PIAGGIO Beverly 300ie - Service manual > Oil pump

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 control pulley with a screwdriver inserted through one of its two holes.
• Remove the central screw with Belleville washer, as shown in the diagram.
• Remove the chain with the crown.
• Remove the control sprocket wheel with relative 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 ENSURE THAT THE INITIAL DIRECTION OF ROTATION IS MAINTAINED.

Inspection

• Remove the two screws and the oil pump cover.
• Remove the circlip retaining the innermost rotor.
• Remove and wash the rotors thoroughly with petrol and compressed air.
• Reassemble the rotors in the pump body, keeping 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.

  Measure the distance between the outer rotor and the pump body (see figure).

• Check the axial clearance of the rotors using a trued bar as shown in the figure.

Characteristic

Axial rotor clearance
Limit values admitted: 0.09 mm
Distance between the outer rotor and the pump body
Admissible limit clearance: 0.20 mm
Distance between the rotors
Admissible limit clearance: 0.12 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 unit.
• Fit the pump cover in the position that permits the crankcase clamping screws to be aligned.
• Make sure the gasket is positioned properly and refit the pump on the engine crankcase. The pump can only be fitted in one position. - Tighten the screws to the prescribed torque.

• Fit the sprocket wheel with a new O-ring.
• Fit the chain.
• Fit the central screw and the cup washer. Tighten to the prescribed torque.
• Fit the oil pump cover, by tightening the two screws to the prescribed torque.

N.B.

FIT THE CUP WASHER SO THAT ITS OUTER RIM TOUCHES THE PULLEY. MAKE SURE THAT THE PUMP TURNS FREELY.

Locking torques (N*m)
Screws fixing oil pump to the crankcase 5 ÷ 6
Oil pump command sprocket screw 10 to 14
Oil pump cover screws 0.7 - 0.9

Removing the oil sump

• Drain the oil from the sump.
• Remove the seven screws indicated in the figure and the bracket of the rear brake pipes.

• Check the correct position of the three alignment dowels "1" and remove gasket "2", spring and by-pass piston "3".

Inspecting the by-pass valve

• Check the unloaded spring length.
• Check that the small piston is not scored.
• Ensure that it slides freely on the crankcase and that it guarantees a good seal.
• If not, eliminate any impurities or replace defective parts.

Characteristic

By-pass check up: Standard length
54.2 mm

Refitting the oil sump

• Check the correct position of alignment dowels "1".
• Fit a new gasket "2".
• Fit the by-pass piston and spring "3".

• Assemble the oil sump by tightening the seven fixing screws and be careful with the plate indicated.
• Tighten to the specified torque.

Locking torques (N*m)
Oil sump screws 10 to 14

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