Insufficient Braking; Inefficient Braking System; Brakes Overheating; Heavy Steering - PIAGGIO MP3 400 i.e. Service Manual

MP3 400 i.e.

Insufficient braking

Possible Cause

Inefficient braking system

Fluid leakage in hydraulic braking system
Brake disc slack or distorted

Brakes overheating

Possible Cause
Defective sliding of pistons
Brake disc slack or distorted
Clogged compensation holes on the pump
Swollen or glued rubber gaskets
Steering and suspensions

Heavy steering

Possible Cause
Steering hardening
Excessive steering play
Possible Cause
Torque not conforming
INEFFICIENT BRAKING SYSTEM
brake discs are not worn, scored or warped. Check
the correct level of fluid in the pumps and replace
the circuits; if necessary, bleed the air. Check that
the front brake calliper moves in axis with the disc.
Check the brake disc screws are locked; measure
the axial shift of the disc with a dial gauge and with
BRAKES OVERHEATING
Check the brake disc screws are locked; use a dial
STEERING HARDENING
nuts. If irregularities continue in turning the steer-
check the seats in which the ball bearings rotate:
if they are recessed or if the balls are squashed,
EXCESSIVE STEERING CLEARANCE
nuts. If irregularities continue in turning the steer-
check the seats in which the ball bearings rotate:
Operation
Check the pad wear (1.5 min). Check that the
brake fluid if necessary. Check there is no air in
Failing elastic fittings, plunger or brake pump
seals, replace
wheel mounted on the scooter.
Operation
Check calliper and replace any damaged part.
gauge and a wheel mounted on the vehicle to
measure the axial shift of the disc.
Clean carefully and blast with compressed air
Replace gaskets.
Operation
Check the tightening of the top and bottom ring
ing even after making the above adjustments,
replace them.
Operation
Check the tightening of the top and bottom ring
ing even after making the above adjustments,
Troubleshooting
TROUBL - 3