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Crankpin and Main Journal Engine Bearings

RA Power Solutions undertakes onsite repair of the crankshaft of main and auxiliary engines installed on vessels and high-capacity engines used for various applications. The crankshaft repair is undertaken by the use of specially designed portable, compact, and lightweight onsite crankshaft grinding machines which are designed, developed, and manufactured by RA Power Solutions.

It is obvious that after grinding of crankpin and main journal of the crankshaft there is a requirement for undersize bearings. It is generally observed that the undersize bearing for the crank pin and main journal of engines are not readily available to the manufacturers of Engines and their agents. RA Power Solutions maintains a large stock of undersize bearings for crankpins and the main journal of the main engine and auxiliary engines of all popular makes and models that are installed on the vessel.

**Crankpin Bearings of Yanmar Diesel Engine Model No. 6N18L-DN**

The bearings are imported from Japan and Europe. The ready availability of bearings reduces the downtime of the engine. All the main journal and crankpin bearings supplied by RA Power Solutions are guaranteed satisfactory performance for 2500 hrs of operation or 12 months from the date of dispatch.

We maintain the stock of bearings for the following engines:

Wartsila , Daihatsu , MWM , Caterpillar , MaN , MaK , B&W , Sulzer , Bergen , Detroit Diesel , Stork Werkspoor , Pielstick , Deutz , Yanmar , MTU , Cummins , Nohab Polar , Caterpillar , Mitsubishi , Yanmar , MaK 551 , MaK 552 , MaK 453 , MaK 451 AK , MaK 452 AK , Deutz 540 , Deutz 358 , Deutz 350, Pielstick PC 2.2 PC 2.5, Wartsila 524 ,Wartsila 824 TS, Sulzer 6 AL 25/30, Sulzer 5 AL 25/30 MWM TBD 484, MaN 40/54 , MaN Sulzer 12 ASV 25/30 , Sulzer 16 ZV 40/48 , Deutz BV 16M 540 , B&W 6L 45 GFCA, MAN B&W 55/GF, CAT D353, B&W 5T23LH, Daihatsu 6 PST 26D, Daihatsu 6 PSHTb 26M, Mak 6MU 451 AK, Deutz 6M 628, Caterpillar 3512, Deutz BV 12M 628, MWM TBD 234, WICHMANN 5AX, SKL 8NVD 48A-2U, Pielstick PC 2.2 LNR, Caterpillar 3508 and more.

Manufacturing of White Metal Bearings

As a repairer of crankshafts having experience of more than forty years in this field, we have come across a situation where the crank pin or main journal diameter is to be reduced more than the last limits specified by the manufacturer. In this situation, the user has no option but to reject the crankshaft and purchase the new crankshaft, the cost of which is exorbitant and the procurement period is long.

Yanmar Diesel Engine Bearing having Diameter of 145 mm — **Yanmar Diesel Engine Bearing has** a **Diameter of 145 mm**

**Undersize Bearings of Yanmar Diesel Engine Model No. 6N18L-DN**

RA Power Solutions can manufacture and supply bearings of sizes that are beyond the manufacturer’s last undersize recommended in the maintenance manual. The supply of these special-size bearings like bearings for the Yanmar engine helps to save the crankshaft from rejection.

The grinding of the crankshaft, supply of special-size bearings, and commissioning of the engine are done under the same roof by RA Power Solutions and all the jobs are executed with guaranteed satisfactory performance.

RA Power Solutions is providing major engine overhauling & repair of high-capacity engines installed on the ship & in industries. Our technicians are experienced & they have worked with reputed engine manufacturers like Wartsila, Caterpillar, Mirrlees Blackstone, Cummins, etc.

Repair & Overhauling of Engine on Board a Vessel

The following jobs are undertaken pertaining to major engine overhauling, engine repair & engine bearing offered by RA Power Solutions:

Inspection of all parts after disassembly of the Engine.

Preparation of report in detail of parts inspected & overhaul of Engine.
Most of the parts are repaired or reconditioned by RA Power Solutions on-site with portable equipment & dedicated team of technicians.
Assembly of parts maintaining clearance strictly as specified in the manual.
Complete assembly of the Engine.
Load trial of the Engine.

Following is the description of activities of a major overhaul of the MAN B&W L23/30H auxiliary engine undertaken recently.

Dismantled all units of cylinder heads.
Removal of all inlet valves, exhaust valves, and valve guides.
Renewal of all valve spindles, inlet valves, exhaust valves, valve guides, guide O rings, valve rotators, and valve springs.
Reconditioning of all valve spindle seats and valve seat rings.
Dismounting, cleaning, and Inspection of all cylinder heads cooling water space and replacement of all O rings.
Inspection and cleaning of all fuel injector sleeves.
Lapping of all cylinder liner and cylinder head sealing face.
Pressure testing of all cylinder heads at 6 bar.
Inspect and check clearances of all valve gears, valve bridges, and push rods.
Renewal of all cylinder liner sealing joints.
Dismounted all unit pistons and connecting rods, and replaced all connecting rod big-end bearing shells—cleaning all pistons and replacement of all piston rings.
Inspection and de-glazing of cylinder liners. Measurement of all units cylinder liner piston ring butt clearances and all pistons vertical groove clearances.
Measurement of camshaft bearing clearances with filler gauge.
Dismount, overhaul and remount all 7 nos fuel injection valves and renewal of the nozzles.
Dismount and clean the lube oil filter and renew all four filter elements with the original new one.
Dismount and clean the lube oil cooler.
Dismount the charged air cooler, and clean the more relaxed element by immersion in detergent and compressed air.
Dismount and clean both the turbine and compressor sides of the turbocharger.
Took crankshaft deflection measurement with spring-loaded dial gauge
Adjusted the inlet and exhaust valve clearances.

Engine Overhauling

Engine Overhauling services are extended by RA Power Solutions Pvt. Ltd. through our experienced engineers who have worked for engine manufacturers of repute like Mirrlees Blackstone, Ruston, Caterpillar, Wartsila, Cummins, etc. We have our standard procedure and technical formats which are strictly followed by our engineers at the time of overhauling of the engine. All the jobs of overhauling are undertaken with a guarantee.

RA Power Solutions has a large team of engineers & technicians available 24/7 all of them have valid Indian CDC & Palau CDC & can travel to any destination on short notice.

Discover top-notch engine-bearing solutions at RA Power Solutions. Our expert team offers high-quality engine bearing services for engines, ensuring smooth performance and longevity. From inspection to repair and replacement, trust us for precision and reliability in every aspect of engine bearings. Enhance your engine’s efficiency with RA Power Solutions today.

The author is Mr. Raj Shahani, Managing Director of RA Power Solutions Pvt. Ltd. He has 40 years of experience working on large crankshafts and Diesel Engines. He is on the board of directors of reputed shipping companies and companies having a large number of Diesel power plants.

For more information regarding engine bearing and engine overhauling, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Tag: engine bearings

Special Size Engine Bearings | Undersize Marine Engine Bearings

Crankpin and Main Journal Engine Bearings

We maintain the stock of bearings for the following engines:

Major Engine Overhauling | Engine Repair | Engine Bearing

The following jobs are undertaken pertaining to major engine overhauling, engine repair & engine bearing offered by RA Power Solutions:

Following is the description of activities of a major overhaul of the MAN B&W L23/30H auxiliary engine undertaken recently.

Engine Overhauling