Inspecting The Driven Fixed Half-Pulley; Inspecting The Driven Sliding Half-Pulley; Refitting The Driven Half-Pulley Bearing - PIAGGIO Fly 150 4T Workshop Manual

Engine

Inspecting the driven fixed half-pulley

- Measure the external diameter of the pulley bush-
ing.
Characteristic
Minimum diameter permitted
Ø 40.96 mm
Standard diameter
Ø 40.965 mm

Inspecting the driven sliding half-pulley

- Remove the 2 inner sealing rings and the two O-
rings.
- Measure the inside diameter of the mobile half-
pulley bushing.
Characteristic
Minimum admissible diameter
Ø 41.08 mm
Standard diameter
Ø 41.035 mm

Refitting the driven half-pulley bearing

- Assemble a new roller case using the specific
punch, fit the bearing with the label facing outward
and insert it completely up to the punch on the half-
pulley.
N.B.
REST THE HALF-PULLEY ON A WOOD SUR-
FACE TO AVOID DAMAGING THE THREADED
RINGLET OF THE DRIVEN PULLEY UPON RE-
MOVING IT.
Specific tooling
020424Y Driven pulley roller casing fitting
punch
ENG - 90
Fly 125 - 150 4T