Ford Falcon. Manual — part 76
206-06-24 Hydraulic
Brake
Actuation 206-06-24
DISASSEMBLY AND ASSEMBLY
Electronic Throttle Control Module
1. Refer to Section 310-02.
Dual Master Cylinder
Disassembly
Main Bore
Item
Description
Item
Description
16
Primary piston
1
Reservoir cap
17
’O’ Ring
2
Reservoir seal
18
Differential switch assembly
3
Reservoir
19
Proportioning valve assembly
4
Reservoir retaining screw
20
Prop housing sleeve
5
Reservoir seal
21
’O’ Ring
6
Circlip
22
’O’ Ring
7
Fast fill valve
23
End plug
8
’O’ Ring
9
Master cylinder body
1. Clean the outside of the master cylinder and
remove reservoir cap. Pour out and discard any
10
Secondary spring
brake fluid that remains in the cylinder.
11
Secondary piston assembly
2. Unscrew reservoir-to-body retaining screw located
12
Secondary piston stop pin
at base of reservoir.
13
Cup retainer
3. Separate, by hand, the plastic reservoir from the
14
Primary cup
body. Remove the reservoir sealing grommets.
15
Recuperating guide
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206-06-25 Hydraulic
Brake
Actuation 206-06-25
DISASSEMBLY AND ASSEMBLY (Continued)
4. Invert the cylinder so that the reservoir wells face
3. Remove the valve sealing ‘O’ ring from bottom of
down. Depress the primary piston with a rod of
reservoir port. The by-pass bleed groove allows
wood dowel until fully bottomed in the bore. The
fluid to by-pass the ball valve. This ensures that a
secondary piston stop pin should freely fall out; if
fluid passage is maintained between the brake
not, remove with long nose pliers.
pressure circuit and reservoir in the Brakes Off
position.
CAUTION: Slowly return pistons to avoid
primary piston from sringing out of the bore.
5. Carefully remove primary piston assembly from
main bore of master cylinder.
6. Remove secondary piston and return spring by
using compressed air or lightly tapping the open
end of the cylinder bore squarly onto a soft piece
of wood.
7. Separate the secondary return spring from the
secondary piston locating spigot.
NOTE: The caged spring on the secondary piston
has been set to a pre-determined length. DO NOT
attempt to adjust the screw or remove the caged
spring. If cups are damaged or badly worn, the
complete seconary iston assembly MUST BE
Item
Description
REPLACED (as supplied in repair kit).
1
Circlip
8. Remove the seal retainer from the primary piston
2
Fast fill valve
by using a small screwdriver to carefully pry apart
3
O-Ring
the seal retainer legs.
4
Master Cylinder Body
9. Remove the recuperating guide and seal from the
primary piston.
Pressure Differential Switch Assembly (Non ABS
10. Remove the O ring from the other end of the
only)
piston taking EXTREME CARE not to damage the
1. Remove end plug and ‘O’ ring from master
piston.
cylinder body.
Fast-Fill Valve
2. Remove electric switch from master cylinder,
1. Using suitable circlip pliers, remove circlip
ensuring the electrical earthing spring remains on
retaining the fast-fill valve in the primary reservoir
the switch plunger.
port of the master cylinder.
3. Remove the proportioning valve assembly by
2. Face reservoir port down to allow the valve to fall
gently bumping the master cylinder body against
out. If valve is stuck in position, lightly tap cylinder
a piece of wood to dislodge the proportioning
on piece of wood to assist valve removal.
valve assembly. Do not damage the assembly by
attempting to pull it out with pliers.
4. Spring must remain attached to switch plunger.
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206-06-26 Hydraulic
Brake
Actuation 206-06-26
DISASSEMBLY AND ASSEMBLY (Continued)
1. Assemble the large ‘O’ ring onto the end of the
Proportioning Valve (Non ABS only)
primary piston.
DO NOT disassemble the proportioning valve
NOTE: All hardware must be correctly installed
assembly. The valve is serviced only as a complete
and torqued to specification.
assembly.
2. Install primary seal onto the end of the primary
piston, with sealing face away from guide already
assembled. The primary seal can be identified by
the 6 shallow grooves around the seal’s outer
surface.
3. Assemble the cup retaining ring onto the primary
piston. Using a small screwdriver clip the retainer
legs into the groove on the piston. Care should be
taken to avoid damage to the piston or seal.
Secondary Piston
Item
Description
1
End plug
2
’O’ Ring
3
Proportioning valve assembly
4
Master cylinder body
Assembly
1. Extreme care must be taken to avoid damaging
O-Rings when inserting proportioning value.
Item
Description
2. Before assembly, lubricate internal ports and
1
Secondary spring
master cylinder bore with recommended brake
fluid from a sealed container. Prior to assembly,
2
Secondary piston
ensure primary piston (without seals) is free to
move full piston stroke in the large bore.
Primary Piston
Item
Description
1
Master cylinder body
2
Secondary piston stop pin
Item
Description
3
Secondary piston assembly
1
Cup retainer
1. Assemble the small end of the secondary piston
2
Primary cup
spring over the end of the secondary piston. This
3
Recuperating guide
should be a slight interference fit.
4
Primary piston
5
Large ’O’ Ring
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206-06-27 Hydraulic
Brake
Actuation 206-06-27
DISASSEMBLY AND ASSEMBLY (Continued)
2. To assemble the secondary piston assembly into
the body, align the slot in the secondary piston
with the reservoir wells. This must be done so that
the stop pin can be inserted into the master
cylinder body.
Master Cylinder
protrude more than 6 mm above the bottom of the
Item
Description
well.
1
Fast fill valve
2. Insert the primary piston into the main bore and
2
Circlip
against the secondary piston. Then carefully push
3
’O’ Ring - Larger
both pistons down the bore until the primary
piston is flush with the bore opening.
4
Primary piston
3. Stroke pistons and check primary piston fully
5
Split line
returns to end of bore at end of each stroke.
6
’O’ Ring
Ensure movement is not sticky.
7
Primary cup
Differential Warning Switch Section (Non ABS
8
Secondary cup - ’L’ Type
only)
9
Secondary piston
1. Before assembly, lubricate small bore master
1. Carefully insert the secondary piston, (caged
cylinder and proportioning valve with clean brake
spring end last), through the large bore and into
fluid from a sealed container.
the smaller bore until the spring “bottoms”. Ensure 2. Ensure spacer and ‘O’ ring are over proportioning
the secondary spring is not dislodged from the
valve spool, if they were removed, and check that
piston assembly during this operation. Fully stroke
spacer and ‘O’ ring are installed around the right
the secondary piston using a soft dowel and while
way.
held at the bottom of the bore install the piston
stop pin. The piston pin should easily fit in through
the larger hole of the 2 holes in the secondary
reservoir well. The top of the stop pin should not
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