PIAGGIO MP3 400 i.e., Руководство по обслуживанию, Страница: 50 / 394

This section makes it possible to find what solutions to apply when troubleshooting.
For each breakdown, a list of the possible causes and respective interventions is given.
Engine
Excessive oil consumption/Exhaust smoke
EXCESSIVE CONSUMPTION
Possible Cause Operation
Wrong valve adjustment Adjust the valve clearance properly
Overheated valves Remove the head and the valves, grind or replace
the valves
Misshapen/worn valve seats Replace the head assembly
Worn cylinder, Worn or broken piston rings Replace the piston cylinder assembly or piston
rings
Worn or broken piston rings or piston rings that
have not been fitted properly
Replace the piston cylinder unit or just the piston
rings
Oil leaks from the couplings or from the gaskets Check and replace the gaskets or restore the cou-
pling seal
Worn valve oil guard Replace the valve oil guard
Worn valve guides Check and replace the head unit if required
Insufficient lubrication pressure
POOR LUBRICATION PRESSURE
Possible Cause Operation
By-Pass remains open Check the By-Pass and replace if required. Care-
fully clean the By-Pass area.
Oil pump with excessive clearance Perform the dimensional checks on the oil pump
components
Oil filter too dirty Replace the cartridge filter
Oil level too low Restore the level adding the recommended oil
type
Transmission and brakes
Clutch grabbing or performing inadequately
IRREGULAR CLUTCH PERFORMANCE OR SLIPPAGE
Possible Cause Operation
Faulty clutch Check that there is no grease on the masses.
Check that the clutch mass contact surface with
the casing is mainly in the centre with equivalent
characteristics on the three masses. Check that
the clutch casing is not scored or worn in an anom-
alous way
Troubleshooting
MP3 400 i.e.
TROUBL - 2