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Fig. 5-9.
Brake components
,
rear
wheel
l
. Dr ive shaff
2. Brake d isc
3. Cover plale
4. Rear brake
ca
li
per
(due to the ax ial p lay of the
drive shafts
when
driv-
ing round bends or on rough ground ).
The AS.B. de-
vice prevents a red uction in the pedal travel (that is,
the distance from the pedal position
at full
brake app-
lication to the f loor p late). The AS.B. device
consists
of the foUow ing (see
Fig.
5-10)
:
A
spring (3), a washer
(4)
which
ho lds t he
sprin
g
securely
o
n th
e piston
,
a
lso
Fig
.
5-10. Rear brake ca
li
per
l. Sealing ring
10. Venling nippl
e
2.
Pin
11. Boll
3. Spring
12.
Retaining
clip
4. Washer
13.
Brake
pad
5.
Pislon
14.
Inner
half
6. Rubber dusl cover
15.
Damping spring
7.
Relaining ring
16
.
Relaining pin
8. Channel
17.
Space
r
9. Ouler half
5:8
el
pin (2) which is pressed into the caliper. The spring
moves on the pin with a certain amount of friction.
The sealing rings
(1) have
a square section and press
against the
piston
from
the slightly
oblique
groove
in
the
housing.
The function of the
sea
ling
rings is
partly to
prevent brake fluid
from
oozing out and
partly to
return
the pistons
to
the
rest position after
braking.
The rubber
dust
covers
(6)
prevent dirt
from
entering.
The brake pads
(13)
are provided with
bonded facings and are held in position by means of
retaining pins (16).
FUNtCTION
HYDRAULIC
The
lower
cylinders of
the
front wheel brake
units
and the right
rear
wheel brake unit
are connected
through brake lines to the
primary chamber
of the
master
cylinder, see Fig. 5-11.
In
the same
way the
upper
cylinders of the
front
wheel
brake units
and
the
left rear wheel
brake unit
are
co
nnected
to
the
master
cylinder
through the
secondary chamber.
Secondary circuil,
pressure
less
t
Primary circuil,
pressureless
Fig
.
5-11.
Rest position
1. Warning
lamp
VO LVO
10 2897
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