Disc Brake - Saab V4 Service Manual

Rest position
Braking position s
1
THE BRAKE PISTON IS RETURNED TO REST BY THE
ACTION OF THE PISTON SEAl
movable broke unit is then influenced, so that the outer
friction pod is also pressed the brake disc.
When the piston is being pressed outwards in the
der, a certain resilience occurs in the piston seal which
surrounds the This springiness is sufficient to pull
the piston back when the hydraulic pressure decreases,
thus providing o clearance between the friction pod and
the disc. The outer friction
is
moved back
on account of the movement of the brake assembly
relation to the support bracket. Wear on the brake
IS
for as the brake
moves outwards means of the seal.
500-6
fRONT AXLE ASSEMBLY WITH DISC BRAKE
FROM MODEl 1967
3. Brake
2.
of wear to be
hove become so worn os to necessitate
friction pads, the angle has become so small that the
is practically with the pressure see
I
1 2
NEW AND WORN PADS
1. New
2. Worn
Jan. 1972