PIAGGIO MSS X9 EVOLUTION 250 - Inspecting the driven sliding half-pulley

Inspecting the driven sliding half-pulley
- Remove the two internal grommets and the two
O-rings.
- Measure the movable half-pulley bushing inside
diameter.
- Check the contact surface with the belt to make
sure there are no flaws.
- Check the riveted joints are functional.
- Check the evenness of the belt faying surface.
MOVABLE DRIVEN HALF-PULLEY DIMENSIONS
Specification
Desc./Quantity
Wear limit 0.3 mm
standard diameter Diameter 41.000 - 41.035 mm
maximum allowable diameter Ø 41.08 mm
- Remove the belt and slide the movable half-pulley with the relevant bush, taking care of the falling
free assembled rollers.
- Remove the return rollers plate with the relative guide pads.
Refitting the driven half-pulley bearing
- Support the pulley bushing adequately from the
threaded side using a wooden surface.
- Fit a new roller sleeve as in the figure.
- For the fitting of the new ball bearing, follow the
example in the figure using a modular punch.
Fit the snap ring
WARNING
N.B.
FIT THE BALL BEARING WITH THE VISIBLE SHIELD
Specific tooling
Engine MSS X9 Evolution 250
ENG - 88