1998 JAGUAR X308 ECU

6. CAUTI
ONS:
Only remove the bolts securi ng the caliper anchor bracket
to the hub carrier. Refer to caution above for more information.
Do not allow the caliper to hang on the hydraulic hose, as
this will damage the hose.
Remove caliper from hub carrier.
Re
move bolts.
Re

move and tie caliper aside.

7.
Ali
gn brake disc access hole
with parking brake adjuster.
R
emove plug from access hole.
Rotate

brake disc until ac
cess hole is aligned with
adjuster.

8. Slacken parking brake adju
ster to
allow for the removal of the
brake disc.
Rot
ate adjuster clockwise.
9. Remove brake disc from hub.

Rear Di
sc Brake - Brake PadsVe
hicles With: Standard Brakes
Remo
val and Installation
Remov
a
l
W
A
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.
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 vehicl e and support on stan ds. See Section 100-
02.
3. Remove both rear wheels. See 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.
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 b
rake pads.

Parking Brake and Ac
tu
ation - Parking Brake
Description an
d Operation

Parts List
The parking-brake hand lever is mounted on the transmission tunnel and incorporates the ratchet mechanism and release
button.
The front cable is routed from the hand lever, under the carpet through to an abutment bracket adjacent to the
transmission tunnel, and then connected to the relay lever. The relay lever is attached to a mounting plate by a center bolt
on which it rotates The relay lever mounting plate straddles the transmission tunnel, the plate is secured by four bolts. The
relay lever acts as a center pu ll system to transmit the force from the hand lever to the rear brakes shoes. The equalizer
which is positioned in the center of the rear brake cables balances the force that is applied to the rear brakes.
The rear brake cables are linked together: each cable passes through the rear hub carrier and connects to a brake shoe
expander lever. Application of the parking brake causes the rear cables to pu ll on the expander levers, the expander lever
mechanism rotates on a pivot pin to force the brake shoes outwards to contact the brake drums.
The parking brake cables are adjusted by the rotation of a nu t on the adjuster rod. The parking brake shoes are adjusted by
It
em
Par
t Number
De
scription
1—Hand Le

ver
2—Front Cable


3—R

elay Lever and Mounting Plate
4—Drivesh

aft Center Mounting
5—Cable Adjuster Rod


6—Equalize

r
7—Cable Connector
8—Rear Ca

ble RH
9—Rear Ca

ble LH
10—Warn

ing Light Switch and Harness
11—War

ning Lamp

Parking Brake and Actuation - P
arking Brake Shoe
and Lining Adjustment
Gene
ral Procedures
1. Raise rear of vehicle and support on stands. See section 100-
02.
2. Remove both rear wheels.
3. Make sure that the parking br ake lever is in the released
position, and the gear selector lever is in neutral (N).

4. Alig
n brake disc access hole
with parking brake adjuster.
Instal
l three wheel nuts to secure brake disc to hub.
Tighten nuts to 20 Nm.
R e
move plug from access hole.
Rotate
brake disc un
til ac
cess hole is aligned with
adjuster.

5. Using a flat-bladed screwdriv er rotate the adjuster
anti
clockwise until the brake disc cannot be rotated.

6. NOTE : Th
e brake shoe return-spring next to the adjuster
prevents the adjuster from rota ting under normal operating
conditions. Make sure that the spring is seated between the
adjuster spokes, when brake adjustment is complete.
Rotate the adjuster gradually clockwise until the brake disc
rotates freely.
Inst al
l plug to access hole.
7. Repeat parking brake setting pr ocedure on opposite-side of
vehicle.
8. CAUTION: Make sure that th e rear wheels rotate freely
when the parking brake lever is released.
Adjust parking brake cable.
Ro
tate adjusting nut, until the parking brake can be
applied by raising the parking brake lever 3 to 5 clicks.

Parking Brake and Ac
tuat
ion - Parking Brake Warn ing Indicator Switch
Re
moval and Installation
Remov

al
Installation
1. R
emove driver seat for access. Refer to 76.70.01.
2. Raise hand lever fully.
3. Remove trim from hand lever. Refer to operation 76.13.63.

4. R
emove screws securing
switch to hand lever.

5. Di
sconnect electrical connector from switch.

1. Di
sconnect electrical connector from switch.
2. Install switch to hand lever.
Install and tigh
ten
screws to 3 Nm.

The t
andem master cylinder contains two in
dependent pistons, fluid pressure to each brake circuit is controlled by its own
individual piston. Brake fluid is supplied to the master cylinder by the reservoir, which is divided into two sections to preve nt
total fluid loss should one of the circuits fail. A port situated at the bottom of each section of the reservoir supplies the f luid
to each piston.
The fluid reservoir has a fluid-le vel indicator switch installed, which operates when the fluid level is low, causing the brake
fluid level warning-lamp to illuminate.
Bra
ke Caliper
The brake
calipers are of the single piston
type. The caliper carrier, which is secured to the vertical link by two bolts, carr ies
the single-piston caliper housing. The cali per 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 the brake pad in front of it, to wards the brake disc.
This movement forces the calipe r housing to move along the guid e-pins, in the opposite direction of the piston, to apply the
second brake pad.
Br
embo Brake Caliper
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.




Mast
er Cylinder and Reservoir

Hydraulic B
rake Actuation
- Brake Master Cylinder
Re
moval and Installation
Remov

al
• C
AUTIONS:
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.
1. Position vehi
cle on a four-post lift.
2. Open engine compartment and fit paint work protection covers
to fenders.
3. Disconnect battery ground cable (IMPORTANT, refer to
operation 86.15.19 for fu rther information).
4. Remove engine compartment rear cover. Refer to operation
76.11.35.
5. Remove pedal housing, brake booster and master cylinder
assembly. Refer to operation 70.35.39.
6. Place assembly on a work bench.

7. R
emove nuts securing master cylinder to brake booster.

8. R
emove master cylinder from brake booster.
Re

move master cylinder.
Remove an

d discard seal.
9. Remove filler cap and empty residual brake fluid into a
container. Fit cap.
10. Remove fluid reservoir from master cylinder.
R
emove locating pin.
Pull

reservoir from master cylinder.

2
. Align return spring.
3. Install pivot pins.
4. Install retaining wire: bend ends of wire to secure
pivot pins.

3. Inst
all brake warning-light switch.
Inst

all switch onto locating tag.
Install and tigh

ten nut and bolt to 3Nm.
4. Install brake booster and master cylinder assembly. Refer to
operation 70.50.18.
5. Install pedal housing, brake booster and master cylinder
assembly. Refer to operation 70.35.39.
6. Bleed brake system. Refer to operation 70.25.03.
7. Install engine compartment rear cover. Refer to operation
76.11.35.
8. Connect battery ground cable. (IMPORTANT, see 86.15.19 for
further information).