15. Brake System
15-5
Hydraulic Disk Brake
z Close the drain valve of the hydraulic
disc brake.
z Replace the brake fluid.
Before the brake fluid reservoir is removed, turn
the handle so that the brake fluid reservoir
becomes horizontal, then remove the brake fluid
reservoir.
Cover the painted surfaces, plastic or rubber
components with a rag when servicing brake
system.
CAUTION
Remove the master cylinder cap and diaphragm.
Use high quality brake solvent to clean the dirty
brake disc.
CAUTION
Refill up same brand brake fluid into the
reservoir.
CAUTION
Connect drain hose to drain valve.
Open the drain valve on the calliper and hold
and release the brake lever alternatively until the
old brake fluid is entirely drained out.
Close the drain valve and add specified brake
fluid into the brake master cylinder.
Recommended brake fluid: WELLRUN
DOT 3 brake fluid
CAUTION
Connect one end of transparent hose to the
drain valve, and put the other end into a
container.
Open the drain valve around 1/4 turns, and at
the same time hold the brake lever until the
there is no air bubble in the drain hose and also
feeling resistance on the brake lever.
Close the drain valve when finishing the brake
system refilling fluid procedure, and operate the
brake lever to check whether air bubble is in
brake system or not. If brake is still soft, please
bleed the system as described below.
Spilled brake fluid on painted surfaces,
plastic or rubber components may result in
their dama
es.
The dirty brake lining or disc will reduce the
brake performance.
To reuse the spent brake fluid will effect
brake performance.
Drain hose
Air bubble
Drain valve
Master cylinder
Cap
Plate
Diaphragm
Lower
level
Upper
level
The mixed non-compatible brake fluid will
reduce brake performance. Foreign materials
will block the system causing brake
performance to be reduced or totally lost.
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