Checking And Bleeding The Front And Rear Brake - APRILIA RX 50 - 2002 Manual

CHECKING AND BLEEDING THE FRONT
AND REAR BRAKE (Fig. 16)
The vehicle is provided with a hydraulically controlled
front and rear disc brake. The brake fluid level in the
pump tank must be checked from time to time.
After the first 500 km or whenever an excessive
◆
idle stroke of the lever is found, the hydraulic sys-
tem must be bled to remove any air bubbles that
may have formed.
The bleeding operations for the front and
rear braking system are the same.
Remove the protection cap of the caliper breather
◆
valve (1).
◆ Fit one end of a transparent PVC tube (2) over the
end of the caliper breather valve.
The other end of the tube must be placed in a re-
◆
ceptacle to catch the fluid (3).
Remove the lid of the brake fluid pump and check
◆
that the level is correct. If necessary, top up (see
"LUBRICANT CHART").
Pull the brake lever slowly and completely (2-3
◆
times). Keeping the lever in pulled position, open
the breather valve (1) until fluid and any air bub-
bles can be seen coming out of the tube.
Close the valve again and release the brake lever.
◆
◆ Repeat the operation described above until no
more air bubbles can be seen in the fluid coming
out of the valve.
Tighten the valve and remove the tube, being
◆
careful not to get fluid on the brake pads or the
disc.
Reposition the protection cap, top up the reservoir
◆
to maximum level and close it carefully.
After reassembly, pull the front brake le-
ver repeatedly and check the proper func-
tioning of the braking system.
Brake fluid is corrosive and can cause damage.
Remember: 1 mile = 1.6 km
1 km = 0.625 miles
Fig. 16
21