PIAGGIO NRG Power DT Workshop Manual page 112

Braking system
Front
-Once the bleed valve is closed, fill the system with
brake liquid to the maximum level.
-Undo the bleed screw.
-Apply the tube of the special tool to the bleed
screws.
When bleeding it is necessary to fill the oil tank in
continuation while working with a MITYVAC pump
on the bleed screws until no more air comes out of
the system.
The operation is finished when just oil comes out
of the bleed screws.
-Do up the bleed screw.
-When the operation is over, tighten up the oil
bleed screw to the prescribed torque.
N.B.
IF AIR CONTINUES TO COME OUT DURING
PURGING, EXAMINE ALL THE FITTINGS:
IF SAID FITTINGS DO NOT SHOW SIGNS OF
BEING FAULTY, LOOK FOR THE AIR INPUT
AMONG THE VARIOUS SEALS ON THE PUMP
AND CALLIPER PISTONS.
CAUTION
- DURING THE OPERATIONS, THE VEHICLE
MUST BE ON THE STAND AND LEVEL.
N.B.
DURING PURGING FREQUENTLY CHECK THE
LEVEL TO PREVENT AIR GETTING INTO THE
SYSTEM THROUGH THE PUMP.
WARNING
- BRAKING CIRCUIT FLUID IS HYGROSCOPIC.
IT ABSORBS HUMIDITY FROM THE SUR-
ROUNDING AIR.
IF THE LEVEL OF HUMIDITY IN THE BRAKING
FLUID EXCEEDS A GIVEN VALUE, BRAKING
EFFICIENCY WILL BE REDUCED.
THEREFORE, ALWAYS USE FLUID FROM
SEALED CONTAINERS.
UNDER NORMAL DRIVING AND CLIMATIC
CONDITIONS YOU SHOULD CHANGE THIS
LIQUID EVERY TWO YEARS.
IF THE BRAKES ARE USED INTENSELY AND/
OR IN HARSH CONDITIONS, CHANGE THE
FLUID MORE FREQUENTLY.
CAUTION
WHEN CARRYING OUT THE OPERATION,
BRAKE FLUID MAY LEAK FROM BETWEEN
BRAK SYS - 6
NRG Power DT