September 15, 201015 yr 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.
September 16, 201015 yr 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?
September 16, 201015 yr Author 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.
September 19, 201015 yr 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, 201015 yr by Baldilocks
October 1, 201015 yr Author 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.
October 1, 201015 yr Author 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.
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