APRILIA ETV mille, Workshop Manual

Page: 75 / 352

ETV mille
PERIODIC MAINTENANCE AND ADJUSTMENTS
2 - 40 -
00
Release 00/2004 - 04
2.19 BLEEDING THE CLUTCH
Read 0.5.1 (GENERAL PRECAUTIONS AND
INFORMATION) and 1.2.6 (CLUTCH FLUID) carefully.
Bleed the clutch system after the first 1000 km (625 mi) if
needed.
Any air trapped in the hydraulic circuit will act as a
cushion and take up most of the pressure applied by the
master cylinder. This will hamper the operation of the
clutch.
A spongy feel of the clutch lever and impaired clutch
operation mean that there is air in the circuit.
WARNING
Handle with care: contact with clutch fluid will alter
the chemical properties of paintwork, plastic and
rubber parts, etc.
DO NOT RELEASE CLUTCH FLUID INTO THE
ENVIRONMENT.
This is a dangerous condition that makes the vehicle
unsafe to ride. Each time the clutch master cylinder
is removed, it is indispensable to bleed the hydraulic
circuit after refitting the master cylinder, when the
clutch is back to normal operating conditions. Bleed
the clutch as follows:
&
Top up clutch fluid level in the reservoir, see 2.17
(CHECKING AND TOPPING UP CLUTCH FLUID
LEVEL).
&
Remove the rubber cap.
&
Attach a clear plastic hose to the bleed nipple (1).
Insert the other end of the hose into a container.
&
Pump the clutch lever quickly. Repeat several times,
then keep the lever pulled in.
&
Slacken the bleed nipple by one quarter of a turn to let
the clutch fluid drain into the container. This will
remove any tension from the lever and help it travel
fully home.
&
Tighten the bleed nipple (1). Pump the lever
repeatedly, then keep it squeezed in and slacken the
bleed nipple again.
&
Repeat process until the fluid draining into the
container is totally free from air bubbles.
NOTE
During the bleeding procedure, top up reservoir
with clutch 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 (1) and disconnect the bleed
hose.
Torque wrench setting for bleed nipples (1):
9 Nm (0.9 kgm).
&
Add brake fluid to the reservoir until bringing fluid up to
correct level, see 2.17 (CHECKING AND TOPPING
UP CLUTCH FLUID LEVEL).
&
Refit the rubber cap.
1