Betamotor EVO 4t, Руководство по ремонту, Страница: 40 / 80

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ASSEMBLY
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4.1 RIGHT-HAND CRANKCASE
Heat the crankcase in an oven to 150c°. Fit the ball
bearings into their housings (main bearing 1, main-
shaft bearing 2, layshaft bearing 3, gear selector
drum bearing 4), and drive them home with a press
and suitable mandrels, taking care that the crankca-
se is resting on a flat surface throughout. The hou-
sing for the needle roller bearing (gearchange shaft
5), does not have a stop: it can be located flush with
either surface of the crankcase half.
If after the crankcase has cooled down, the outer
race of one of the bearings tends to spin in its hou-
sing, the crankcase itself must be replaced.
N.B. Before refitting the bearings, check the state of
wear of the revolving parts and make sure that the
balls run correctly in their tracks in the bearing.
While the crankcase is still hot, use a press to fit
the shaft (6) for the kickstart idler gear on the right-
hand side.
Fit the breather nozzle (7), applying medium-streng-
th thread lock to the threads.
Fit the oil jets (8) and secure the selector drum be-
aring (4) with its retaining bolts (9), applying me-
dium-strength thread lock tightening these to 10
Nm.
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