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PART
2·2
BRAKE SYSTEM
Section
Page
2·9
Section
1 Description and Operation
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2-9
3
Removal and Installation
Page
2-15
2-21
2 In-Car Adjustments and Repairs
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2-14
4 Major Repair Operations
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a
DESCRIPTION AND OPERATION
Disc brakes are available as op-
tional equipment for the front wheels
on Falcon models but are standard on
Fairmont, Falcon GT, Fairlane 500
Fairlane Custom and all
8 cylinder
and 250 2V 6 cylinder vehicles. The
dual master cylinder equipped hy-
draulic brake system employs single
anchor, internal expanding and self-
adjusting drum brake assemblies on
the rear wheels of vehicles with disc
brakes, and on the front and rear
wheels of all others.
A vacuum booster is used with the
power disc brake system.
DUAL
·MASTER CYLINDER BRAKE
SYSTEM
The dual master cylinder brake
system
has been incorporated in all
models to provide incrersed safety.
The system consists of a dual master
cylinder which incorporates a pres-
sure differential valve
assembly
and
a switch (Fig. 6). The switch on
the differential valve activates a dual-
brake warning light, located on the
instrument panel.
On both disc and drum brake
systems two front brake tubes are
fitted to the two primary brake outlet
ports (rear) on the master cylinder.
The single tube to the rear brakes
is
fitted to the secondary outlet port
(front).
GTONLY.
A
combination
pressure
differential
valve
warning
lamp,
switch and pressure control valve
assembly (proportioning valve) is
fitted
on the suspension tower
immediately
below
the
master
cylinder (Fig. 4).
The original differential pressure
valve, which is integral with the
master cylinder is retained to ensure
the integrity of the dual system;
however, the warning lamp switch is
deleted from the master cylinder and
a sealing plug fitted in its place.
Should
the
original
pressure
differential valve be left out of the
NORIII
. "
.L POSITION
CENTEREO
FIG. 4 -Pressure Differentiafand Pressure
Control Valve and Brake Warning Light
Switch
-
G T Only.
FIG.5
B.A.I.
FIG. 6
Differential
Valve P.B.R.- Typical.
master cylinder, the dual line &afety
feature will be destroyed. as both
systems will be pressurised via a
common chamber.
The
pressure
control
(proportioning) valve
(Fig.
4) is
locat~d
in the rear system
only.
It
provides balanced braking action
between the front (disc) and rear
{drum) brakes. The proportioning
valve reduces pressure at the rear
brakes, since equivalent amounts of
hydraulic pressure would cause more
braking by the self energiSing rear
brakes than the non energising front
disc brakes.
DISC BRAKE
The disc brake .consists of a venti-
lated rotor and caliper assembly. The
caliper used on all models is a single
piston floating caliper (Fig.
7),
and
may be of PBR or Girling design.
FLOATING CALIPER
GIRLING
The caliper assembly is secured to
the spindle with two safety wired
attaching bolts. The upper attaching
bolt is parallel with the centreline of
the vehicle, and the lower bolt is
transverse to the car centreline.
(Fig. 3/8).
The upper ends of the flexible steel
stabilizer are attached to the caliper
housing ears with two caliper locating
pins.
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