PIAGGIO 633929(IT) Service Station Manual page 106

Engine
- Loosen the tool clamp and insert the belt accord-
ing to its direction of rotation.
- Lock the driven pulley again using the appropri-
ate tool.
- Preload the clutch contrast spring with a traction/
rotation combined action until it reaches the pul-
leys maximum opening and place the belt on the
minimum rolling diameter.
- Remove the driven pulley /belt assembly from the
tool.
N.B.
FOR DESIGN REASONS, THE NUT IS SLIGHT-
LY ASYMMETRIC; THE FLATTEST SURFACE
SHOULD BE MOUNTED IN CONTACT WITH
THE CLUTCH.
N.B.
DURING THE SPRING PRELOADING PHASE,
BE CAREFUL NOT TO DAMAGE THE PLASTIC
SPRING STOP AND THE BUSHING THREAD-
ING.
N.B.
AN EXCESSIVE QUANTITY CAN DAMAGE THE
CLUTCH OPERATION.
Specific tooling
020444Y011 adapter ring
020444Y009 46x55 Wrench
Locking torques (N*m)
Clutch unit nut on driven pulley 55 ÷ 60
Refitting the driven pulley
- Reassemble the clutch bell and spacer.
ENG - 12
MP3 125