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Crankshaft and crankcase
Press out the crankshaft from the flywheel
side’s crankcase half.
Heat each crankcase half so that the ball
bearing can be removed.
Clean both crankcase halves.
Check that the oil tank vent is open.
Fitting
Fit new ball bearings and sealing rings.
Heat the clutch side’s crankcase half and
put the ball bearing in position.
Use the same tool and press out the
crankshaft from the flywheel side’s crank-
case half.
Inspect the crankshaft as per the section
”Checking of crankshaft”.
Heat each crankcase half to 150–200° C
by means of a heat gun.
Tap the crankcase half against a piece of
wood so that the ball bearing falls out.
Press off the sealing ring from the flywheel
side’s crankcase half.
Fitting
Fit new ball bearings and sealing rings.
Heat the clutch side’s crankcase half to
150–200° C and put the ball bearing in
position from outside.
Use a wooden block as a stop so that the
ball bearing comes level with the inner
side of the crankcase.
Clean both crankcase halves and carefully
scrape off residual gasket from the sealing
surfaces.
The oil tank vent is in the clutch side’s
crankcase half. Check that it is open by
blowing in the plastic hose.
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