Inspecting The Driven Sliding Half-Pulley; Refitting The Driven Half-Pulley Bearing - PIAGGIO MP3 400 i.e. Service Manual

Engine

Inspecting the driven sliding half-pulley

- Check that the belt contact surface is free from
wear.
- Remove the 2 inside sealing rings and the 2 out-
side O-rings.
- Measure the movable half-pulley bushing inside
diameter.
Characteristic
Maximum admissible diameter:
50.08 mm
Standard diameter:
50.085 mm

Refitting the driven half-pulley bearing

- Install a new roller bearing using the special tool.
N.B.
PLACE THE BEARING WITH THE WRITINGS AND THE EMBEDDED OIL GUARD FACING OUT-
WARDS.
- Properly support the half-pulley to prevent damaging the threading.
If you are working on the driven pulley unit fully assembled, use the special tool.
Specific tooling
020478Y Punch for driven pulley roller casing
001467Y002 Driver for OD 73 mm bearing
- Install a new ball bearing using the special tool.
Specific tooling
020376Y Adaptor handle
020477Y Adaptor 37 mm
020363Y 20 mm guide
- Insert the seeger lock ring.
ENG - 10
MP3 400 i.e.