Brake Fluid Replacement / Air-Bleed - Sym Mio 50 Service Manual

Remove the master cylinder cap and diaphragm.
Add good quality brake fluid and it has to add
same brand brake fluid into the master cylinder.
Clean dirty brake disc.
Caution
The dirty brake lining or disc will reduce the
●
brake performance.
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.

Brake Fluid Replacement / Air-Bleed

Connect drain hose to drain valve.
Open the drain valve on the caliper 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.
Caution
To reuse the spent brake fluid will affect
●
brake performance.
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.
Tightly hold the brake lever and open the drain
1.
valve around 1/4 turns, and then close the
valve.
Caution
Do not release the brake lever before the
drain valve is closed.
Always check the brake fluid level when
carrying out the air bleeding procedure to
avoid air entering into the system.
Slowly release the brake lever, and wait for a
2.
few seconds until it reaches its top position.
Repeat the steps 1 and 2 until there is no air
3.
bubble at the end of the hose. Tightly close the
drain valve.
Make sure the brake fluid is in the UPPER level
4.
of the master cylinder, and refill the fluid if
necessary.
Cover the cap.
5.
To this chapter contents
Master cylinder cap
Transparent draining hose
Diaphragm
Drain valve
13. Brake
Drain valve
Bubble
13-7