Transmission And Brakes; Clutch Grabbing Or Performing Inadequately; Insufficient Braking; Brakes Overheating - PIAGGIO MSS ZIP 100 4T Service Manual

MSS ZIP 100 4T

Transmission and brakes

Possible Cause
Return spring broken
Shoe control bolt not lubricated

Clutch grabbing or performing inadequately

IRREGULAR CLUTCH PERFORMANCE OR SLIPPAGE
Possible Cause
Faulty clutch

Insufficient braking

Possible Cause
Brake pads or shoes worn
Air bubbles inside the hydraulic braking system
Brake disc or drum deformed
Fluid leakage in hydraulic braking system
Excessive backlash in the rear brake control cable
The brake fluid has lost its properties
Possible Cause
Inefficient braking system
Fluid leakage in hydraulic braking system

Brakes overheating

Possible Cause
Defective plunger sliding
Brake disc or drum deformed
REAR BRAKE LEVER FAIL TO RETURN
INEFFICIENT OR NOISY BRAKING
I
NSUFFICIENT BRAKING
BRAKES OVERHEATING
Operation
Replace spring.
Lubricate with Z2 grease.
Operation
Check that there is no grease on the masses. Check that the
clutch mass faying surface with the bell is mainly in the centre
with equivalent characteristics on the three masses. Check that
the clutch casing is not scored or worn in an anomalous way
Operation
Replace the brake pads or shoes and check for brake disk or
drum wear conditions. If the front calliper is removed to facilitate
replacement, remember to replace the copper gaskets located
on the tube joint when refitting; failure to do so may result in
inadequate tightness; it is necessary to bleed the brakes after
this operation.
Carefully bleed the hydraulic braking system, (there must be
no flexible movement of the brake lever).
Use a dial gauge to check the levelness of the disk with the
wheel correctly fitted and the concentricity of the rear drum;
check the brake disc screws are locked
Elastic fittings, piston seals or brake pump breakdown, replace
Adjust backlash with the appropriate adjuster on the shoe con-
trol lever
Replace the front brake fluid and top up to the correct level in
the pump
Operation
Check the pad wear (1.5 min). Check that the brake discs are
not worn, scored or warped. Check the correct level of fluid in
the pumps and change brake fluid if necessary. Check there is
no air in the circuits; if necessary, bleed the air. Check that the
front brake calliper moves in axis with the disc.
Failing elastic fittings, plunger or brake pump seals, replace
Operation
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;
check the brake disc screws are locked
Troubleshooting
TROUBL - 43