Repair of Crankshaft of MAN Engine Archives - Crankshaft Grinding Repair

Bearings For Yanmar | Daihatsu | MAK | MAN

crankshaft — Mon, 16 Dec 2024 10:44:06 +0000

Bearings for Popular Make of engines installed on vessels, such as main engines or auxiliary engines, are available with RA Power Solutions.

RA Power Solutions is a leading onsite crankshaft repair company, extending services for over 44 years all over the world. We understand the requirement of standard and undersize bearings especially after the grinding of the crankshaft is executed it is difficult to get the undersize bearings, as their delivery period is long and it is not possible for the ship owner to hold the vessel indefinitely.

RA Power Solutions in order to facilitate clients, especially from the shipping industries, maintain a large stock of crankpin/main journal bearings. The bearings are available with us in different undersizes, as recommended by the manufacturer.

In most cases, our technicians hand carry the undersize bearings with them and the same are assembled immediately after grinding of the damaged crankshaft is undertaken, this saves breakdown time. The bearings of most of the popular make and models are available.

A list of a Few Models is given below:

Sr No.	Description
Yanmar Engine S 185L Standard Crankpin Diameter-140 mm
1	a) 0.80 mm Undersized Crankpin Bearing
	b) 1.20 mm Undersized Crankpin Bearing
	c) 1.60 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

Yanmar Engine 6N18AL-DN/DV Standard Crankpin Diameter-145 mm
2	a) 0.40 mm Undersized Crankpin Bearing
	b) 0.80 mm Undersized Crankpin Bearing
	c) 1.20 mm Undersized Crankpin Bearing
	d) 1.60 mm Undersized Crankpin Bearing
	e) 2.00 mm Undersized Crankpin Bearing
	f) 2.40 mm Undersized Crankpin Bearing
	g) 2.80 mm Undersized Crankpin Bearing

Daihatsu 6DL -16 Standard Crankpin Diameter-120 mm
3	a) 2.50 mm Undersize Crankpin Bearing
	b) 3.00 mm Undersize Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

Daihatsu 5DC-17 Standard Crankpin Diameter- 145 mm
4	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing
	g) 4.00 mm Undersize Crankpin Bearing

Daihatsu 5DK-20 Standard Crankpin Diameter-170 mm
5	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing
	f) 3.00 mm Undersized Crankpin Bearing
	g) 3.50 mm Undersized Crankpin Bearing
	h) 4.00 mm Undersized Crankpin Bearing
	i) 5.00 mm Undersized Crankpin Bearing

Daihatsu 8DKM-28 Standard Crankpin Diameter-235 mm
6	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing

MAK 8M20Standard Crankpin Diameter-152 mm
7	a) Standard Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

MAN CME 5L 16/24 Standard Crankpin Diameter- 130 mm
8	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing

MAN 6L 23/30H Standard Crankpin Diameter-185 mm
9	Key Position 12.5 x 15.5
	a) 1.50 mm Undersized Crankpin Bearing
	Key Position 7.7 x 10.7
	a) 1.50 mm Undersized Crankpin Bearing
	b) 2.00 mm Undersized Crankpin Bearing

MAN 9ASL 25/30 Standard Crankpin Diameter-195 mm
10.	a) 2.50 mm Undersize Crankpin Bearing
	b) 3.00 mm Undersize Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

We regularly supply engine bearings for crankpins, tri-metal bearings, engine tri-metal bearings, and bearings for all makes and models of engines like Yanmar, Daihatsu, MAK, MAN B&W, etc.

For more information regarding Yanmar, Daihatsu, MAN, MAK bearings, Repair of Crankshaft of Daihatsu, crankshaft bearing journal grinding service, in situ crankshaft grinding and repair of MAN engine, MAN Engine Crankshaft Repair, Repair of crankshaft of MAN Engine contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91-9582647131 or +91-9810012383.

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MAN B&W 5L 16/24 Crankshaft Repair While Sailing of The Vessel

crankshaft — Wed, 17 Apr 2024 06:50:36 +0000

RA Power Solutions is the only company in the world that can undertake onsite grinding of crankshafts up to 700 mm in diameter even while the vessel is sailing. We successfully repaired one crankpin of a MAN B&W 5L 16/24 engine while the vessel was sailing from Fujairah Anchor (Dubai) to Galle Port, Sri Lanka.

Due to the ship owner’s commitment, they were unable to hold the vessel at the Fujairah Anchor (Dubai) and wanted the repair of damaged crankpin number four of the MAN B&W 5L 16/24 to be executed while sailing the vessel.

RA Power Solutions deployed two technicians to Fujairah Anchor (Dubai) with a specially designed and compact onsite crankshaft grinding machine. In the case of the MAN B&W 5L 16/24, the standard crankpin diameter is 130 mm, and the bearing length is only 56 mm, which is considered to be very small. RA Power Solutions has designed, developed, and manufactured dedicated crankshaft grinding equipment capable of grinding crankpins without removing the crankshaft from the block.

MAN B&W 5L 16/24 Onsite Crankshaft Machining

Inspection of damaged crank pin number four was conducted, and it was observed that the minimum diameter of damaged crankpin number four was as follows.

The minimum diameter of crankpin number four is observed as 129.39 mm.
The maximum diameter was observed at 130.00 mm.

S. No.	Crankpin Details
1.	Engine Make	MAN B&W
2.	Engine Model	5L 16/24
3.	Crankpin Diameter Standard	130.00 MM
4.	Crankpin Bearing Width	56.00 MM
5.	Place of execution of grinding of crankpins	Fujairah Anchor (Dubai) to Galle Port Sri Lanka

Thus, an ovality of 0.61 mm was observed, which is considered to be on the higher side. RA Power Solutions technicians executed the grinding of crankpin number four of MAN B&W 5L 16/24 while sailing from Fujairah Anchor (Dubai) to Galle Port, Sri Lanka. The crankpin number four was undersized by 1 mm, and the final diameter was maintained at 129.00 mm.

MAN B&W 5L 16/24 Crankshaft MPI Test

Huge Savings of Ship Owners Due to Execution Of Crankshaft Repair Which Sailing of the Ship

The repair of the crankshaft of the MAN B&W 5L 16/24 executed by RA Power Solutions resulted in huge savings for ship owners. We have the equipment, technology, and processes to execute crankshaft repairs while the vessel is sailing, with absolutely no requirement to hold the vessel for crankshaft repair.

The author is Mr. Raj Shahani, Managing Director of the company. He has 44 years of experience in grinding crankshafts, polishing crankshafts, and all services related to engine and supporting equipment repair. He has designed and developed a portable crankshaft grinding machine to save time and money.

MAN B&W 5L 1624 Machining Of Crankshaft

We have been regularly providing our services in Canada, Australia, Bangladesh, Canada, Dubai, Greece, Haiti, Hong Kong, Indonesia, Kenya, Malaysia, Maldives, Kenya, Kuwait, Madagascar, Mexico, Nigeria, Oman, Philippines, Saint Lucia, Saudi Arabia, Singapore, Spain, Sint Maarten, Sri Lanka, Suriname, Thailand, Togo, United Kingdom, United States, Yemen, Zambia, etc.

For more details, crankshaft repair on vessel, onsite crankshaft grinding machine, grinding of crankshaft main journal, main journal crankshaft grinding service, crankshaft journal polishing and grinding, main journal polishing and in situ crankshaft grinding please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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MAN Engine Crankshaft Repair By RA Power Solutions

crankshaft — Wed, 26 Jul 2023 09:18:18 +0000

RA Power Solutions was advised about the damage to the crankshaft of MAN B&W 9L27/38 on board the vessel. The vessel was stranded at Lumut Port Malaysia due to the non-performance of the main engine of MAN. We deputed a team of two technicians with the necessary onsite crankshaft grinding equipment to undertake the inspection and repair of the crankshaft.

The details of the Engine are mentioned below

S. NO	Crankshaft Details
1.	Engine Make	MAN Aux. Engine
2.	Engine Model	9L 27/38
3.	Crankpin Diameter Standard	250 mm
4.	Crankpin Bearing Length	96 mm
5.	Place of execution of crankshaft repair	Lumut Port Malaysia

Following are the main observations of the crankshaft of MAN Aux. Engine Model No. 9L 27/38

On visual inspection by our technicians, it was observed that crankpin no. 2 has a deep depression mark measuring about 40 x 25 mm.
The minimum and maximum dimensions of crankpin no. 2 were observed as following
- Standard dimensions of crankpin: 250 mm
- Minimum size observed: 247.80 mm

Thus the ovality of more than 2.2 mm was observed.

Our technicians reported that damage to the Crankpin is more as the micrometer is not able to take the reading due to the nature of the damage. The crank pin was subject to crack detection by MPI and no cracks were observed.
The hardness was taken off the crankpin. The hardness ranging between 260 to 300 on the HB scale was observed. On a few scattered areas, the hardness was as high as 616 on the HB scale.

Damage Crankpin before Repair of MAN Engine 9L 27/38 Crankshaft

Crankshaft Repair MAN Aux. Engine model 9L 27/38

Planning for Repair of Crankshaft of MAN Engine Model No. 9L 27/38

During the discussions with the technical staff of the vessel, it was informed that a crankshaft repair company from Singapore inspected the damaged crankpin no. 2. They observed higher hardness and have undertaken local grinding of the hard spots by a hand grinder. The exact depth of hand grinded area cannot be measured.

The decision was taken by RA Power technicians to undertake grinding of the crankpin.

Our technicians checked the hardness of the crank pin at every step while under-sizing it, to our surprise, the hardness was coming down as the grinding was done.
Our technicians have undertaken the grinding to the undersize of 4.0 mm and the maximum hardness observed is 328 mm.
The damaged crankpin has been successfully repaired.

Onsite Crankshaft Repair

Process of grinding of the crankshaft of MAN Aux. Engine model

Damaged to the crankpin by a Singapore-based company

Due to the lack of knowledge and experience the hand grinder was used to check the hardness which in turn rather damaged the crankpin. A crankshaft is the most expensive part of a diesel engine and experienced companies must be engaged for repair. It is our experience of forty-two years that hardness increases whenever there is a seizure of the bearings and in most cases it is a skin hardness that reduces after grinding is done.

Onsite Crankshaft grinding under progress

After grinding & polishing of damaged crankpin

For guaranteed repair of the crankshaft, MAN engine crankshaft repair, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

The post MAN Engine Crankshaft Repair By RA Power Solutions appeared first on Crankshaft Grinding Repair.