APRILIA ETV mille, Workshop Manual

Page: 71 / 352

ETV mille
PERIODIC MAINTENANCE AND ADJUSTMENTS
2 - 36 -
00
Release 00/2004 - 04
HOW TO BLEED THE BRAKING SYSTEM
There are three bleeding procedures to be performed
strictly in the order given:
1
st
√ BLEED THE HYDRAULIC CIRCUIT
NOTE
Read the description of the hydraulic circuit
bleeding procedure for instructions on how to determine
whether the brake caliper and the master cylinder need
bleeding, too.
2
nd
√ BLEED THE BRAKE CALIPER
3
rd
√ BLEED THE MASTER CYLINDER.
WARNING
The three bleeding procedures must always be
performed in the specified order.
REQUIREMENTS
Before proceeding, ensure the following requirements
are met:
NOTE
Place the motorcycle on firm and level ground
and put it on the side stand.
A the master cylinder is above the oil tube (meaning the
total length of the hose) and the brake caliper (C);
B the brake fluid reservoir is above the master cylinder
(A);
C the caliper bleed nipple (1-2) is on top of the caliper;
D the oil tube is routed smoothly with no upside-down U-
turns.
NOTE
In order to bleed the rear braking system, you
will first have to remove the rear brake caliper, see 7.8.1
(REMOVING THE REAR SWINGING ARM).
&
Top up brake fluid level in the reservoir, see 2.15
(CHECKING AND TOPPING UP FRONT BRAKE
FLUID LEVEL) and see 2.16 (CHECKING AND
TOPPING UP REAR BRAKE FLUID LEVEL).
&
Remove the rubber cap.
&
Attach a clear plastic hose to the caliper bleed nipples
(1-2). Insert the other end of the hose into a container.
&
Pump the brake lever quickly. Repeat several times,
then keep the lever pulled in.
&
Slacken the bleed nipple by one quarter of a turn to let
the brake fluid drain into the container. This will remove
any tension from the lever and help it travel fully home.
&
Tighten the bleed nipple. Pump the lever repeatedly,
then hold in the lever and slacken the bleed nipple
again.
&
Repeat process until the fluid draining into the
container is totally clear of air bubbles.
NOTE
During the bleeding procedure, top up reservoir
with brake fluid up to Max level if needed. The reservoir
should not be empty during the bleeding procedure or air
will enter the system.
&
Tighten the bleed nipple and disconnect the hose.
Torque wrench setting for bleed nipples (1):
9 Nm (0.9 kgm).
Torque wrench setting for bleed nipple (2):
14 Nm (1.4 kgm).
A
C C
D
B
A
C
1
C
1
C
2
CC