Clutch Grabbing Or Performing Inadequately; Insufficient Braking; Brakes Overheating - VESPA ET4 50 Workshop Manual

ET4 50
Possible Cause
The starter remains on
Loose nozzles
Incorrect float level
Transmission and brakes

Clutch grabbing or performing inadequately

IRREGULAR CLUTCH PERFORMANCE OR SLIPPAGE
Possible Cause
Faulty clutch

Insufficient braking

Possible Cause
Worn brake pads or shoes
Air bubbles inside the hydraulic braking system
Brake disc or drum deformed
Fluid leakage in hydraulic braking system
Excessive backlash in rear brake control cable
The brake fluid has lost its properties
Return spring broken
Shoe control bolt not lubricated

Brakes overheating

Possible Cause
Defective sliding of pistons
Brake disc or drum deformed
Electrical system
lenia Air Filter Oil), then hand dry without squeezing, allow to
Check that the starter runs correctly and it is properly powered
Check the maximum and minimum nozzles are adequately
Check and restore the correct fuel level in the tank
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-
INEFFICIENT BRAKING
Replace the brake pads or shoes and check for brake disk or
Carefully bleed the hydraulic braking system, (there must be
Use a dial gauge to check the levelness of the disk with the
wheel correctly fitted and the concentricity of the rear drum;
Elastic fittings, piston seals or brake pump breakdown, replace
Adjust backlash with the appropriate adjuster on the shoe con-
Replace the front brake fluid and top up to the correct level in
BRAKES OVERHEATING
Check calliper and replace any damaged part.
Use a dial gauge to check the levelness of the disk with the
wheel correctly fitted and the concentricity of the rear drum;
Operation
drip dry and then reassemble.
fixed in their fittings
Operation
alous way
Operation
drum wear conditions.
no flexible movement of the brake lever).
check the brake disc screws are locked
trol lever
the pump
Replace spring.
Lubricate with Z2 grease.
Operation
check the brake disc screws are locked
Troubleshooting
TROUBL - 37