PIAGGIO 633823 Service Station Manual page 100

Engine
- Insert the tool in the hollows and apply the reten-
tion ring
- Bring in the ring's clamping screws while keeping
the tool to support the pulley
Specific tooling
020626Y Driving pulley lock wrench
- Remove the fixing nut and the washer
- Remove the stationary drive pulley half.
Inspecting the rollers case
- Check that the internal bushing shown in the fig-
ure is not abnormally worn and measure inner
diameter A.
- Measure outer diameter B of the pulley sliding
bushing shown in the figure.
- Check that the rollers are not damaged or worn.
- Check the guide shoes for the variator back-plate
are not worn.
- Check the wear of the roller housings and of the
belt contact surfaces on both pulley halves.
- Check that stationary driving pulley does not
show signs of abnormal wear on the grooved edge
and on the surface in contact with the belt.
- Check that the O-ring is not pushed out of shape.
CAUTION
DO NOT LUBRICATE OR CLEAN SINTERED
BUSHINGS
Characteristic
Movable driving half-pulley bushing: Standard
Diameter
ENG - 14
MP3 250 i.e.