1998 JAGUAR X308 ECU

Front Dis
c Brake - Brake PadsVe
hicles With: Standard Brakes
Re
moval and Installation
Remov

al
W
ARNING: BRAKE DUST, IF INHALED CAN DAMAGE YOUR
HEALTH. ALWAYS REMOVE BRAKE DUST USING A VACUUM
BRUSH. DO NOT USE A COMPRESSED-AIR LINE TO DISPERSE BRAKE DUST INTO THE ATMOSPHERE.
CAUTION: Replacement of nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
1. O
pen engine compartment and fit
paint work protection covers
to fenders.
2. Raise front of vehicle and suppo rt on stands. See Section 100-
02.
3. Remove front wheels. See Section 204-04.

4. CAUTI
ON: Remove brake flui
d spillage immediately from
paint work, with clean water.
Loosen brake fluid reservoir-cap.
Position a cloth around the
reservoir to collect any fluid
spillage.

5. CAU
TION: Tie caliper housing aside. Do not allow the
caliper housing to hang on the hydraulic hose, as this will damage
the hose.
Remove caliper housing from caliper carrier.
1. Remove anti-rattle spring.
2. Remove dust covers.
3. Remove guide pins.
Re
move and tie caliper housing aside.

6.
NO
TE: The inner brake pad is fitt
ed with a clip which secures
the pad into the caliper piston.
Remove brake pads from caliper housing.
Discard
brake pads.
7. Clean all mating surfaces and remove brake dust, see
WARNING above.

Rear
Disc Brake - Rear Disc Brake
Description an
d Operation

The brake disc is mounted on the wheel studs and is clamped between the wheel and hub. Cooling ducts run through the
center of the brake disc to provide the required ventilation to keep the disc cool under operating conditions.
The caliper carrier, which is se cured to the hub carrier by two bolts, carries the single-piston caliper housing. The caliper
housing is secured to the caliper carrier by two guide-pins and an anti-rattle spring. When the brakes are applied the
caliper-housing piston pushes th e brake pad in front of it, towards the brake di sc. This movement forces the caliper housing
to move along the guide-pins, in the oppo site direction of the piston, to apply the second brake pad. The brake disc is
therefore gripped between the two pads. As brake pressure is increased the grip on the brake disc is increased to slow-down
the rotation of the road wheel.
The disc brakes requ ire no adjustment.
It
em
Par
t Number
De
scription
1—B

rake Disc
2—Caliper Housin

g
3—Caliper Carrier
4—Brake Pad

s
5—Guide P

ins

6—Du
st Covers
7—An

ti-rattle Spring
8—Du

st Shield
9—Brake Hos

e
10—Bleed Nipp

le

CAUTI O
N: The Brembo caliper is aligned to
the brake disc when it is first installed to the vehicle, therefore, care must
be taken not to disturb this alignment. When removing the ca liper; remove the bolts that secure the anchor bracket to the
hub carrier only. DO NOT loos en any other caliper bolts.
Brembo calipers and discs provide higher -performance braking using the existing hydraulic braking system. The brakes are
installed to the vehicle using unique hub carr iers, hubs, hydraulic hoses and disc shields.
The rear brake disc is a single piece co nstruction which is ventilated and cross-drilled. The disc is mounted on the wheel
studs and is clamped between the wheel and hub. Cooling ducts run through the ce nter of the brake disc to provide the
required ventilation to keep the disc cool under operating conditions.
Modified disc shields are installed to accommodate the larger diameter discs.
Due to the use of fixed calipers in place of the standard floating caliper, certain lateral dimensions on the hub carriers and
hubs are critical to achieve correct cleara nce and operation of the brakes. Therefore special hub carriers and hubs set within
a certain tolerance are inst alled with Brembo brakes.
The four cylinder brake caliper is rigidly attached to the vert ical link via an anchor bracket. The caliper is a split assembly
with each side of the caliper, housing two pistons. The two-pairs of opposed pistons act direct ly on the brake pads mounted
one each side of the disc.
It e
m
Par
t
Number
De
scr
iption
1—Brake D
i
sc
2—Caliper Housin
g
3—Anchor Bracke
t
4—Anchor Bracket to H
u
b Carrier - Bolts
5—Brake Pads


6—Guide Pi

ns
7—An
ti
-rattle Sprin
g
8—Di
sc
Shield
9—Brake Hos
e

10—Bleed Nipp
les

Rear Disc Brake - Brembo

7. Close bleed nipples on
both calipers.
Remove bleed tub

es and containers.
Tigh

ten front bleed nipple to 4-6 Nm.
Tigh

ten rear bleed nipple to 8-11 Nm.

8. Di
sconnect brake hose from
rear caliper housing.
Install plugs to caliper
and brake hose.

9. R
emove caliper housing from caliper carrier.
1. Remove anti-rattle spring.
2. Remove dust covers.
3. Remove guide pins.
4. Remove housing from carrier.
10. NOTE: The inner brake pad is fitt ed with a clip which secures
the pad into the caliper piston.
Remove and discard brake pa ds. (See Caution above).

Rear Disc Brake - Brake CaliperVehicles With: High Performance Brakes
Remo
val and Installation
Remov
a
l
S
p
ecial Tool(s)

Brake Pedal
H
old Tool
JDS 9013
1. WARNING: BRAKE DUST, IF INHALED CAN DAMAGE
YOUR HEALTH. ALWAYS REMOVE BRAKE DUST USING A VACUUM
BRUSH. DO NOT USE A COMPRE SSED-AIR LINE TO DISPERSE
BRAKE DUST INTO THE ATMOSPHERE.
• CAUTIONS:
Replacement of nuts and bolts: Various thread-locking
devices are used on nuts and bolts throughout the vehicle. These
devices restrict the number of ti mes a nut or bolt can be used.
See section 100-00 for information.
Remove brake fluid spillage immediately from paint work,
with clean water.
The Brembo caliper is aligned to the brake disc when it is
first installed to the vehicle, therefore, care must be taken not to
disturb this alignment. When removing the caliper; remove the
bolts that secure the anchor brac ket to the hub carrier only. DO
NOT loosen any other caliper bolts.
Open engine compartment and fit paint work protection covers
to fenders.
2. Raise
vehicle on a four-post lift.
3. Raise front of vehicle and support on stands. Refer to Section
100-02.
4. Remove front wheels. Refe r to operation 74.20.05.

5. NOTE : Th
e following three pictorial procedures must be
carried-out to minimize brake fl uid loss when disconnecting the
brake hose.
Open Left-Hand-Front and Left-H and-Rear caliper bleed nipples.
Connect a
bleed tube and co
ntainer to the calipers.
Op
en bleed nipples.
6. Depress and hold down brak e pedal at the specified
measurement using the special tool.

1
. Position tool between
brake pedal and seat frame.
2. Turn the tool wheel unti l the brake pedal is held
60mm down from its released position.

7. Close bleed nipples on
both calipers.
Tigh

ten bleed nipples to 12-16 Nm.
Remove bleed tub

es and containers.

8. R
elease brake hose from caliper.
R

emove union bolt.
Remove an

d discard
sealing washers.
Inst
all plugs into caliper and hose.

9. Remove brake
pads from caliper.
1. Withdraw pins from caliper.
2. Remove anti-rattle spring.
3. Remove brake pads.
10. CAUTION: Only remove the bolts securing the caliper
anchor bracket to the hub carrier. Refer to caution above for more
information.
Remove caliper from hub carrier.
Re
move bolts.

Rear Disc
Brake - Brake DiscVe
hicles With: Standard Brakes
Remo
val and Installation
Remov
a
l
• WAR
N
INGS:
BRAKE DISCS MUST ALWAYS BE REPLACED IN PAIRS.
BRAKE DUST, IF INHALED CAN DAMAGE YOUR HEALTH. ALWAYS REMOVE BRAKE DUST USING A VACUUM BRUSH.
DO NOT USE A COMPRESSED-AIR LINE TO DI SPERSE BRAKE DUST INTO THE ATMOSPHERE.
CAUTION: Replacement of nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
1. Op
en engine compartment and fit
paint work protection covers
to fenders.
2. Raise rear of vehicle and support on stands. Refer to section
100-02.
3. Remove rear wheels. Refer to section 204-04.

4. CAUTIO
N: Remove brake flui
d spillage immediately from
paint work, with clean water.
Loosen brake fluid reservoir-cap.
Position a cloth around the reser
voir to collect any fluid
spillage.

5. CAUT
ION: Tie caliper housing aside. Do not allow the
caliper housing to hang on the hydraulic hose, as this will
damage the hose.
Remove caliper housing from caliper carrier.
1. Remove anti-rattle spring.
2. Remove dust covers.
3. Remove guide pins.
4. Remove housing from carrier.
Tie
caliper housing aside.
6.
CAUTIO
N: Always install new brake pads, irrespective of
the condition of the original pads, when renewing a brake disc.
• NOTE: The inner brake pad is fitted with a clip which secures
the pad into the caliper piston.

Rear Disc
Brake - Brake DiscVehicl
es With: High Performance Brakes
Remo
val and Installation
Remov
a
l
1.
WAR N
INGS:
BRAKE DISCS MUST ALWAYS BE REPLACED IN PAIRS.
BRAKE DUST, IF INHALED CAN DAMAGE YOUR HEALTH.
ALWAYS REMOVE BRAKE DUST USING A VACUUM BRUSH. DO
NOT USE A COMPRESSED-AIR LINE TO DISPERSE BRAKE DUST
INTO THE ATMOSPHERE.
• CAUTIONS:
Replacement of nuts and bolts: Various thread-locking
devices are used on nuts and bolts throughout the vehicle. These
devices restrict the number of ti mes a nut or bolt can be used.
See section 100-00 for information.
The Brembo caliper is aligned to the brake disc when it is
first installed to the vehicle, therefore, care must be taken not to
disturb this alignment. When removing the caliper; remove the
bolts that secure the anchor brac ket to the hub carrier only. DO
NOT loosen any other caliper bolts.
Open engine compartment and fit paint work protection covers
to fenders.
2. Ra
ise rear of vehicle and support
on stands. Refer to section
100-02.
3. Remove rear wheels. Refer to section 204-04.

4. CAUTIO
N: Remove brake flui
d spillage immediately from
paint work, with clean water.
Loosen brake fluid reservoir-cap.
Position a cloth around the reser
voir to collect any fluid
spillage.
5. CAUTIO
N: Always install new brake pads, irrespective of
the condition of the original pads, when renewing brake discs.
Remove brake pads from caliper. 1. Withdraw pins from caliper.
2. Remove anti-rattle spring.
3. Discard brake pads.