Onsite Crankshaft Repair Archives

Daihatsu 5DK-20 Crankshaft repair | RA Power Solutions forty-three years of experience

Daihatsu 5DK-20 crankshaft has been successfully repaired by RA Power Solutions technicians on board a vessel recently. A leading shipping company based in Greece operating more than fifty container vessels approached RA Power Solutions to repair the crankshaft of Daihatsu 5DK-20 on the vessel.

The main challenge was that the crankpin no. 03 of Daihatsu 5DK-20 met with a serious accident damaging the radius fillet of both sides of the crankpin. They had a stopover of only 18 hrs at Mundra Port India.

In fact, the owners disparately tried to get the crankpin repaired in Dubai and approached leading companies but none of them was able to repair the crankpin with a damaged radius filet.

Major Technical Details Of Daihatsu 5DK-20 Crankshaft

S. NO	Crankshaft Details
1.	Engine Make	Daihatsu
2.	Engine Model	5DK-20
3.	Crankpin Diameter Standard	170 mm
4.	Crankpin Bearing Width	78 mm
5.	Place of execution of crankshaft repair	Mundra Port India

Before grinding and polishing of Daihatsu 5DK-20 crankshaft — **Picture Showing Before Grinding and Polishing of Daihatsu 5DK-20 crankshaft**

**Crankshaft grinding of Daihatsu 5DK-20**

Action taken by RA Power Solutions for successful repair of Daihatsu 5DK-20 Crankpin

Dimensional inspection of the crankpin no. 03 was done by the technicians and an ovality of 0.49 mm with deep bearing marks, rough surface, etc was observed.
The radius fillet of both sides of crankpin no. 03 was damaged badly in fact the original profile of the fillet radius of Daihatsu crankshaft was lost due to an accident.
Hardness and crack detection tests were undertaken and were found within limits.
Deflection was also within the parameters.
Our technicians with the help of specially designed compact dedicated tooling for repair of crankpin having small bearing width used the equipment. They reduced the diameter of the crank pin by 1.0 mm and maintained the final diameter of 169.00 mm. Maintaining the tolerance within 0.02 mm, the preparation & formation of radius fillet on both sides of the crank pin was a challenge which was done by our technicians within 18 hours of boarding the vessel.
In this case of Daihatsu 5DK-20 the crank pin bearing width is only 78 mm and with our specially designed equipment it was possible to undertake the grinding.No other company have the compact tooling to undertake such repairs on site without removing it from the engine block.
The bearing is only 1.0 mm undersize and was supplied by RA Power Solutions. The engine was commissioned during the presence of our technicians on board the vessel.

**Daihatsu 5DK-20 after Grinding & Polishing**

**Crankpin Daihatsu 5DK-20 after Repair**

RA Power Solutions is ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified approved company.

We have been regularly executing onsite 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.

For more details of the Repair of engine and supply of bearings please email us on rajshahani@rapowersolutions.com, info@rapowersolutions.com Call at +91 9582647131, or +91 9810012383.

Guaranteed repair of Daihatsu DC-17 Crankshaft | Save Daihatsu DC-17 Crankshaft from rejection | Forty three year’s experience

Contact RA Power Solutions for undertaking the crankshaft grinding of Daihatsu 5DC-17 and all models without removing the crankshaft from the block.

MAJOR TECHNICAL DETAILS OF DAIHATSU DC-17 :

S. NO	Crankshaft Details
1	Engine Make	Daihatsu
2	Engine Model	6DC-17 Engine
3	Crankpin Diameter Standard	145mm
4	Crankpin Bearing Width	64mm
5	Place of execution of crankshaft repair	Odisha Port India

Crankshaft Grinding of Daihatsu DC-17 Engine

As can be seen from the above the crankshaft of Daihatsu DC 17 crankpin width is only 64 mm and diameter is 145 mm which is considered to be very small. It requires a very compact design of Insitu crankshaft grinding machine which can be inserted from the engine block.

RA Power Solutions is the only company in the world which has the latest technology, Equipment, and process available for crank pin grinding and polishing of Daihatsu DC-17 without removing it from the engine block. The grinding of crankpin can also be done while sailing of the vessel.

Machining of crankshaft of Daihatsu DC-17

Grinding under Process of Daihatsu DC-17

Save Crankshaft of Daihatsu DC-17 contact RA Power Solutions for successful and Guaranteed repair

Since no other crankshaft repair company in the world has equipment, technology, and process available for repair of the crankshaft of Daihatsu DC17, they insist on removing it from the block and sending it to the workshop or rejecting it by giving some excuses.
Contact RA Power Solutions who have more than forty-three years of experience in onsite crankshaft grinding and have successfully repaired more than hundred crankshafts of Daihatsu DC-17 all over the world.
The reference of that client, certificate of satisfactory performance, and inspection reports signed by chief engineers of the vessel can be furnished on request.
Reduce downtime, and save crankshaft by getting it repaired by RA Power Solutions.
Undersize bearings of all sizes of crank pin are available in our stock.

RA Power Solutions is ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified approved company.

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.

Crankpin of Daihatsu DC-17 Engine Crankshaft after Repair

For more details on the Repair of engine please email us at raj.shahani@rapowersolutions.com, info@rapowersolutions.com or Call +91-9582647131,+91 9810012383.

In situ Machining of Sulzer Z 40/48 Crankshaft on vessel | Sulzer crankshaft repair

A Sulzer main engine Sulzer Z 40/48 aboard a container vessel faced serious damage to the crankshaft due to failure of the Governor, this resulted in damage to crankpins.

The major technical details of Sulzer Z 40/48 crankshaft are given below:

S. No.	Crankshaft Details
1.	Engine Make	Sulzer
2.	Engine Model	Z 40/48
3.	Crankpin Diameter Standard	330 mm
4.	Crankpin Bearing Width	132 mm
5.	Place of execution of crankshaft repair	Port of Las Calderas Bani in Dominican Republic

**Damaged crankpin of Sulzer Model Z 40/48**

**Repair of Crankshaft of Sulzer Model Z 40/48**

The inspection of the Sulzer crankshaft was done by our technicians and the following main observations were reported.

On removal of the connecting rod from all the six crankpins the crankpin bearings were observed badly damaged. There were deep scoring marks and localized damage on the crankpin.
The hardness and crack detection was done and they were observed to be within limits.
Deflection readings were within the parameters stipulated in the manual.
The crankpins dimensional were checked and ovality as per following table was observed.

**Sulzer Model Z 40/48 crank pin no 04 before grinding**

**Crankpin no. 05 of Sulzer Z 40/48 before grinding**

**Sulzer Model Z 40/48 crank pin no 06 before grinding**

Action taken by RA Power Solutions for successfully repair of crankshaft Sulzer Z 40/48

The ovality, deep scoring marks and local damage was observed on all crankpins, further the ovality ranging from 0.11 mm to 0.43 mm was observed as per the dimensional chart pasted above.
In this situation client’s management was consulted and a presentation was made on the damage to the crankshaft and the remedial action proposed by RA Power Solutions.
All the crankpins were undersized as per the chart below except crankpin no 01 which was only polished:

The radius fillet of two crankpins which were damaged due to the accident was also repaired.
After repair technicians again checked all the parameters and were found within limits.

Sulzer Model Z 40/48 crankpin repair results

RA Power Solutions experienced technicians repaired the crankshaft successfully within the tolerance limits specified in the manual and then re- install the crankshaft to full rated capacity of the load.

By undertaking the repairs of the crankshaft onsite without removing it from the engine block, clients save the down time and also the cost of removing it from the block and sending it to the workshop.

**Crankpin no. 03 after grinding & polishing on board a vessel**

**Sulzer Z 40/48 Crankpin after successful repair**

**Sulzer engine Z 40/48 Crankpin no. 05 after repair**

RA Power Solutions is ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified approved company and extends crankshaft repair services all over the world. We can move our team of technicians and equipment anywhere in the world within 24 hours of first information.

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.

For more details of the Repair of engine, Engine Sulzer, please email us on raj.shahani@rapowersolutions.com, info@rapowersolutions.com or Call +91 9582647131, +91 9810012383.

Repair of MAN B&W Model 5L 16-24 by Using Onsite Crankshaft Grinding Machine

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. In other words, it is about 2 inches

This makes the onsite crankshaft repair very difficult due to limited space in between the two webs. Most onsite crankshaft repair companies based in Europe don’t have the equipment and the technology to undertake grinding/ repair of crankpin of MAN Engine Model no 5L 16/24. The repair companies always suggest to remove it from the engine block and send it to workshop for crank pin grinding or reject the crankshaft.

We successfully executed the repair of the crankshaft of MAN Engine Model no. 5L 16/24. Details are as mentioned below:

S. NO	Crankshaft Details
1	Engine Make	MAN B&W
2	Engine Model	5L 16/24
3	Crank pin Diameter Standard	130 mm
4	Crankpin Bearing Width	56 mm
5	Place of execution of crankshaft repair	Port of Castellon Spain

Details of Crankshaft repair job executed by RA Power Solutions technicians at a port of Castellon Spain.

The damaged crankpin was checked for taper & ovality and it was observed 0.49 mm.
Deep bearing line marks were observed.
All other parameters like hardness and crack detection by MPI were checked and no abnormality was found.
The crankpin was ground to an undersize of 1.0mm.

Supply of Undersize Bearing for MAN Engine Model No. 5L 16/24

It is obvious that whenever grinding is undertaken there is requirement of undersize bearing. In this case of MAN Engine Model no. 5L 16/24, RA Power Solutions arranged and supplied 1.0 mm undersize crankpin bearing to the client.

We maintain a large stock of standard & undersize bearings of crankpin & main journal of popular make & model of engines like Yanmar, Daihatsu, MAK and MAN B&W, etc.

The Engine was commissioned in presence of our technicians and performance was found to be satisfactory.

**Hardness check of crankpin MAN B&W Model 5L 16/24**

**Engine of CME-MAN B&W 5L 16/24 Crankpin grinding**

**MAN B&W 5L 16/24 Crankpin under grinding progress**

For more details on the crank pin grinding machine please email us at info@rapowersolutions.com, or rajshahani@rapowersolutions.com, Call at +91 9582647131,+91 9810012383.

Crankshaft Journal Machining of YANMAR 6N18AL-DV | YANMAR Engine Repair

We were approached by a company based in Greece reporting the failure of a crankshaft of auxiliary engine on one of their vessels operating in the Gulf.

It was reported that the accident resulted in the failure of the bearing of crankpin no. 1, 3, and 6.

DETAILS OF YANMAR 6N18AL-DV ARE AS FOLLOWING:-

S. NO	Crankshaft Details
1	Engine Make	YANMAR
2	Engine Model	6N18AL-DV
3	Crankpin Diameter Standard	145 mm
4	Crankpin Bearing Width	65 mm
5	Name of Vessel	MV GULF Traders

Our team of two technicians boarded the vessel in short notice and requested the chief engineer to open the connecting rod of all six crankpins.

THE CRANKPINS AFTER CLEANING WERE SUBJECT TO DIMENSIONAL INSPECTION AND FOLLOWING DIMENSIONS WERE OBSERVED:-

STANDARD DIMENSION: 145.00 mm

STANDARD /SPECIFIED NO

SIZE OF CR PINS

	A	Aa	C	Cc	B	Bb	Min	Max	Remarks
CR-1	144.66	144.83	144.77	144.82	144.69	144.82	144.66	144.83	Ovality – 0.17 MM
CR-2	144.64	144.77	144.79	144.81	144.65	144.73	144.64	144.81	Ovality – 0.17 MM
CR-3	144.69	144.76	144.76	144.83	144.64	144.81	144.64	144.83	Ovality – 0.19 MM
CR-4	144.61	144.74	144.74	144.79	144.68	144.75	144.61	144.79	Ovality – 0.18 MM
CR-5	144.66	144.81	144.77	144.84	144.71	144.73	144.66	144.84	Ovality – 0.18 MM
CR-6	144.67	144.85	144.78	144.80	144.72	144.77	144.67	144.85	Ovality – 0.18 MM

On going through the above dimensions, it was noticed all 6 crank pins had ovality between 0.17 mm to 0.18 mm and were considerable down in comparison to standard diameter of 145.00 mm.
The hardness of crank pins was checked with a portable hardness tester and was observed within limits.
The MPI was conducted by our level 2 qualified technician.
Multiple hairline cracks were observed on crank pin no.4 having a length ranging from 6 mm to 25 mm.

REPAIRS UNDERTAKEN BY RA POWER SOLUTIONS:-

Considering the ovality , multiple cracks on crank pin nos 4 and rough surface observed of YANMAR 6N18AL-DV.
All the six crankpins except crankpin no. 4 were undersized to 0.80 mm. The crank pin no. 4 has to be undersized by 1.20 mm due to the presence of cracks.

THE FINAL DIMENSIONS MAINTAINED AFTER GRINDING OF CRANK PINS IS MENTIONED BELOW:-

STANDARD DIMENSION: 145.00 mm

STANDARD /SPECIFIED NO

SIZE OF CR PINS

	A	Aa	C	Cc	B	Bb	Min	Max	Remarks
CR-1	144.19	144.20	144.18	144.18	144.19	144.20	144.18	144.20	Ovality – 0.02 MM
CR-2	144.20	144.19	144.19	144.18	144.20	144.19	144.18	144.20	Ovality – 0.02 MM
CR-3	144.20	144.18	144.19	144.19	144.20	144.18	144.18	144.20	Ovality – 0.02 MM
CR-4	143.80	143.80	143.79	143.78	143.80	143.79	143.78	143.80	Ovality – 0.02 MM
CR-5	144.20	144.20	144.19	144.18	144.20	144.19	144.18	144.20	Ovality – 0.02 MM
CR-6	144.20	144.19	144.18	144.18	144.20	144.20	144.18	144.20	Ovality – 0.02 MM

SUPPLY OF UNDERSIZE BEARINGS OF YANMAR 6N18AL-DV BY RA POWER SOLUTIONS:-

The 0.80 mm and 1.20 mm under-size bearings were supplied by RA Power Solutions in a very short time and engine was put back into operation.
We maintain a large stock of spare parts of YANMAR 6N18AL-DV or arrange through our principals on short notice.

THE MAIN FEATURES OF REPAIR OF CRANKSHAFT OF YANMAR 6N18AL-DV:-

The crankpin having a diameter of 145 mm and a bearing length of only 65 mm was successfully repaired by us because of the fact, we have a dedicated crankshaft grinding machine which can undertake the grinding of crank pin having a small diameters and bearing widths.

Most of the companies based in Europe and other countries do not have the equipment which can on-site grind the crank pin and main journal diameter having a small diameter and bearing width. They advise clients to open the crankshaft from engine and send it to the workshop for repairs.

We extend our services all over the world at a very low price.

**Crankshaft Machining of YANMAR 6N18AL-DV on vessel**

**Onsite Crankshaft Grinding of YANMAR 6N18AL-DV**

**Insitu Crankshaft Pin journal Repair of YANMAR 6N18AL-DV**

**Crankshaft after Grinding and Polishing**

MAK , B&W , Sulzer , Bergen , Detroit Diesel ,Stork Werkspoor , Pielstick , Deutz , Yanmar , MTU , Cummins , Nohab Polar , Caterpillar , Mitsubishi , Yanmar , MAK and many more.

We have been regularly executing the repairs in Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, China, Cyprus, Georgia, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, 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 industries. 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 on crankshaft repair, crankpin repair, and yanmar engine repair contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

Crankshaft Repair | Crankshaft Grinding and Crankshaft Polishing – RA Power Solutions

The concept of onsite repair of crankshaft is getting popular with the introduction of a portable lightweight on-site crankshaft grinding machine. Now it is possible to undertake crankshaft repair, crankshaft grinding and polishing on site without dismantling the crankshaft from the engine.

On-site Crankshaft Repair, Crankshaft Grinding, and Crankshaft Polishing costs low with minimum downtime and inconvenience as it does not require removal of crankshaft from the engine block, packing, and transportation to the designated workshop for repair by grinding or polishing process.

Advantage of trusting RA Power solutions

First company based in Asia having experience of four decades in Crankshaft Repair, Crankshaft Grinding and Crankshaft Polishing.
All repairs of crankshaft and process followed for grinding of crankshaft and polishing of crankshaft are approved by class agencies of repute like DNV, Lloyds and various inspecting organisations spread all over the world.
The repair of crankshaft is executed with a guarantee for the satisfactory performance, the pre and final inspection reports before and after grinding and polishing crankshaft are submitted.
Technicians executing the repair of crankshaft onsite are highly skilled, trained in our factory on a dummy crankshaft in order to understand the techniques for successful repair of the crankshaft. Some of our technicians have experience of more than 45 years.
The onsite inspection and polishing of crankshaft repair is recommended to enhance the life of crankshaft and bearings.
RA power solutions offer and undertake inspection and polishing of crankshaft on board a vessel at a nominal cost.
During our working of four decades on diesel power plant, shipping companies we have undertaken Crankshaft Repair, Crankshaft Grinding and Crankshaft Polishing number exceeding more than 10,000.

Conclusion:

RA power solutions has team of technicians with valid CDC from Panama, Palau, and India and can travel all over the world with short notice.

For more details regarding crankshaft grinding, on site crankshaft repair, onsite crankshaft grinding and polishing please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Repair on Board a Vessel by Experienced Engineers – RA Power Solutions

RA Power Solutions Pvt. Ltd. can easily undertake crankshaft repair on board a vessel while it is sailing by using special equipments.

We can undertake crankshaft repair up to the diameter of 700 mm while the vessel is sailing in high seas in anchorage or at berth. This result to considerable saving for ship repairs as no time is wasted for crankshaft repair as it does not require any anchorage or berth.

RA Power Solutions having 37 years of experience have executed more than 10,000 jobs of repair of crankshaft successfully which is a record.

Damaged Crankpin of MAN Marine Diesel Engine

The crankshafts which have been even rejected by the manufacturers are successfully repaired by us using various process/special equipments which we are learned from our experience. All the repair of crankshaft executed by us is guaranteed for the satisfactory performance. The tolerances as stipulated in the manual are strictly maintained.

Most of our technicians have seaman book and they can sail to any part of the world.

For more details regarding in situ crankshaft grinding, crankshaft repair on board a vessel and onsite crankshaft repair please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Repair in Limited Engine Space – RA Power Solutions

RA Power Solutions Pvt. Ltd. have successfully executed crankshaft repair on board a vessel of Hyundai engine. The crankshaft repair companies based in Norway, Singapore, and UK were invited to execute the grinding operation on crankshaft bearings of which were seized due to lube oil pump failure. These companies were not able to execute the repairs due to non availability of compact portable tool which was required as the space available from the inspection window was less.

Knowing the constraints of space, RA Power Solutions Pvt. Ltd. designed and manufactured a special-purpose crankshaft grinding machine which was inserted from the inspection window, and grinding of 6 nos. pins was successfully executed. The engine is performing satisfactorily.

The repair of crankshaft on site was possible because the crankshaft grinding machine designed by RA Power solutions was compact, lightweight and was manufactured according to the size of the window and space available in the crankcase of the engine. The technicians were able to maintain the tolerance after grinding within 20 microns against the stipulated tolerance of 30 microns in the manufacturers manual.

**Repair of Crankshaft in Limited Space**

We have successfully done more than 10,000 jobs of crankshaft repair all over the world like Qatar, Dubai, Sudan, Indonesia, Singapore, South America, Malaysia, Jordan, Kenya, Maldives, Nigeria, Iran, Iraq, Oman, etc.

For more details on crankshaft repair, crankshaft grinding and polishing machine, diesel engine repair, or onsite crankshaft grinding contact us by email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.