Inspecting The Rollers Case - PIAGGIO 633929(IT) Service Station Manual

Engine

Inspecting the rollers case

- Check that the internal bushing shown in the fig-
ure is not abnormally worn and measure inner
diameter A.
- Measure the pulley sliding bushing outside di-
ameter 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
Roller: Minimum diameter permitted
Ø 18.5 mm
Sliding bushing: Minimum admissible diame-
ter
Ø 25.95 mm
Movable driving half-pulley bushing: Maxi-
mum allowable diameter
Ø 26.12 mm
Roller: Standard Diameter
Ø 18.9 ÷ 19.1 mm
Sliding bushing: Standard Diameter
Ø 25.959 ÷ 25.98 mm
Movable driving half-pulley bushing: Standard
Diameter
26.000 - 26.021 mm
ENG - 14
MP3 125