APRILIA RSV4 RR Service Station Manual page 511

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RSV4 RR/RF
Bleeding the braking system
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 control and by poor braking efficiency.
CAUTION
CONSIDERING THE DANGER FOR VEHICLE AND RIDER, IT IS STRICTLY NECESSARY, AFTER
REFITTING BRAKES AND RESTORING THE BRAKING SYSTEM TO THE REGULAR USE CON-
DITIONS, THAT THE HYDRAULIC CIRCUIT BE AIR PURGED.
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 PURGED. WHILE PURG-
ING 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.
La procedura di spurgo può essere eseguita in modo tradizionale o con l'uso di attrezzi specifici quali
pompe a vuoto o simili. E' importante però procedere spurgando l'impianto nell'ordine che segue:
Pompa freno.
Pinza destra.
Pinza sinistra.
Pompa freno ("rifinitura").
Sotto è riportata la procedura di spurgo "tradizionale".
CAUTION
IN CASO DI SOSTITUZIONE DEL LIQUIDO FRENI, PROCEDERE COME PER UN IMPIANTO TRA-
DIZIONALE SENZA ABS. RICORDARSI PERO' CHE UN COMPLETO RICAMBIO DEL LIQUIDO
FRENI RICHIEDE UNA QUANTITA' MAGGIORE RISPETTO AD UN IMPIANTO TRADIZIONALE.
PER LA POMPA FRENO ANTERIORE SIAMO NELL'ORDINE DI CIRCA TRE SERBATOI MENTRE,
PER IL POSTERIORE SIAMO NELL'ORDINE DI CIRCA DUE SERBATOI.
Remove the rubber protection cover
from 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.
Braking system
BRAK SYS - 511

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