1998 JAGUAR X308 rear pads

Are th
ere any external brake system leaks?
Yes REPAIR as necessary. ADD fluid and BLEED the brak e system. For additional information, refer to
General Procedures in this section. TEST the system for normal operation.
No GO to F3
.
F
3: CARRY OUT A BRAKE MASTER CYLINDER BYPASS TEST
Te

st for brake master cylinder bypass condition. Re
fer to Brake Master Cylinder Component Test in
this section.
1
A
re any concerns found?
Yes INSTALL a new brake master cylinder, ADD flui d and BLEED the brake system. For additional
information, refer to General Proc edures in this section. TEST the system for normal operation.
No System is OK.
PINPO
INT TEST G : EXCESSIVE BRAKE PEDAL EFFORT
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
G1

: CHECK BRAKE PADS
Check the brake pads for wear, contamin

atio
n, correct installation, damage and type.
1
A
re any concerns found?
Yes INSTALL the front brake pads correctly or INSTALL ne w front brake pads if necessary. For additional
information, refer toSection 206
-03
Front Disc Brake
. INSTALL the
rear brake pads correctly or
INSTALL new rear brake pads if necessary. For additional information, refer toSection 206
-04
Rear
Di

sc Brake
. REPEAT road test.
No

GO to G2
.
G2:
CHECK VACUUM
Di

sconnect the vacuum booster hose from the booster.
1
Conne

ct a vacuum/pressure tester to the vacuum hose.
2
Ru

n the engine at normal operating temperature.
3
Re

cord the vacuum reading.
4
Is

the reading 40.5kPa (1
2 in-Hg) or greater?
Yes GO to G3
.
No

LOCATE and REPAIR the source of low vacuum . TEST the system for normal operation.
G3
: INSPECT SYSTEM
Swi

tch the engine off.
1
Re

connect the vacuum hose.
2
Inspect th

e brake booster, rubber grommet, and al
l vacuum plumbing for cracks, holes, damaged
connections, or missing clamps.
3
Pump th
e brake pedal several time
s to exhaust the vacuum. Push down on the brake pedal and hold.
4
Does th
e brake pedal move down
when the engine is started?
Yes Vacuum system is OK.
No GO to G4
.
G4
: CHECK POWER BRAKE BOOSTER VALVE
Check the brake booster valve. For
add
itional information, refer to
Brake Booster in this section.
1
Is th
e power brake booster valve OK?
Yes CHECK the brake booster. Fo r additional information, refer to Brak e Booster in this section. INSTALL a
new brake booster if necessary. TEST the system for normal operation.
No INSTALL a new brake booster valve. TEST the system for normal operation.
P
INPOINT TEST H : BRAKE LOCKUP
DURING LIGHT BRAKE PEDAL FORCE
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
H1

: TEST BRAKE LOCKUP

Road test the veh
icle and a
pply the brake pe dal lightly.
1
Do th
e brakes lockup?
Yes GO to H2
.
No
Vehicle is OK.
H2: INSPECT BRAKE PADS
Inspect brake pads for con
t
amination,
correct installation , damage and type.
1
Ar
e any concerns found?
Yes CHECK the front brake pads. For additi onal information, refer toSection 206
-03 Fr
ont Disc Brake
.
CHECK
the rear brake pads. For additi
onal information, refer toSection 206
-04
Rear Disc Brake
.
INST ALL new brake pads as ne ce
ssary. REPEAT
road test.
No GO to H3
.
H3: INSPECT BRAKE CALI
PERS
Inspect brake cali
pers for bindi
ng, leaking or sticking.
1
A
r
e any concerns found?
Yes CHECK the front brake calipers. For addi tional information, refer toSection 206
-03 Fr
ont Disc Brake
.
CHECK
the rear brake calipers. For addi
tional information, refer toSection 206
-04
Rear Disc Brake
.
IN ST
ALL the brake calipers correctly or INSTALL new
brake calipers as necessary. TEST the system for
normal operation. REPEAT road test if necessary.
No Vehicle is OK.
PI
NPOINT TEST I : BRAKES DRAG
TE
S
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
I1
:
ROAD TEST VEHICLE
Ro
ad t
est the vehicle
and apply the brakes.
1
Are the brakes
functioning correctly?
Yes Vehicle is OK.
No GO to I2
.
I2
: CHECK CALIPERS
Check the fr
on
t caliper pistons for binding, leakin
g or sticking. For additional information, refer
toSection 206
-03 Fr
ont Disc Brake
. Check the rear cal
i
per pistons for
binding, leaking or sticking. For
additional information, refer toSection 206
-04
Rear Disc Brake
.
1
Do t
h
e disc brake caliper pistons
and pins bind, leak or stick?
Yes INSPECT the brake calipers and pa rking brake cables. INSTALL new co mponents as necessary. Road
test vehicle.
No GO to I3
.
I3
: CHECK BRAKE BOOSTER
Check the brake booster con
n
ecting rod alignment
and travel. For additional information, refer
toSection 206
-0 7
Power Brake Actuation
. 1
Is the co
nnecti
ng rod OK?
Yes Vehicle is OK.
No INSTALL a new brake booster. For addi tional information, refer toSection 206
-07
Power Brake
Actuation. TEST
the system for
normal operation.
PINPO
I
NT TEST J : EXCESSIVE/ERRATIC BRAKE PEDAL TRAVEL
TE
S
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
J
1
: TEST ON ROUGH ROAD
R
oad test the vehi
cle on rough road conditions.
1
Apply the brakes slowly. 2
Is th
e brake pedal ef
fort an
d brake pedal travel normal?

Front Disc Brake - Brake CaliperVehicles
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.
• CAUTIONS:
Replacement of nuts and bolts: Various thread-locking de vices 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.
Remove brake fluid spilla ge immediately from paint work, with clean water.
A new brake hose must be installe d when replacing a brake caliper.
The brake pad adhesive backing must not be reused, therefore always install new brake pads, irrespective of the
condition of the original pads when replacing a brake caliper. Always replace brake pads as an axle set.
S
pecial Tool(s)

Brake Pedal

Hold Tool
JDS 9013
1. O
pen 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. See Section 204-04.

5. NOTE
: The 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.
O
pen bleed nipples.
6. Depress and hold down brak e pedal at the specified
measurement using special tool.
1. Position tool between brake pedal and seat frame.
2. Turn the tool wheel unti l the brake pedal is held

In
stallation

6.
Clean all mating su rfaces and remove brake du
st, see
WARNING above.
7. Repeat above procedure to remo ve opposite side brake pads.

1. CAUTIO
N: Make sure grease does not contact brake-pad
friction surface or brake disc.
To prevent brake squeal apply grease to the shoulders of the
brake-pad backplate.
For additional information, refer to: Specifications
(206-0
4 Rear
Disc Brake, Specifications).
Apply a un iform
layer of grea
se to backplate shoulders,
making sure the whole sh oulder is covered.

2. CAUTIO
N: Make sure the brake pads are fitted with the
direction arrow following the direction of wheel rotation.
Make sure the brake pads are fi tted with the direction arrow
following the direction of wheel rotation.

3. CAUTI O
NS:
Retracting the caliper piston may cause the fluid reservoir
to over-flow. Remove brake flui d spillage immediately from paint
work, with clean water.
Make sure the brake pads are installed to the correct
orientation.
Make sure the brake pads ar e fitted with the direction
arrow following the direction of wheel rotation.
Note condition of pins an d 'R' clips and replace if
necessary.

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

Rear Disc Brake - Brake CaliperVehicles W
ith: Standard Brakes
Re
mo
val and Installation
Remov
a
l
WA
RNING: 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 de vices 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.
Remove brake fluid spilla ge immediately from paint work, with clean water.
The brake pad adhesive backing must not be reused, therefore always install new brake pads, irrespective of the
condition of the original pads when replacing a brake caliper. Always replace brake pads as an axle set.
Sp
ecial Tool(s)

Brake Pedal
H
old Tool
JDS 9013
1. Op
en luggage compartment lid and fit suitable paintwork
protection equipment.
2. Raise vehicle on a four-post lift.
3. Raise rear of vehicl e and support on stan ds. See Section 100-
02.
4. Remove rear wheel. See Section 204-04.

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.

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.