Specifications
2-24
GROUP
2-Bra
kes
Snap
Ring
Pliers
/
H1477-B
FIG.
24-Removing Snap Ring-
Typical
19542-A (ESA-M6C25-A) for disc
brake applications, and Rotunda
Brake Fluid
-
Part Number B7AZ-
19542-A, R 103-A or equivalent
for power drum and standard brake
applications.
The brake fluid is col-
ored blue for identification. Do not
mix low temperature brake fluids
with the specified fluid for the power
disc brake system.
8.
Bleed the dual-master cylinder
and the
vrimary and secondaw
brake systems. centralize the pressure
differential valve. Refer to Hydraulic
System Bleeding and Centralizing
of the Differential Valve, Part 2-1,
Section 2 for the proper procedure.
9.
Operate the brakes several
times, then check for external hydraul-
ic leaks.
DUAL MASTER CYLINDER
-
POWER BRAKES
Refer to Figs. 24 and 25.
REMOVAL
1.
Remove the brake tubes from
the primary and secondary outlet
ports of the master cylinder.
2.
Remove the two nuts attaching
the master cylinder to the brake
booster assembly.
3.
Slide the master cylinder forward
and upward from the vehicle.
INSTALLATION
1.
Before installing the master cyl-
inder, check the distance from the outer
end of the booster assembly push rod
to the master cylinder mounting sur-
face. Turn the push rod adjusting
screw in or out as required to obtain
the specified length. Refer to Part 2-1,
Section 2, Power Brake Master Cyl-
inder Push Rod Adjustment for the
proper procedure.
2.
Position the master cylinder
assembly over the booster push rod
and onto the two studs on the booster
assembly.
3.
Install the attaching nuts and
torque them to specifications.
4.
Install the primary (front) and
secondary (rear) brake tubes to the
master cylinder outlet fittings, and
torque them to specification.
5.
Fill the master cylinder with the
specified brake fluid to within
114
to 112 inch of the top of the dual
reservoirs. Use Rotunda Brake Fluid
-
Extra Heavy Duty
-
Part Num-
ber
C6AZ- 19542-A (ESA-M6C25-A)
for disc brake applications, and Ro-
tunda Brake
Fluid
-
Part Number
B7AZ-19542-A, R 103-A or equiv-
alent for power drum and standard
brake applications.
The brake fluid
is colored blue for identification. Do
not mix low temperature brake fluids
with the specified fluid for the disc
brake system.
6.
Bleed the dual-master cylinder
and the primary and secondary
brake systems. Centralize the pres-
sure differential valve. Refer to Hy
draulic System Bleeding and Cen-
tralizing of the Differential Valve,
Part 2-1, Section 2 for the proper
procedure.
7. Operate the brakes several
times, then check for external hydraul-
ic leaks.
PRESSURE DIFFERENTIAL
VALVE
ASSEMBLY
Refer to Figs. 20and 21.
REMOVAL
1.
Disconnect the brake warning
light wire from the pressure differential
valve assembly switch.
To prevent dam-
age to the brake warning switch
wire connector, expand the plastic
lugs to allow removal of the shell-wire
connectorfrom the switch body.
2.
Loosen the tube nut connecting
the primary (front brake) system inlet
tube at the top of the pressure dif-
ferential valve assembly and discon-
nect the tube.
3.
Disconnect the primary system
left front brake outlet tube from the
top side of the pressure differential
valve assembly.
4.
Disconnect the primary system
right front brake outlet tube from
the top side of the differential valve
assembly.
5.
Disconnect the secondary (rear
brake) system inlet tube at the lower
side of the pressure differential valve
assembly.
CALIPER ABUTMENTS
OUTBOARD CALIPER HOUSING
OUST BOOT RETAINING GROOVE
PISTON SEAL
(4)
EXTERNAL
TRANSFER TUBE
SHOE
AN0 LINING ASSEMBLIES
INBOARD CALIPER HOUSING
\
BRIDGE BOLTS
FLEXIBLE
HOSE'
FIG.
25- Caliper Assembly-Disassembled