- Remove the central screw with Belleville washer,
as shown in the diagram.
- Remove the chain with the pulley.
- Remove the crankshaft control pinion.
- Remove the oil pump acting on the 2 retainers as
shown in the figure.
- Remove the oil pump seal.
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 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.
- Using a feeler gauge, check the distance be-
tween the rotors in the position shown in the figure.
Characteristic
Maximum clearance admitted
0.12 mm
Engine Vespa LX 125 - 150 i.e.
ENG - 142
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