This section makes it possible to find the solutions to use in troubleshooting.
For each breakdown, a list of the possible causes and respective interventions is given.
Engine
Poor performance
POOR PERFORMANCE
Possible Cause
Operation
Fuel nozzles or cock clogged or dirty
Dismantle, wash with solvent and dry with compressed air
Excess of encrustations in the combustion chamber
Remove the encrustations
Lack of compression wear of the piston rings or cylinder
Check the worn parts and replace them
Exhaust pipe clogged due to excessive encrustations
Replace the exhaust pipe and check the carburation and mixer
timer
Air filter blocked or dirty
Clean according to the procedure
Starter inefficient (stays on)
Check the mechanical sliding, continuity of the circuit, the pres-
ence of power and electrical wiring
Clutch slipping
Check the centrifugal brake shoe assembly and /or clutch bell
and replace if necessary
Defective mobile pulley sliding
Check the parts, change the faulty parts and lubricate the driv-
en pulley using only Montblanc-Molibdenum Grease (dis.
498345) grease
Driving belt worn
Replace
Carburettor nozzles clogged
Dismantle, wash with solvent and dry with compressed air
Fuel filter on vacuum operated cock blocked
Clean the cock filter
Roller wear; Presence of oil; Dirt
Check the cap with filter is fitted to the transmission cover;
clean the speed variator, replace the rollers if worn out
Rear wheel spins at idle
REAR WHEEL
Possible Cause
Operation
Idling rpm too high
Check the idling speed and, if necessary, adjust the C.O.
Clutch fault
Check the spring/friction mass and the clutch bell
Air filter housing not sealed
Correctly refit the filter housing and replace it if it is damaged
Starting difficulties
DIFFICULTY STARTING
Possible Cause
Operation
Carburettor nozzles clogged or dirty
Dismantle, wash with solvent and dry with compressed air
Faulty fuel cock
Check that, at ignition and with throttle untwisted, no petrol
flows out the delivery pipe; otherwise, replace the vacuum-op-
erated cock
Starter inefficient
Check: electric wiring, circuit continuity, mechanical sliding and
power supply
Defective spark plug or with incorrect electrode gap
Check and if necessary replace the spark plug and the elec-
trode gap
Battery flat
Check the state of the battery. If it shows signs of sulphation
replace it and bring the new battery into service charging it for
eight hours at a current of 1/10 of the capacity of the battery
itself
- Engine flooded.
Start the vehicle keeping the throttle fully open alternately mak-
ing the engine run for approx. five seconds and stopping for
other five seconds. If however it does not start, remove the
spark plug, the engine over with the throttle open being careful
Vespa LX 50
Troubleshooting
TROUBL - 39
Содержание LX 50
Страница 1: ...WORKSHOP MANUAL 633416 Vespa LX 50 ...
Страница 4: ......
Страница 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Страница 16: ...INDEX OF TOPICS TOOLING TOOL ...
Страница 27: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Страница 38: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Страница 44: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Страница 58: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Страница 60: ...INDEX OF TOPICS ENGINE ENG ...
Страница 91: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Страница 107: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Страница 113: ...INDEX OF TOPICS CHASSIS CHAS ...
Страница 118: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Страница 122: ...INDEX OF TOPICS TIME TIME ...
Страница 124: ...Crankcase CRANKCASE Code Action Duration 1 001133 Engine crankcase Replacement Time Vespa LX 50 TIME 124 ...