Release 00
2003-02
51
Scarabeo 50 I.E.-50/100 4T
Carefully read p. 2 (GENERAL SAFETY RULES), and
p.47 (DISC BRAKES).
NOTE
This vehicle is provided with front and rear disc
brakes, with separate hydraulic system.
The following information may refers to a single braking
system, but is applicable for both braking system.
NOTE
For the version with rear drum brake
, the
following information refers to the front disc brake only.
When air is present in the hydraulic system it will absorb
most of the force exerted by the brake master cylinder,
and thus reduce the effectiveness of caliper action during
braking. You can tell if there is air in the system by
sponginess in the brake control, and reduced braking
efficiency.
Since these conditions would be extremely danger-
ous for the vehicle and for the rider, it is absolutely
necessary to bleed the hydraulic system after the
reassembly of the brakes and the restoration of the
normal conditions of use.
NOTE
To bleed the hydraulic systems one by one.
♦
Carry out the operations described at paragraph
“TOPPING UP”, see p. 48 (section “DISC BRAKE”,
chapter “FRONT AND REAR BRAKE”), excluding the
last five operations.
♦
Remove the protection cap (1) from the bleeder nipple
(2).
♦
Connect a transparent tube (3) to the bleeder nipple
(2).
Do not contaminate the pads or the disc with brake
fluid.
♦
Put the free end of the transparent tube into a clear
container (4).
♦
Slowly pull the brake lever (5) through its full travel two
or three times, then keep it in a fully pulled position.
Loosen the bleeder nipple (2) and check the brake
fluid level in the reservoir (6). Do not allow the
reservoir to become completely empty. This will
cause the introduction of more air into the brake
system.
♦
Loosen the bleeder nipple (2) and check to see if
bubbles still appear in the transparent tube (3) .
Before releasing the brake lever (5), close the bleeder
nipple (2) in order to prevent air from entering the brake
system that way.
♦
When brake fluid flows out clear, without bubbles, this
indicates that you have successfully bled the air from
the brake system. Close the bleeder nipple (2) snugly,
and tighten it to its appropriate tightening torque.
Bleeder nipple tightening torque: 4-12 Nm (2.90-8.68
ftlb).
NOTE
Repeat the last three operations until eliminating
the air bubbles completely.
♦
Replace the protection cap (1) on the bleeder nipple
(2).
♦
Check the brake fluid level, see p. 48 (FRONT AND
REAR BRAKE).
Pay special attention to the brake disc and friction ma-
terial, making sure that they are neither dirty nor oily,
especially after maintenance operations or inspections.
After reassembly, pull the brake lever repeatedly and
check the proper functioning of the braking system.
BLEEDING THE BRAKING SYSTEM
WARNING
WARNING
WARNING
CAUTION
CAUTION
CAUTION
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3
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