High Capacity Engine and Rotatory Equipments have the components made of Cast Iron and Cast Steel. In case of any damage and development of crack in Olden times, the option was either to replace the component which used to work out very expensive or to repair it by welding process. Which was not always successful.
RA Power Solutions has the team of experience technicians. They can travel to the site with tools and consumables required for metal stitching and metal locking and undertake the repair. The original profile after crack repair by metal locking and metal stitching is maintained and in most cases, no machining is required. It is scientifically proved that crack portion of the component which is repaired by metal locking and metal stitching process has more tensile strength.
RA Power Solutions with the experience of forty years in this field extends metal locking and metal stitching services for repair of damaged casting. The repair can also be executed while sailing of Vessel. We are considered to be lowest in the cost in comparison to our competitors.
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RA Power Solutions was informed by one of our client regarding damage of cam case cover of MAN diesel engine on board a vessel sailing near China.
The details including photographs were examined and it was observed while the cam case cover was broken in to pieces the threads on the engine body and the dowel pin were also damaged.
RA Power Solutions deputed their team of technicians on board the vessel and they executed the repair of engine block, cam case cover sitting area by following procedure:
I) The broken bolt which remained inside the thread hole was drilled out.
II) The damaged threads on cam cover sitting area on entablature was removed by drilling new blind holes, suiting the new M12 Helicoil thread inserts.
III) Re-tap holes for the new M12 Helicoil thread inserts was done carefully.
IV) New M12 Helicoil thread inserts were installed in the engine frame/ entablature.
V) The 2 guide pins for the roller guide housing were removed taking due precaution.
VI) New roller guide housing was installed, with correct M12 hexagon bolts and including the newly introduced 10 mm washers.
VII) After final alignment of the roller guide housing, the bolts were tightened with the correct tightening torque.
VIII) Finally the two ø8 mm guide pin holes were drilled in both roller guide housing and engine frame and afterwards newguide pins were installed
The repair of threads by thread repair inserts (helicoil inserts) proved to be successful as the engine is performing satisfactory and no oil leakage is observed. The shipping company owners were asked to replace the complete engine block by the manufacturers as per them it was not possible to execute this kind of repairs.
The above job was successfully executed by a team of experienced and dedicated team of RA Power solutions.
The author is Mr. Raj Shahani Managing Director of RA Power Solutions having experience of almost four decades of working on high capacity diesel engines, turbines and rotary equipments. The company specializes in executing the repairs i.e. metal stitching/metal locking, grinding and repair of crank shafts, rebabbitting of bearings, connecting rod reconditioning, overhauling of Engines which have serious problem resulting to the immense saving to the owners.
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