MOTO GUZZI V85 TT Service Station Manual page 184

Braking system
FRONT
•
With diagnostics instrument properly connected, select the function "FRONT BRAKE
BLEEDING PROCEDURE".
•
The pump starts rotating.
•
While the pump is performing a rotation cycle, operate and release the front brake lever until
the message diagnostics instrument cycle completion is received.
•
This procedure allows the air to turn and to accumulate.
•
Once the procedure with diagnostics instrument is finished, perform the REGULAR BLEED-
ING to remove the air from the system completely.
CAUTION
PERFORM THE STANDARD BRAKING SYSTEM BLEEDING PROCEDURE, AS DESCRIBED AT
THE END OF THE CHAPTER.
Front
Any air trapped in the hydraulic circuit acts as a cushion, absorbing much of the pressure applied by
the brake pump and minimising the braking power of the calliper.
The presence of air is signalled by the "sponginess" of the brake and by poor braking.
IN VIEW OF THE DANGER THIS POSES FOR VEHICLE AND RIDER, THE HYDRAULIC CIRCUIT
MUST BE BLED AFTER REFITTING THE BRAKES AND RESTORING THE BRAKING SYSTEM TO
ITS NORMAL OPERATING CONDITIONS.
NOTE
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 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.
•
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-
BRAK SYS - 184
V85 TT