VESPA 664787 Service Station Manual page 91

Vespa S 50 2T
- Using the specific tool remove any bearings left
on the half crankcase
Specific tooling
001467Y007 Driver for OD 54 mm bearing
001467Y006 Pliers to extract 20 mm bearings
Refitting the crankshaft bearings
Heat the bearings in an oil bath at around 150°C
and fit them on the crankshaft, if necessary using
a section of tube that acts on the bearing's inner
track
Specific tooling
020265Y Bearing fitting base
Inspecting the crankshaft alignment
With the specific tool shown check that the eccen-
tricity of the surfaces of diam. «A»-«B»-« C» are
within 0.03 mm. (reading limit on the dial gauge);
in addition, check the eccentricity of diam. «D», for
which a maximum reading of 0.02 mm is permitted.
In the case where eccentricity is not much above
prescribed levels, straighten the shaft by acting
on the counterweights with a shim or tighten them
in a clamp (with an aluminium bushing) as re-
quired..
Specific tooling
020335Y Magnetic support for dial gauge
020074Y Support base for checking crankshaft
alignment
Engine
ENG - 91