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DESCRI PTION
The
164 is
fitted
with two brake
systems
which
are
independent of
each
other. One of these, the
foot-
brake system,
is
control led by a brake pedal and
operates on a
ll
four whee ls
through
a
hydraulic
system. The
other brake
system
,
the handbrake,
f
unc-
t
ion
s
by means of
a
brake
lev
er and operates
both
the
rear
wheels mechanically.
Fig. S-6 shows
the
arrangement of the footbrake
system
whi
ch has d isc
brakes
a
ll
round.
The
hydraulic
part
has two
separate
ci
rcuits. The
master cy linder (l
)
is of
t he tandem -type and each
front whee
l
brake
unit
(13)
has two pairs of cy
li
nders
enti
re ly separated from each another. One of the
circuits serves the
lower
cyl
in
ders of the front wheel
brake units and the right rear whee l, while the other
Vacuum
Primary circuit
pressure above
34
kg/cm
2
(484Ib/s
q.in.}
Primary circuit
,
reduced pressure
circuit lakes care of
the upper
cylinders of the front
wheel brake units
and
the
left
rear wheel. With
such
an arrangement, braking effect is ensured, should
one of the brake
lin
es fai
l.
The servo brake
cylin
der
(S) is
d
i rectly influ
enced
by
the brake
peda
l,
a nd
with
va
cuum ass ista nce
from
the
induction
manifold
of
the
engine less pedal
pressure
is
requ ired for braking. The
function of the
brake valves
(10
and
11)
is
to
ass ist
in providing
a
suitab le d
istribution
of braking
power betwee
n
the
front and rear
wheel
brakes.
Concerning a more deta
il
ed description of
the units
making
up
the
footbrake
and
the handbrake
systems,
see the respective Groups
in
question.
-
Secondary circuit
,
pressure above
34
kg /cm
2
(484Ib/s
q
.in.)
Secondary circuit
,
reduce
d pressure
VO LVO
103
178
1.
Tandem master cylinder
Fig. 5-6
.
Footbrake
syslem
9.
Brake disc
w
ith drum
15. Warning
switch
2. Brake fluid container
1C
.
Brake valve,
16.
Warning
val ve
3.
Vacuum line
secondary
circuit
17.
6-branch
union,
4.
Check valve
11. Brake valve,
(double
3-branch union
)
5.
Servo brake cylinder
primary circuit
18. Brake pipe
6.
Brake switch
12.
Brake pedal
19.
Cover plate
7. Warning lam p
13. Front brake caliper
8.
Rear brake caliper
14. Brake disc
5
:2
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