Specifications
\
CONVERTIBLE
NU'L
PARKING
ERAKE
CA:
AND
CONDUIT
,
ASSEMBLY-2853
\
,
SPRING-2A651
CAaLE
ASSEMSLY
,
A/
2A604
eRAKE
Y
RETAINER-74277.5
AND
CONDUIT
,
7-10
LB.FT.
\LR~'~AINER-~A~I~
CONVERTIBLE ONLY
H1553-A
FIG.
5-Parking Brake Linkage
Adjustment
-
Comet, Fairlane and
Falcon
r
#16
GAUGE
SHEET STEEL
HIX)8-0
FIG.
6-Push Rod Gauge Dimensions
POWER BRAKE MASTER
CYLINDER PUSH ROD
ADJUSTMENT
The push rod is provided with an
adjustment screw to maintain the cor-
rect relationship between the booster.
control valve plunger and the master
cylinder pistons. Failure to maintain
this relationship will prevent the master
cylinder piston from completely re-
leasing hydraulic pressure and can
cause the brakes to drag, or cause
excessive brake pedal travel.
GROUP
2-Brakes
FIG.
7-Push Rod Adjustment
-
Midland-Ross
To check the adjustment of the
screw, fabricate a gauge of the
dimension shown in Fig. 6. Then place
the gauge against the master cyl-
inder mounting surface of the booster
body as shown in Figs.
7
or
8.
The
push rod screw should be adjusted
so that the end of the screw just touch-
es the inner edge of the slot in the
gauge. Do not set up side forces on
the push rod. Side forces may break
the valve plunger.
This is an approximate adjust-
ment only.
The push rod should not
move more than 0.015 inch as it
contacts the master cylinder piston.
No movement (exact contact) is ideal.
HYDRAULIC SYSTEM BLEEDING
AND CENTRALIZING OF THE
DIFFERENTIAL VALVE
When any part of the hydraulic
system has been disconnected for re-
pair or replacement, air may enter
the system and cause spongy pedal
action. Bleed the hydraulic system
after it has been properly connected,
to be sure that all air is expelled.
MAN
UAL
BLEEDING
The primary and secondary (front
and rear) hydraulic brake systems
are individual systems and are bled
separately. Bleed the longest line
first on
:he individual system being
serviced.
During the complete bleeding
operation, DO NOT allow the reser-
voir to run dry.
Keep the master cyl-
inder reservoirs filled with Rotunda
Fluid
-
Extra Heavy Duty
-
Part
Number
C6AZ- 19542-A (ESA-
M6C25-A).
The
disc brake extra
FIG.
8-Push-Rod Adjustment
-
Bendix
heavy duty brake fluid is colored
blue for identification purposes.
Do
not mix low temperature brake fluids
with the specified fluid during the
bleeding operations. Never re-use
brake fluid which has been drained
from the hydraulic system.
I.
Loosen the bleed screw located
on the side of the master cylinder.
Do
not use the secondary piston stop
screw, located on the bottom of the
master cylinder to bleed the brake
system. Loosening or removing this
screw could result in damage to the
secondary piston or stop screw.
2.
To bleed the secondary (rear)
brake system, position a suitable
318
inch box wrench (Fig. 9) on
the bleeder fitting on the brake wheel
cylinder. Attach a rubber drain
tube to the bleeder fitting.
The end of
the tube should fit snugly around
the bleeder fitting.
3.
Submerge the free end of the
tube in a container, partially filled
with clean brake fluid, and loosen
the bleeder fitting approximately
314
turn.
4.
Push the brake pedal down
slowly through its full travel. Close
the bleeder fitting, then return the
pedal to the fully-released position.
Repeat this operation until air bub-
bles cease to appear at the sub-
merged end of the bleeder tube.
5.
When the fluid is completely
free of air bubbles, close the bleeder
fitting and remove the bleeder tube.
6.
Repeat this procedure at the
brake wheel cylinder on the opposite
side. Ref
ill
the master cylinder reser-
voir after each wheel cylinder is bled