Refitting The Oil Sump; Fuel Supply - PIAGGIO Liberty 50 4tempi 2008 Workshop Manual

Engine

Refitting the oil sump

- Clean and grease the faying surfaces.
- Apply LOCTITE 510 on the sump surface and
tighten the 6 fixing screws to the specified torque.
- Refit the driving pulley assembly, the belt, the
pinion and the transmission cover.
WHEN TESTING THE LUBRICATION SYSTEM, REFER TO
THE "CRANKCASE AND CRANKSHAFT" CHAPTER, RE-
GARDING LUBRICATION OF THE CRANKSHAFT AND
CONNECTING ROD
Locking torques (N*m)
Oil sump screws
8 to 10 Nm

Fuel supply

- Disconnect the fuel supply and the suction taking
pipe from the carburettor.
- Check that there are no fuel leaks between the
two tubes.
- Close the fuel outlet pipe.
- By means of the MITYVAC pump apply 0.1 bar
of suction to the tap.
- Make sure that the suction is kept stable and that
and that there are no fuel leaks.
- Reconnect the vacuum pipe to the manifold.
- Position the fuel pipe with the outlet at the point
of the tap.
- Turn the engine by using the starter motor for five
seconds with the carburettor at minimum.
- Take up the fuel by means of a graded burette.
N.B.
THE MEASUREMENT MAY BE FALSIFIED BY THE INCOR-
RECT NUMBER OF REVS OR BY THE WRONG POSITION
OF THE TUBE. IN THIS CASE, THE TENDENCY IS TO OB-
TAIN A REDUCED FUEL FLOW RATE. THE SUCTION OUT-
LET ON THE MANIFOLD HAS A SECTION INTENTIONALLY
REDUCED FOR THE PURPOSE OF ENHANCING THE SUC-
TION PULSATION AND THEREBY GUARANTEE A CON-
STANT TAP FLOW RATE.
Specific tooling
020329Y Mity-Vac vacuum-operated pump
Characteristic
Minimum flow rate
ENG - 114
Liberty 50 4tempi