (3) technicians consisting of metal stitching expert and crankshaft grinding were deputed on the vessel at Fujairah Port, Dubai.

The Yanmar Engine details are as following:-

YANMAR 6N18L-SV Auxiliary Engine Accident Details:

1. Connecting Rod bolts of crankpin unit number #02 failed, resulting in the connecting rod hitting the engine block.
2. Engine block window cover sitting area was badly damaged. The casting was broken into pieces.
3. The window cover of the engine block was also broken and the crankpin unit number #02 of the crank shaft was damaged.

Inspection of Crankshaft and Engine Block of YANMAR 6N18L-SV. Damaged crankpin unit number #02 was inspected for the following parameters.

(a) Dimensional Inspection of crankpin unit number #02 showed ovality of 0.16 MM.

(b) Due to hitting of connecting rod, the crankpin developed deep depressions and hitting marks.

(c) Radius fillet profile of both the sides was badly damaged.

(d) Minor hairline cracks were observed on crankpin, which is common, as per our experience after such a serious accident.

(e) Hardness at a few spots was observed on the higher side.

(f) The engine block was badly damaged, as shown in the photographs. The total crack length was measured as 46 Inches.

Action taken for Repair of Crankshaft and Engine Block of YANMAR 6N18L- SV:

i) The crankpin unit number #02 was undersized by 1.20 MM, as per the recommendation of the Yanmar Engine manufacturer. The final size of the crankpin was maintained as 143.80 MM. The crank pin diameter was maintained 1.20 mm undersize.

ii) The damaged engine block was repaired by our technicians by metal lock process as mentioned above, the total length of crack was 46 inches.

iii) Damaged inspection window cover was replaced.

iv) Undersize crankpin bearing of 1.2 MM was supplied by RA Power Solutions Pvt Ltd.

v) Engine was commissioned and performance was observed satisfactorily.

We have been regularly executing on site crankshaft repairs and In Situ Crankshaft Grinding in Dubai, Fujairah, Qatar, Saudi Arabia, Oman, Iraq, Togo, Malta, Freetown, Egypt, Malaysia, Iran, Indonesia, Vietnam, Jordan etc.

Himsen Hyundai 6H17/28 crankshaft has been successfully repaired at MIP Mersin, Turkey. The vessel owned by an Italian company faced a major breakdown in one of their auxiliary engine, Himsen Hyundai 6H17/28. RA Power Solutions was approached and deputed our two technicians along with onsite crankshaft grinding equipment. The vessel was anchored at MIP Mersin, Turkey.

Following are the major Engine and Crankpin details: S. No. Engine and Crankpin Details  

Main Observations of Crankshaft of HIMSEN HYUNDAI 6H 17/28

i) On visual inspection, it was found that it was a case of lubricating oil pump failure, damaging the bearings of all connecting rods.

ii) The bearing material was found embedded on all six (6) crankpins and was carefully removed. After polishing the crankpins, the dimensional inspection was conducted. The taper, ovality ranging from 0.22 MM to 0.86 was observed. CR Pin Hardness Inspection CR Pin of HIMSEN HYUNDAI 6H 17/28 Before Repair.

iii) The hardness was checked and was found within limits, except for a few spots, which were found not harmful to the crankshaft.

iv) The crankpins were subject to a MPI test for crack detection and minor hairline cracks were observed, All other parameters were found within the limit.

Action Taken By RA Power Solutions Technicians For Damaged Crankpins:

i) The grinding of all six (6) crankpins was undertaken by our insitu crankshaft grinding machine.

ii) Three (3) number of crankpins diameter was reduced by 1.00 MM and the final size was maintained as 174.00 MM.

iii) Three (3) number of crankpins diameter was reduced by 1.50 MM and the final size was maintained at 173.50 MM. 

Action Taken By RA Power Solutions Technicians For Damaged Crankpins:

The tolerance of all six (6) number crankpins was maintained with 0.02 MM.

We have been regularly executing on site crankshaft repairs and In Situ crankshaft grinding in Dubai, Fujairah, Qatar, Saudi Arabia, Oman, Iraq, Togo, Malta, Freetown, Egypt, Malaysia, Iran, Indonesia, Vietnam, Jordan, etc.

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

Yanmar S185L crankshaft of the auxiliary engine was reported damaged by a Dubai-based company. The vessel was on its way to Mundra India port.

Ready Availability of Undersize Crank Pin Bearing for Yanmar S185L and other make of engines

Understanding the importance of timely availability of undersize crankpin bearings required after grinding, RA Power Solutions maintains a stock of undersize crankpin Bearings up to 2.0 mm. In most cases, our technicians travel to the site with undersize bearing. This avoids the delay in the commissioning of the engine.

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.

MAN Engine Model no. 5L 16/24 is a very common installation on vessels and the engine is used as Generator. The Crank Pin diameter of MAN Engine Model no. 5L 16/24 is only 130mm and the bearing width is 56 mm.For more information please visit our following link: https://crankshaftgrindingrepair.com/MAN-B&W-Model-5L-16-24.php

Yanmar engine crankshaft repair of all models is now possible in situ. The polishing /grinding can be undertaken without removing the crankshaft from the block.

RA Power Solutions has successfully repaired hundreds of crankshafts of Yanmar engine which have been rejected by the companies because of the nonavailability of the latest technology of equipment.

RA Power Solutions has recently undertaken successfully repair of Allen Engine Model no. PVBCS12 F crankshaft was damaged due to an accident onboard a vessel. The crankshaft is of the Main engine of a leading shipping company based in Banjul Gambia.

RA Power Solutions Pvt. Ltd.was approached by a leading shipping company based in Indonesia regarding failure of crankshaft in their two numbersof AUX Engine MAN6L 16/24.

Repair undertaken by RA Power Solutions

In the case of cylinder liners, the crack was repaired from the inside and from the outer diameter as well  by a metal lock process. We used special alloy locks and keys to repair the crack.

The two cracks in the engine block liner sitting area were repaired by a metal lock. After repairs, the proper grinding and polishing was done on the crack area to maintain the specified tolerance.

The liners were assembled in the presence of our technicians and the engine was put on operation after leak test. The performance of the engine after crack repair of cylinder liners and engine block is observed satisfactory.

We have executed successfully hundreds of jobs of damaged and cracked cylinder liners, pistons, engine blocks, and major components used in heavy equipments.

RA Power Solutions is happy to announce that we are extending crankshaft repair services in Haiti, Dominican Republic, Santo Domingo, Puerto Rico, Jamaica, Cuba, Bahamas, Virgin Island, Bani, Venezuela, and Barahona, and neighboring countries.

RA Power Solutions has forty-three years of experience in extending the repair of crankshaft services up to 700 mm diameter of crankpin and main journal. This part of the world had no facilities for repair of the crankshaft thus causing a lot of inconvenience and financial losses to shipping owners.

We have a local representative to deal with your requirement of repair of major engine components including crankshaft.

Please contact our country representative, Mr. Fabio Donati, Tel: +50946006000 Email Id: fabdon07@gmail.com and Mr. Raj Shahani, Tel: 9810012383 Email Id: rajshahani@rapowersolutions.com

RA Power Solutionshave been contacted by various ship owners and Daihatsu5DC-17installations all over the worldregardingthe problems faced by themin the crankshaft ofDaihatsu 5DC-17

Visit us:http://rapowersolutions.com/BlogDetails.aspx?blogname=Crankshaft-Repair-of-Daihatsu-5DC-17-Save-Crankshaft-from-Rejection

All models of Daihatsu engine crankshaft are machined or polished in situ without removing them from the block. It is possible to undertake the machining of the crankshaft even while sailing of the vessel.

There is no need of holding the vessel in anchorage. The most popular Daihatsu engine models are 5DC-17, 6DLB-19, 5DK-20, 6DK-20, 6DK-28, 8DK-28, 6DL-16, etc.

Onsite crankshaft repair is now possible even for the high RPM engine crankshaft like Daihatsu, Yanmar, MAN B&W, Caterpillar, Pielstick, Cummins, Deutz, Volvo Penta, etc which have small crankpin diameters and bearing lengths.

The crankshaft grinding machine is inserted from the inspection window and grinding is done. The machine is designed to be compact and portable. RA Power Solutions extends onsite grinding up to 700 mm diameter all over the world at the lowest cost. We have been extending services for the last forty-three years.

Crankshaft repair and crankshaft polishing is undertaken by our highly skilled trained and motivated technicians. RA Power Solutions has experience of more than forty years in this field of crankshaft repair on land sites and on board seagoing vessels and off-shore anywhere in the world. We are the most respected company in the region.