PIAGGIO 500 cc Service Manual page 226

- Using a thickness gauge check the distance between
the rotors in the position shown in the figure.
Clearance limit allowed: 0.012 mm
- Check the distance between the external rotor and
the pump casing, see figure.
Clearance limit allowed: 0.25 mm
- Check the rotors end play using a ground bar as a
reference plane as shown in the figure.
Value limit allowed: 0.1 mm
Oil pump assembly
- Lubricate the internal rotors.
- Check that the pump cover does not show signs of
wear or scratching.
- On revealing non-conformant values or scratches,
proceed with replacement.
- Assemble the pump cover in the position giving
alignment of the holes for the fixing screws to the
crankcase.
- Block the two fixing screws to the torque prescribed.
Tightening torque:
Oil pump coupling screws 0.7 - 0.9 N·m
Lubrication
05_487
05_488
05_489
10
05_490
10 - 7