Diesel Engine Overhaul | Diesel Engine Repair | Crankshaft Main Bearing Replacement – RA Power Solutions

RA Power Solutions was informed regarding the failure of three nos Crank pin Bearings of MAN B&W 5L60MC main engine onboard a vessel near South Africa.

RA Power experienced team of technicians boarded the vessel in a short time of 18 hours of receipt of intimation regarding the problem faced by the vessel. Following jobs were executed for overhaul and replacement of crankpin bearings in order to operate the engine satisfactorily after Engine repair and Engine overhaul.

MAN B&W 5L60MC Engine Repair & Overhauling is in Process
MAN B&W 5L60MC Engine Repair & Overhauling is in Process
DESCRIPTION:

I) Inspection and overhaul of the cylinder covers including the fuel and starting valves located in the covers.

II) The cylinder covers cooling spaces were also inspected, cleaned and fitted back with new O-rings.

III) Dismounting, Inspect and overhaul of the exhaust valves, renewed the seats and grinding the valve spindles.

IV) The cylinder liners were cleaned, calibrated and honed in order to restore the liners running surfaces and remove ovality. This ensured that the piston rings perform better and this will lead to a better overall cylinder condition, compared to if honing had not been done. The cylinder liners cooling spaces were also inspected, cleaned and fitted back with new o-rings.

Inspection of Engine Spares is in Process
Inspection of Engine Spares is in Process
Inspection and Repair of Crankshaft
Inspection and Repair of Crankshaft
V) The Crank pin  bearing caps were dismounted, both top and bottom bearing shells renewed

VI) The Crankshaft Crankpin  diameter was checked for the following parameters:

a) Visual inspection to check the presence of any Bearing Line marks or rough surface.

b) All the Crankpins were calibrated for taper & ovality.

c) Hardness was checked and observed within limits.

d) MPI was done to check the presence of any crack.

e) Crankshaft all pins were polished by onsite Crankshaft Grinding Machine removing the bearing line marks and for improving the Crank pin surface finish.

Onsite Repair of Crankpin by Crankshaft Grinding Machine
Onsite Repair of Crankpin by Crankshaft Grinding Machine
VII) Adjustment of the variable injection timing (VIT)

VIII) The bearing clearances were taken using lead wire

IX) Crankshaft alignment measurement was taken with a dial gauge.

Conclusion: After replacement of Bearings & Jobs described above undertaken at the time of Engine overhaul & Bearing replacement the engine was tested on the load & performance was observed satisfactory.

Repair of Crankpin is in Process
Repair of Crankpin is in Process
Inspection of Connecting Rod on Moving Vessel
Inspection of Connecting Rod on Moving Vessel

RA Power Solutions was informed regarding the failure of three nos Crank pin Bearings of MAN B&W 5L60MC main engine onboard a vessel near South Africa. RA Power experienced team of technicians boarded the vessel in a short time of 18 hours of receipt of intimation regarding the problem faced by the vessel. Following jobs … Continue reading “Diesel Engine Overhaul | Diesel Engine Repair | Crankshaft Main Bearing Replacement – RA Power Solutions”

Crankshaft Repair at Low Cost – RA Power Solutions

Crankshaft repair is required in case of following observations:

I) Development of taper and ovality due to continuous running.

II) Seizure of bearing, increase in hardness and development of crack

III) Loss of alignment of crankshaft or change in web deflection of crankshaft and many more reasons

RA Power Solutions Pvt. Ltd. undertakes crankshaft repair. We have team of experienced technicians who undertake crankshaft repair onsite.

These days there is no need of removing the crankshaft from the Engine block and send it to workshop for crankshaft repair.

RA Power Solutions undertakes crankshaft repair, crankshaft grinding and crankshaft polishing onsite without removal of crankshaft from the engine block. The onsite repair of crankshaft not only reduces the downtime but saves considerable cost in terms of removal of crankshaft, packing, transportation etc.The sending of  crankshaft to the workshop now is outdated.

RA Power Solutions have facility to undertake onsite crankshaft repair from 50 mm to 700 mm diameter.

Damaged Crank Pin of MAN Diesel Engine
Damaged Crank Pin of MAN Diesel Engine
Crack Detection of Crankpin Before Grinding
Crack Detection of Crank-pin Before Grinding

 

 

 

 

 

 

 

Having more than 37 yrs of experience, we have highly skilled in house technicians to execute crankshaft repair.We are most respected and cost effective company in Asian region.  We also manufacturer crankshaft repair machine/crankshaft grinding and polishing machine which is light weight, easy to operate.

Crankshaft Grinding of Damaged Crankpin on Board the Vessel
Crankshaft Grinding of Damaged Crank pin on Board the Vessel
Crankshaft Repair on Board the Vessel
Crankshaft Repair on Board the Vessel

 

 

 

 

 

 

 

The range of machine is from 50 mm to 700 mm which is reasonably priced and we have sold more than 63 machines all over the world.

Crack Detection of Crankpin After Grinding
Crack Detection of Crank pin After Grinding
Crankpin After Grinding
Crank-pin After Grinding

 

 

 

 

 

 

 

Author of this blog is Raj Shahani, Managing Director of RA Power Solutions Pvt. Ltd. having experience of more than 36 years. Company deals in onsite crankshaft grinding, crankshaft repair, rebabbitting of bearings, metal stitching/metal locking of cast iron, connecting rod repair, etc.

Crankshaft repair is required in case of following observations: I) Development of taper and ovality due to continuous running. II) Seizure of bearing, increase in hardness and development of crack III) Loss of alignment of crankshaft or change in web deflection of crankshaft and many more reasons RA Power Solutions Pvt. Ltd. undertakes crankshaft repair. … Continue reading “Crankshaft Repair at Low Cost – RA Power Solutions”

Portable Crankshaft Polishing Machine – RA Power Solutions

In case of bearing failure or continuous running of crankshaft it develops bearing line marks, pitting or rough surface. This requires polishing of crankshaft, crankpin and main journal.

Revolutionary onsite portable crankshaft polishing machine has been introduced by RA Power Solutions Pvt. Ltd. which is portable, light weight, easy to operate and can be taken to the site. The polishing of crankshaft, crankpin is possible without removing the crankshaft from the engine block. The onsite crankshaft polishing machine is manufactured from 50 mm to 700 mm diameter.

The use of crankshaft polishing machine removes the bearing line marks, pitting and improves the surface finish as required by the manufacturer.

We extend free training to the customers having duration of 1 week during which the operation of crankshaft polishing machine, maintenance are explained and demonstrated.

The cost of machine is kept low as it is the company’s objective that nobody should spend exorbitant amount on polishing and grinding of crankshaft anymore and sending it to the workshop.More then 60 machines are sold all over the world.

 

Crankshaft Polishing Machine Packed in Steel Box
Crankshaft Polishing Machine Packed in Steel Box
Packing in Progress Insitu Crankshaft Grinding Machine
Packing in Progress Insitu Crankshaft Grinding Machine

 

 

 

 

 

 

 

Close Up View of Crankshaft Polishing Machine After Packing
Close Up View of Crankshaft Polishing Machine After Packing
Crankshaft Grinding Machine Packed in Steel Box
Crankshaft Grinding Machine Packed in Steel Box

 

 

 

 

 

 

 

Author is Mr. Raj Shahani, Managing Director of RA Power Solutions Pvt. Ltd. having 37 years of experience in working on large crankshafts. The crankshaft grinding and polishing machine has been developed through a consistent and focused R&D with field trails undertaken in different conditions.

The aim of the company is to reduce the cost of repair of crankshaft and stop the outdated practice of sending crankshaft to the workshops.

In case of bearing failure or continuous running of crankshaft it develops bearing line marks, pitting or rough surface. This requires polishing of crankshaft, crankpin and main journal. Revolutionary onsite portable crankshaft polishing machine has been introduced by RA Power Solutions Pvt. Ltd. which is portable, light weight, easy to operate and can be taken … Continue reading “Portable Crankshaft Polishing Machine – RA Power Solutions”

Crankshaft Repair While Sailing – RA Power Solutions

Crankshaft repair by grinding and polishing is now possible while vessel is on move. RA Power Solutions Pvt. Ltd. is the first company to offer crankshaft repair services while vessel is sailing by onsite portable crankshaft grinding equipment which is taken on board the vessel. The crankshaft repair is undertaken by vibration free crankshaft grinding machine without removing the crankshaft from the engine block thus saving time and cost.

MAN B&W STX 6L23/30H
MAN B&W STX 6L23/30H

RA Power Solutions Pvt. Ltd. undertakes onsite crankshaft grinding and polishing on board the vessel while sailing up to 700 mm diameter.

RA Power Solutions Pvt. Ltd. has recently undertaken grinding of all 6 CR pins of MAN B&W STX 6L23/30H while sailing of vessel between ports of Malaysia and Indonesia. The crankpins were damaged due to lack of lubrication oil and all the pins were undersized by 0.5 mm. The tolerances after grinding and polishing have been maintained as per the manufacturer’s requirements.

Repair of Crankshaft in Engine Block
Repair of Crankshaft in Engine Block

RA Power Solutions Pvt. Ltd. has designed vibration free onsite crankshaft grinding and crankshaft polishing equipment by which it is possible to execute crankshaft repair while ship is on move. This saves the time and keeps vessel moving.

Crack repair of engine block, cylinder heads, casing and all broken castings on board a vessel is possible while sailing. We are the first company to introduce these services.

Crankpin Under Test to Check Crack
Crankpin Under Test to Check Crack
Dye Penetrant Test of Crankpin
Dye Penetrant Test of Crankpin

 

Onsite Crankshaft Grinding Machine from Engine Block
Crankshaft Grinding While Sailing
Crankpin Under Grinding Process
Crankpin Under Grinding Process

 

 

 

 

 

 

Crankpin Ready After Grinding and Polishing
Crankpin Ready After Grinding and Polishing

 

 

 

 

 

 

Crankshaft Polishing in Process by Crankshaft Polishing Machine
Crankshaft Polishing in Process by Crankshaft Polishing Machine

Crankshaft repair by grinding and polishing is now possible while vessel is on move. RA Power Solutions Pvt. Ltd. is the first company to offer crankshaft repair services while vessel is sailing by onsite portable crankshaft grinding equipment which is taken on board the vessel. The crankshaft repair is undertaken by vibration free crankshaft grinding … Continue reading “Crankshaft Repair While Sailing – RA Power Solutions”