dac Posted September 15, 2010 Report Share Posted September 15, 2010 I,VE SPLIT THE ENGINE OF MY 212CC 247 AND HAD A NEW BIG END BEARING FITTED AND BALANCED. I,VE FITTED NEW MAIN BEARINGS AND SEALS BUT I'M NOT SURE HOW TO REFIT THE CRANK. DO I HEAT THE BEARINGS TO DROP THE CRANK IN ,AS I DON'T WANT TO HAVE TO STRIKE THE CRANK AS ITS BEEN BALANCED ?? THANKS. Quote Link to comment Share on other sites More sharing options...
lowbrow Posted September 16, 2010 Report Share Posted September 16, 2010 I'm not familiar with this crank, but can't you draw it through the bearings by using tubular spacers and the threaded ends of the shaft? Quote Link to comment Share on other sites More sharing options...
dac Posted September 16, 2010 Author Report Share Posted September 16, 2010 Thanks for that , i'll give it a try. With the cases being Magnesium I didn't want to force it, or pull it through at an angle. Quote Link to comment Share on other sites More sharing options...
baldilocks Posted September 19, 2010 Report Share Posted September 19, 2010 (edited) Fit the crank as best you can to one crankcase and lie it on a bench, supported so that the protruding end of the crank doesnt hit the bench. You need to ensure all of the gears are spinning freely in the case before you start this. Then put the other crankcase onto the crank and gently tap with a rubber mallet, avoid gasket mating surfaces and work on opposites within 360 degrees of the crank. If there is a lot of resistance locate where it is gearbox or crank and check if somthing is not located correctly. make sure to correctly align any dowellings and dont forget to fit the centre gasket if there is one. I wouldnt advise heating the bearing as it may damage the seal on the other side. Edited September 19, 2010 by Baldilocks Quote Link to comment Share on other sites More sharing options...
dac Posted October 1, 2010 Author Report Share Posted October 1, 2010 Fit the crank as best you can to one crankcase and lie it on a bench, supported so that the protruding end of the crank doesnt hit the bench. You need to ensure all of the gears are spinning freely in the case before you start this. Then put the other crankcase onto the crank and gently tap with a rubber mallet, avoid gasket mating surfaces and work on opposites within 360 degrees of the crank. If there is a lot of resistance locate where it is gearbox or crank and check if somthing is not located correctly. make sure to correctly align any dowellings and dont forget to fit the centre gasket if there is one. I wouldnt advise heating the bearing as it may damage the seal on the other side. Quote Link to comment Share on other sites More sharing options...
dac Posted October 1, 2010 Author Report Share Posted October 1, 2010 Thanks Baldilocks, with a bit of heat and gentle deadblow hammer it slipped in a treat. Sounds great but looks to good to get dirty. Quote Link to comment Share on other sites More sharing options...
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