Gilera 633721 Workshop Manual page 311

Nexus 500 euro 3
Overhaul
- Remove the rear brake calliper
- Suitably support the brake calliper in a vice
- Remove the two calliper coupling screws as
shown in the photograph.
- Remove the two plungers from the calliper body
with the aid of short blasts of compressed air
through the brake fluid feed holes.
- Remove the dust ring and the O-ring of each half
calliper.
- Remove the two O-rings in the right half-calliper.
N.B.
WHEN REMOVING THE O-RINGS, BE CAREFUL NOT TO
SCRATCH THE HALF CALLIPER SEATS
- Check that the pistons and their seats show no
scratches.
- Wash and blow all the components carefully.
- Fit new sealing rings and dust guards.
- Refit the plungers in their seats being careful to
lubricate with brake fluid
- Couple the half-calliper and tighten the two screws to the prescribed torque.
N.B.
TO AVOID DAMAGING THE GASKETS, WASH THE PLIERS COMPONENTS ONLY WITH ALCO-
HOL. DO NOT USE FUEL OR DERIVATIVES.
Locking torques (N*m)
Brake calliper coupling 20 - 24
Braking system
BRAK SYS - 311