VESPA GTV 250 i.e. 2008 Service Station Manual page 150

Engine
Removal
- Undo the two clamping screws in the figure and
remove the cover over the pump control sprocket.
- Block the rotation of the oil pump driving pulley
by inserting a screwdriver through one of its holes
- Remove the central screw with cup washer, as
shown in the diagram.
- Remove the chain with the sprocket.
- Remove the control sprocket wheel and its O-
ring.
- Remove the oil pump by undoing the two screws
in the figure.
- Remove the oil pump seal.
N.B.
IT IS ADVISABLE TO MARK THE CHAIN IN ORDER TO EN-
SURE THAT THE INITIAL DIRECTION OF ROTATION IS
MAINTAINED
Inspection
- Remove the two screws and the oil pump cover.
- Remove the cir-clip retaining the innermost rotor.
- Remove and wash the rotors thoroughly with pet-
rol and compressed air.
- Reassemble the rotors in the pump body, keep-
ing the two reference marks visible. Replace the
retainer ring.
- Check the clearance between the rotors in the
position shown in the diagram using a feeler gauge
ENG - 150
Vespa GTV 250 i.e.