Diesel Engine Cylinder Liners

RA Power manufacturers cylinder liners of most popular make and models of diesel engine. The cylinder liners are centrifugally cast and metallurgical composition is maintained as per the manufacturers.  The cylinder liners can also be developed and manufactured as per the cylinder liner drawing or a sample. 

Cylinder Liners

We also supply used, reconditioned cylinder liners supported with calibration report and performance guarantee. Models for which we manufacture cylinder liners are MAN-B&W, Sulzer, Wartsila, Mak, Deutz, Mitsubishi, Caterpillar, Daihatsu, Bergen, Niigata, Himsen, Allen, Stork, Fiat, MWM, Hanshin, SKL, Ruston, Paxman, Crepelle, Yanmar , Mirrlees, Alco, ABC, Crepelle, Pielstick, Nohab etc.

Rebabbitting of Bearings- RA Power Solutions

 

Re Babbitting Bearing

It is recommended to go for rebabbitting of bearings after certain hours of operation of crankshaft, rotor shaft, turbine shaft, pump shaft and alternator shaft. RA Power Solutions undertakes rebabbitting of white metal bearings. The white metal composition is maintained as per the original Babbitt metal of bearing. The rebabbitting of white metal bearing is done by centrifugal process which ensures strong bonding between the white metal and the base metal of the Babbitt white metal bearing.

On Site Rotor Shaft Grinding and Polishing

Grinding and Polishing of Rotor Shaft

 

Rotor shaft grinding and polishing is required due to development of taper and ovality on the rotor shaft diameter, pitting and deep bearing marks. It is important that the rotor shaft bearing sitting area is within the tolerances in terms of taper, ovality and surface finish. RA Power Solutions undertakes onsite grinding and polishing of rotor shaft. 

There is no need of removing the rotor shaft from the casing. The bearings are removed and insitu grinding of rotor shaft is undertaken. Rotor shaft is normally placed on white metal bearing. We also manufacture new white metal bearing for rotor shaft and  undertake rebabbitting of white metal bearings.

Onsite Grinding of Crankshaft- Pilger Tube Reducing Mill

RA Power Solutions has successfully executed repair of crankshaft of Pilger Tube Reducing Mill which was badly damaged. The crankshaft is more than 50 years old. We can undertake onsite grinding of shafts up to 700 mm. In this case rebabbitting of old bearings is also done. The job is executed successfully by RA Power Solutions technicians. For more information, please visit https://www.youtube.com/watch?v=aaacgrLmLxE

New and Reconditioned Marine Engine and Spare Parts

Marine Engine Spare Parts

The satisfactory performance of engine depends on regular services and use of quality spare parts. RA Power Solutions has network to procure spare parts from the Original equipment manufacturer (OEMs). The spare parts supplied are as per the manufacturer specifications and are competitive price. 

RA Power Solutions also procures marine engine and spare parts from the ship breaking yards and have in-house facilities to recondition them. The parts are supplied with the calibration report and guarantee. Ready stocks of spares of almost all make of engine are available. The main spare parts available are crankshaft, Alfa Laval Heat exchangers, Centrifugal Pumps, Mechanical Seal, Grundfos Pumps, Turbocharger, Electric Motors, connecting rod, etc.

Metal Locking and Metal Stitching Process

Repair of Cracked Engine Block

RA Power Solutions undertakes repair of broken engine blocks by metal stitching process. It is generally observed that due to failure of connecting rod the engine block casing is either cracked or broken into pieces. In case of high capacity engine it is difficult to replace the damaged engine block due to exorbitant cost and long duration of supplies.



In case of vessel it is difficult to remove the damaged crankcase from the engine room. In this situation onsite repair of crankcase is recommended by metal stitching and metal locking process. This is cold process, no heat or stresses are developed.

Metal Stitching of Engine Block

It is of great importance that the keys and locks of appropriate metallurgical properties are used. Again the execution of crack repair of engine block by metal stitching needs a well experienced technician to execute. In case of cracked engine block, it is necessary that the damaged area of the crankcase is thoroughly cleaned chemically and red oxide is removed the magnetic particle test or die penetrant test is undertaken in order to check the length and width of the crack. Once the exact location and length of the crack is determined the repair by metal stitching and metal locking are executed. This is a proven method for repair of cracks.

Repair by Metal Locking of Lower Crankcase

RA Power Solutions has more than three decades of experience in successfully executing repair of cracked casting, engine block, cylinder heads, turbine casing, gear boxes, etc. by metal locking and stitching process.

Importance of Repairing Connecting Rods

Connecting Rod Repair

The repair of connecting rod is of great importance to ensure the smooth and uninterrupted operation of the engine. It is observed that while the engine is continuously running the connecting rod big end bore develops taper and ovality or gets distorted similarly the small end of the connecting rod which generally has a gun metal or similar bush gets worn out of the certain hours of operation of the engine. It is advisable to conduct regular inspection of the connecting rod or at the time of undertaking major over hauling. Following is the process for inspection of the connecting rods. The connecting rods should be properly cleaned with a special attention to its serration. The connecting rod is subject to magnetic particle test for crack detection. It is generally observed that due to stress the hairline cracks are developed which are not desirable. The crack detection test can also be done by a simple die penetrant test. It is advisable to undertake the MPI and die penetrant test of connecting rods bolts and nuts as well.

The connecting rods bolts are tightened on a specified torque either manually or by hydraulic process. It is important that the torque is maintained strictly as specified in the manual.  The taper and the ovality are checked of big end bore. It is advisable to take as many readings as possible. The similar inspection is to be done for the small end bore as well.

In case of over sizing, taper and ovality it is recommended to either machine the serration on reduce the big end bore by doing the lapping of the serrations. Special purpose machines are available to undertake the lapping of the serration. The small end bush should be replaced in case of damage or excessive taper or ovality. It is recommended that the boring operation of big end and small end should be done on a boring machine which can maintain the tolerances as specified by the manufactures. Most of the cases for high capacity engines the maximum allowed taper and ovality is within 0.05mm.  The straightness of the connecting rods is of again real importance and this can also be checked on the boring machine before the correction of big end and small end bore.

All the connecting rods big end bores should either be replaced after certain hours of operation as mentioned in the manual or they should be checked periodically for its elongation. In case they are observed to be within the limits the bolts should be checked for the crack detection by MPI process. Any crack on the bolts is not permissible as it can results to the damaged to the connecting rods, engine block and other parts of the engine.

RA Power Solutions is undertaking re-sizing, repair and reconditioned of connecting rods for last more than 36years successfully. The connecting rods are repair strictly as per the specification and tolerances of the engine manufactures. Connecting rods after repair can also be subject to class approval in case required by the client. We can also supply reconditioned connecting rods of all make and models of the engine.