Measure the distance between the outer rotor and
the pump body; see figure.
Characteristic
Admissible limit clearance:
0.20 mm
Check the axial clearance of the rotors with a trued
bar as reference, as shown in the figure.
Characteristic
Limit values admitted:
0.09 mm
Refitting
- Check there are no signs of wear on the oil pump
shaft or body.
- Check there are no signs of scoring or wear on
the oil pump cover.
- If you detect non-conforming measurements or
scoring, replace the faulty parts or the assembly.
- Fit the pulley to the pump, the central screw to
the specified torque and the belleville washer.
-Fit the oil pump cover, by tightening the two
screws to the prescribed torque.
N.B.
FIT THE BELLEVILLE WASHER SO THAT ITS OUTER
(CURVED) RIM TOUCHES THE PULLEY.
Locking torques (N*m)
Central screw 12 to 14 Nm Cover screws 0.7 to 0.9
Nm
Vespa LX 125 - 150 i.e. Engine
ENG - 143
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