Derbi GP1 50 cc, Руководство по ремонту, Страница: 134 / 138

133
CAUSES POSSIBLE WORK
Insufficient braking force The rear brake (drum brake) is adjusted by setting the
relative registers (on the wheel), remembering that the
wheels must turn freely when the brake levers are fully
released.
The braking action should start when brake levers are
pulled at 1/3 of their travel.
Check wear of brake pads. If there are problems that
cannot be overcome simply by normal adjustment of
the control linkages, proceed to inspect the pads and
front brake disc, the shoes and the rear drum.
If surfaces are excessively worn or scored, replace the
affected parts as necessary.
INSUFFICIENT BRAKING
B
RAKING SYSTEM FAILURE
Air bubbles in the braking hydraulic system Carefully bleed the hydraulic system (spring action of
the brake lever should not be felt)
Fluid leakage Spring connections, piston gaskets or brake pump fa-
ilure. Replace
Worn fluid Change the front brake fluid and restore correct level
in the pump
Cables not sliding properly in sheaths Lubricate or replace
Noisy brake Check pads and/or shoes wear
CAUSES POSSIBLE
WORK
Defective piston sliding
Brake disc or drum deformed
Check the caliper and replace any damaged parts
Check by means of a dial gauge the disc levelness with
the wheel correctly mounted, or concentricity of the
rear drum
B
RAKES OVERHEATING