Gilera 633721 Workshop Manual page 325

Nexus 500 euro 3
Removal
Replace the pressure distribution valve
If problems are discovered in the brake force dis-
tribution between the front left brake calliper and
the rear brake calliper (e.g. equal surface contact
and braking of both the wheels, the rear brake en-
gages but the front brake does not operate or vice
versa, or the brakes function in completely differ-
ent modes, or the distribution valve does not func-
tion correctly), proceed as described below:
- Bleed the brakes of the combined system.
- Remove the front knee guard.
- Loosen fitting 1 shown in the figure for the rear
brake calliper.
N.B.
INSERT A CLOTH UNDER THE DISTRIBUTION VALVE TO
AVOID BRAKE FLUID DRIPPING ONTO THE PLASTIC OR
OTHER COMPONENTS OF THE SCOOTER.
- Remove fitting 2 of the front brake calliper.
- Remove fluid inlet fitting 3 from the pump to the
valve.
- Remove the 2 TCEI socket head retaining screws
of the holding the valve to the frame in the 2 bores
shown in the figure.
- Remove the valve and replace with a new valve.
Refitting
To refit carry out the disassembly steps but in re-
verse order.
N.B.
USE NEW COPPER GASKETS ON THE JOINTS.
Braking system
BRAK SYS - 325