Page 258 of 1226

206-0614 Hydraulic Brake Actuation 206-06-4
DESCRIPTION AND OPERATION
Function
Item Description
I A I Fascialcrash padding mounting I
Connection point between the latch and
the pedal
1 2 1 Retaining pin (plastic) I
1 3 I Mounting bore I
1 4 1 Mounting for the brake servo actuation rod I
Item Description k
I A I Direction of motion of the latch I
I B I Direction of motion of the pedal I
I 1 I Sheared off retaining pin I
The latch is twisted around the mounting axis of
the pedal, and in the process the retaining pin is
cut through.
The connection point of the brake pedal is
released, and no more force can be transmitted.
The complete pedal unit is mounted via a bore in
The carrier plate ofthe pedal is uncoupled from
the carrier date. the U-shaped pedal and the pedal is left to swing I free.
The U-shaped profile of the brake pedal is held in
position by the latch at a connection point. It
is very important not to damage the retaining pin
when working on the pedal box.
In the event of a severe impact the entire pedal
box is pushed into the
footwell. As the pedal box
is pushed into the footwell, the latch on the upper
side of the brake pedal is pushed against the
mounting of the
fascialcrash padding.
2006.0 Fiesta 1~1200s ~205541 en
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Page 259 of 1226
206-06-5 Hydraulic Brake Actuation 206-06-5
DIAGNOSIS AND TESTING
Hydraulic Brake Actuation
REFER to Section 206-00 [Brake System -
General Information].
2006.0 Fiesta 1212006 GI 7506en
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Page 260 of 1226

206-06-6 Hydraulic Brake Actuation 206-06-6
REMOVAL AND INSTALLATION
Brake Pedal - RHD(12 333 0)
Removal
All vehicles
A WARNING:ln the event of a frontal impact
to a vehicle equipped with a decoupler
brake pedal in which damage to, or
significant movement of, the instrument
panel or the brake booster has occurred,
a new brake pedal must be installed.
Failure to follow this instruction may result
in personal injury.
1. Remove the instrument panel lower panel.
1. Remove the lower retaining screws.
2. Remove the upper retaining screws from the
stowage compartment.
3. Release the clip.
2. Detach the brake booster actuating rod from
the brake pedal (accelerator pedal shown
removed for clarity).
I. Depress the clip.
2. Remove the brake booster actuating rod pin.
Vehicles with manual transaxle 1.
3. N0TE:From 0212004 the brake pedal will not
be equipped with the brake pedal decoupler
mechanism.
Remove the brake pedal.
1. Remove the pivot shaft nut.
2. Slide out the pedal pivot shaft.
3. Remove the brake pedal.
4. Remove the brake pedal bushings. ( ,:
Vehicles with automatic transaxle
5. N0TE:From 0212004 the brake. pedal will not
be equipped with the brake pedal decoupler
mechanism.
Remove the brake pedal.
1. Remove the pivot shaft nut.
2. Slide out the pedal pivot shaft.
2006.0 Fiesta 1212006 G89190en
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Page 261 of 1226
206-06-7 Hydraulic Brake Actuation 206-06-7
REMOVAL AND INSTALLATION
3. Remove the brake pedal.
6. Remove the brake pedal bushings.
Installation
Im ACAUTION:D~ not drop or knock the brake
pedal. Failure to follow this instruction will
cause damage to the brake pedal decoupler
mechanism (if equipped).
To install, reverse the removal procedure.
2006.0 Fiesta 1212006 G89190en
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Page 262 of 1226

206-06-8 Hydraulic Brake Actuation 206-06-8
REMOVAL AND INSTALLATION
Brake Master Cylinder - RHD(12 343 0)
Removal 4. Tighten the bleed nipple. \,
All vehicles
CAUTI0N:lf brake fluid is spilt on the
paintwork, the affected area must be
immediately washed down with cold water.
I. Disconnect the brake vacuum pipe from the
brake booster.
I. Unclip the brake vacuum pipe.
2. Disconnect the brake vacuum pipe.
6. Install the brake fluid reservoir cap.
7m &AUTION:C~~ the brake tubes to prevent
fluid loss or dirt ingress.
Disconnect the brake tubes from the brake
master cylinder.
2. Disconnect the battery ground cable. For
additional information, refer to
Section
414-01 [Battery, Mounting and
Cables].
3. Remove the windshield wiper motor
assembly. For additional information, refer
to Section
501 -1 6 [Wipers and Washers].
4m &AUTION:T~~ brake fluid reservoir cap
must not become contaminated.
Vehicles with anti-lock brakes
Remove the brake fluid reservoir cap.
5. N0TE:lt will be necessary to carry out this 8m &AUTION:C~~ the brake tubes to prevent
fluid loss or dirt ingress.
step on both sides in order to completely
drain the brake fluid reservoir.
Drain the brake fluid reservoir.
1. Connect one end of a suitable piece of clear
plastic pipe to the bleed nipple and place the
other end into a suitable container.
2. Loosen the bleed nipple.
3. Depress the brake pedal until all the fluid is
drained from the brake fluid reservoir.
2006.0 Fiesta 1212006 ~89191 en
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Page 263 of 1226
206-0619 Hydraulic Brake Actuation 206-0619
REMOVAL AND INSTALLATION
Disconnect the brake tubes from the brake 11. Disconnect the low brake fluid warning
master cylinder. indicator switch electrical connector.
I
All vehicles
9m &AUTION:C~~ the clutch master cylinder
feed hose to prevent fluid loss or dirt
ingress.
Disconnect the clutch master cylinder feed
hose from the brake fluid reservoir.
12. Remove the brake master cylinder and
brake fluid reservoir assembly.
Installation
A CAUTI0N:Make sure the brake master
cylinder vacuum seal is correctly
positioned before installation.
I. To install, reverse the removal procedure.
2. Bleed the brake system. For additional
information, refer to Section
206-00 [Brake
System
- General Information].
10. Detach the brake master cylinder from the
brake booster.
2006.0 Fiesta 1212006 G89191 en
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Page 266 of 1226
206-07-2 Power Brake Actuation 206-07-2
SPECIFICATIONS
Torque Specifications
I Brake master cylinder retaining nuts I 25 I 18 I - I
Description
Brake booster retaining nuts
2006.0 Fiesta 1212006 ~28531 en
Nm
25
Ib-ft
18
lb-in
-
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Page 267 of 1226

206-0713 Power Brake Actuation 206-0713
DESCRIPTION AND OPERATION
Brake Booster
Emergency brake assistant (EBA) EBA operates purely mechanically, and is
completely integral with the brakeservo.
As ABS braking systems have become widespread,
it has emerged that because of incorrect use of the
Brake servo units with and without EBA are
brakes, many drivers are losing the safety benefit externally identical. For identification purposes,
which ABS
~rovides. brake servo units with EBA carry a white sticker I showing a large letter "A. Drivers are applying the brakes too timidly.
Because of this, the Anti-lock Braking System The tandem master cylinder
is the same for
(ABS) does not engage, and the maximum braking
vehicles with or without
effect is not achieved.
The EBA recognises from the driver's manner of
braking that an emergency situation is occurring,
and automatically applies full braking power.
This occurs in a matter of milliseconds, which is
faster than the driver could do it.
Furthermore, it was observed that after the first
heavy application of the brake pedal, the driver
releases the pressure on the pedal too early.
The EBA ensures that the ABS effect still continues
when the pedal pressure would normally lie below
the ABS range of control. The system is available
j as an option depending on market and vehicle
variant.
Function
In normal braking situations, the brake servo with
EBA operates in the same way as a conventional
brake servo unit. This means that the driver can
always modulate the brakes.
If an activation threshold defined by a characteristic
curve is exceeded during braking, the EBA
operates.
Determination of the activation threshold is based
on the pedal movement parameters, which are a
function of the pressure on the brake pedal and
the speed of movement of the pedal.
Depending on driving manner, EBA results in a The characteristic curve
is separately defined for
reduction in braking distance of 15% for each vehicle model.
experienced drivers, to over
40% for average The mechanical EBA uses the fact that in a brake
drivers. servo unit, the valve piston moves ahead of the
Because EBA decelerates the vehicle up to the control housing
when a braking operation starts.
wheel locking limit, emergency brake assist is only Because of this, there is a relative travel distance used in vehicles with ABS.
between the control housing and the valve piston
which can vary depending on the force applied to
Components the brake pedal and the pedal speed.
The relative travel distance is small when the pedal
moves slowly with low force applied to it. The
relative travel distance is larger when the pedal
moves faster with higher force applied to it.
Item Description
-
2006.0 Fiesta 1212006 GI 63289en
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