VESPA 664787 Service Station Manual page 92

Engine
Refitting the crankshaft
- Position the transmission side half crankcase on
- Using a thermal gun, heat the bearing seat to
- Firmly insert the crankshaft until the bearing rea-
ches the end-of-stroke stop
- Let the temperature of the half crankcase settle
at the temperature of the crankshaft.
- Again install the special crankcase separation
plate NOT installing the crankshaft protection
- During the assembly phase keep the central
- Take the four clamping screws to the end of the
stroke and loosen them again with the same angle
- When the temperature has settled, preload the
thrust screw of the tool manually until the ball bear-
ing clearance is cancelled out.
Specific tooling
020163Y Crankcase splitting plate
ENG - 92
two wooden supports
about 120°
thrust screw loose.
(e.g. 90°)
Vespa S 50 2T