APRILIA Tuono 660 2021 Service Station Manual page 359

RS 660 - Tuono 660
THE FOLLOWING OPERATIONS REFER TO ONE FRONT BRAKE CALLIPER ONLY, BUT ARE
VALID FOR BOTH. THE VEHICLE MUST BE ON LEVEL GROUND TO BE BLED. WHILE PURGING
THE HYDRAULIC SYSTEM, FILL THE RESERVOIR WITH THE NECESSARY QUANTITY OF
BRAKE FLUID. CHECK THAT, DURING THE OPERATION, THERE IS ALWAYS BRAKE FLUID IN
THE RESERVOIR.
•
Remove the rubber protection cover of
the bleed valve.
•
Insert the transparent plastic pipe in
the front brake calliper bleed valve and
slide the other end of this pipe in a con-
tainer to collect the fluid.
•
Remove the front brake fluid reservoir
cap.
•
Quickly press and release the front
brake lever several times and then
keep it fully pressed.
•
Loosen the bleed valve by a 1/4 turn so
that the brake fluid flows into the con-
tainer, this will release the tension on
the brake lever and it which will make
it arrive at the end stop.
•
Close the bleed valve before arriving at
the end of the stroke with the lever.
•
Repeat the operation until the are no
air bubbles in the fluid going into the
container.
NOTE
WHILE BLEEDING THE HYDRAULIC SYSTEM, FILL THE
RESERVOIR WITH THE NECESSARY QUANTITY OF
BRAKE FLUID. CHECK THAT, DURING THE OPERATION,
THERE IS ALWAYS BRAKE FLUID IN THE RESERVOIR.
•
Screw the bleeding valve and remove
the pipe.
•
Top-up the reservoir until the correct
brake fluid level is obtained.
•
Refit and block the front brake oil res-
ervoir cap.
•
Refit the rubber protection cover.
BLEEDING SYSTEM WITH DIAGNOSTIC INSTRUMENT
Braking system
BRAK SYS - 359