Crankshaft Repair of HIMSEN HYUNDAI 6H 17/28 | Worldwide

The crankshaft of Himsen Hyundai 6H17/28 engine was successfully repaired at MIP Mersin, Turkey. The engine, owned by an Italian company, suffered a severe breakdown due to a failure in one of its auxiliary engines.
RA Power Solutions was contacted and promptly dispatched two experienced technicians along with onsite crankshaft grinding equipment. The vessel was anchored at MIP Mersin, Turkey, where the repair was carried out.

**CR Pin of HIMSEN HYUNDAI 6H 17/28 Before Repair**

Following are the major Engine and Crankpin details:

S. No.	Engine and Crankpin Details
1.	Engine Make	HIMSEN HYUNDAI
2.	Engine Model	6H 17/28
3.	Crankpin Diameter Standard	175.00MM
4.	Crankpin Bearing Width	60.00 MM
5.	Place of Execution of Grinding of Crankpin	MIP Mersin, Turkey
6.	Name of Shipping Company	Reputed Company from Italy

Key Observations of the Crankshaft:

Visual Inspection Findings:

1. The breakdown was caused by a lubricating oil pump failure, leading to damage to all connecting rod bearings.

2. Bearing material was embedded on all six crankpins and was carefully removed.

3. After polishing, a dimensional inspection showed taper and ovality ranging from 0.22 MM to 0.86 MM.

The Dimensional Inspection Report of Six (6) Number Crankpins of HIMSEN HYUNDAI 6H 17/28:

SIZE OF CR PINS BEFORE REPAIR
	A	Aa	C	Cc	B	Bb	Min	STD	Ovality
CR-1	174.74	174.85	174.62	174.73	174.66	174.88	174.62	175.00	0.38 MM
CR-2	174.83	174.92	174.80	174.78	174.83	174.93	174.78	175.00	0.22 MM
CR-3	174.70	174.90	174.55	174.69	174.48	174.54	174.48	175.00	0.52 MM
CR-4	174.78	174.88	174.79	174.72	174.79	174.92	174.72	175.00	0.28 MM
CR-5	174.78	174.88	174.76	174.92	174.72	174.78	174.72	175.00	0.28 MM
CR-6	174.22	174.80	174.14	174.78	174.37	174.85	174.14	175.00	0.86 MM

4. Hardness testing revealed acceptable levels, with minor exceptions in a few spots, which were determined not to be harmful.

5. MPI testing for cracks showed minor hairline cracks, but all other parameters were within acceptable limits.

Actions Taken by RA Power Solutions Technicians:

1. The grinding of all six (6) crankpins was undertaken by our insitu crankshaft grinding machine.
2. Three (3) number of crankpins diameter was reduced by 1.00 MM and the final size was maintained as 174.00 MM.
3. Three (3) number of crankpins diameter was reduced by 1.50 MM and the final size was maintained at 173.50 MM.

Final Report After Grinding is Pasted Below:

SIZE OF CR PINS AFTER REPAIR
	A	Aa	C	Cc	B	Bb	Min	U/S	Ovality
CR-1	173.48	173.49	173.49	173.48	173.50	173.50	173.48	173.50	0.02MM
CR-2	173.98	173.99	174.00	173.99	173.98	173.99	173.98	174.00	0.02MM
CR-3	173.49	173.50	173.50	173.48	173.49	173.50	173.48	173.50	0.02MM
CR-4	173.98	173.99	173.98	174.00	173.98	174.00	173.98	174.00	0.02MM
CR-5	173.99	173.99	173.98	174.00	173.98	173.99	173.98	174.00	0.02MM
CR-6	173.48	173.49	173.49	173.50	173.50	173.48	173.48	173.50	0.02MM

The tolerance for all six crankpins was maintained within 0.02 MM.

**HIMSEN HYUNDAI 6H 17/28 After Grinding And Polishing**

Expertise and Availability:

RA Power Solutions specializes in onsite crankshaft repair and grinding services worldwide. We have successfully executed projects in Dubai, Fujairah, Qatar, Saudi Arabia, Oman, Iraq, Togo, Malta, Freetown, Egypt, Malaysia, Iran, Indonesia, Vietnam, Jordan, and other locations.

Our skilled technicians are available 24/7 and can be deployed on short notice. Many of our technicians also hold valid US visas, enabling us to offer services in South America, Caribbean countries, and beyond.

For more information about crankshaft grinding and repair services, please contact us:
Email: rajshahani@rapowersolutions.com or info@rapowersolutions.com
Phone: +91 9582647131 or +91 9810012383.

Compressor Crankshaft Grinding | Marine Crankshaft Grinding | Engine Crankshaft Grinding And Polishing – RA Power Solutions

RA Power Solutions is known as a leader in offering onsite repair of crankshaft worldwide with forty years of experience in this field, the company’s endeavor is always to save the Crankshaft from rejection.

The crankshaft meets with serious accidents and is even rejected by the European Repair Companies attended by RA Power Solutions and is successfully repaired. This is possible because of having technicians who have hands-on experience in repairing more than ten thousand crankshafts.

**Crankshaft Grinding Mirrless Blackstone**

All crankshafts are initially checked and inspected to ensure that they are acceptable for reuse or for repair. The onsite crankshaft grinding and crankshaft polishing are undertaken through the window of the engine block. Due to continuous innovation in the design and technology of crankshaft grinding machines manufactured and used by us, it is possible to maintain the dimensional tolerances strictly as per the original equipment manufacturer. The crankshaft grinding and polishing are done in the minimum possible time. Thus, reducing the breakdown time of the equipment considerably.

Presently, we are undertaking crank-pin and main journal grinding and repair up to 700 mm and are in the process of increasing the capacity up to 1000 mm. We undertake onsite crankshaft grinding of all popular makes of engine and their model. Few of them are as following-

**Offshore Grinding of Crankshaft is in Process**

Wartsila 6R32, 12V32, 18v32, Mirrlees Black Stone ESL, MAJOR K series Generators, Ruston, Allen, Yanmar, MAN B&W, Daihatsu engine, etc. For more details on the marine crankshaft repair, and crankshaft grinding machine, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Onsite Crankshaft Repair | Crankshaft Grinding | Crankshaft Reconditioning- RA Power Solutions

Onsite Crankshaft Repair, Crankshaft Grinding, and Crankshaft Reconditioning have been undertaken by RA Power Solutions for the last forty-four years. The company has technicians who are trained to undertake onsite crankshaft repairs strictly as per the manufacturer’s specifications stipulated in the manual.

All technicians have valid CDC and can travel on short notice anywhere in the world to board the vessel. The onsite crankshaft repair and onsite crankshaft grinding equipment used by RA Power Solutions has a main structure manufactured out of Titanium steel, which results in absorption of Vibration while the onsite crankshaft grinding machine is in operation in high seas with turbulence. The quality after the reconditioning and repair of crankshaft is of Great Importance and is maintained. The following checks are undertaken.

Quality of a Re-Machined Pin or Journal

The quality of a pin or journal after machining has to meet the following requirements:

Geometrical tolerance in accordance with manufacturer specifications.
A blueing check has to be carried out on the re-machining surface. Blueing Shells: Min. Width is equivalent to Journal or Crankpin dimensions, respectively. Min. Length is equivalent to 1/5 of the Journal or crank-pin circumference.
Required contact area: Min 35% equally distributed over width and circumferences.
Free of hairline cracks: Journal or crank pin to be tested by means of Magnetic Particle crack detection method.
Free of Martensite: The microstructure is to be tested for edged areas of martensite structure will replicas or micro etching with 5% nitric acid in alcohol (Nital) applied to the pin after polishing.
The maximum admissible hardness of remaining local hardsports: However, such local hardsports are not tolerated around the fillets and the bores for lubrication.

**Onsite Grinding & Repair of Crankpin is in Process**

**Onsite Repair & Grinding of Crankshaft**

For more information about onsite crankshaft repair and grinding, crankshaft grinding, onsite crankpin grinding, etc. Please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.