JAGUAR X308 1998 2.G Workshop Manual

R
ear Brake Disc Runout Check Vehicles Without: Brembo Brakes
Special Service tools
D
ial Test Indicator Gauge and Stand.
1

. Raise rear of vehicle and support on stands. Refer to section
<<100-02>>.
2. Remove wheel.
3
.
C
AUTION:
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.
4. NOTE:

Me
asurement of the brake disc run-out, must be carried-out with the disc and hub parking-brake
adjuster-holes aligned.
Make sure that wheel bearing end-float is correct. Refer to specification section <<204-02>>.
5.
Measure brake disc run-out.
 Install brake disc to hub and secure with all wheel nuts, tighten wheel nuts to 20 Nm in a diagonal
sequence.
 Position the gauge so that the pointer contacts the disc 10 mm from its outer edge.
 Slowly rotate the disc one revolution, the disc run-out must not exceed the specification. Refer to
specifications in section <<206-04>>.
6. If the brake disc run-out exceeds specification, check the hub face run-out.
7. Remove brake discs. Refer to procedure 70.10.13.
8.
Measure hub face run-out.



Position the gauge so that the pointer contacts the hub face.
 Slowly rotate the hub one revolution, the hub run-out must not exceed the specification. Refer to
Specification Section <<204-01>>.
 If the hub exceeds the maximum run-out specification replace the hub. Refer to Section <<204-01>>.
9. NOTE:
Make sure the brake disc and hub mating surfaces are clean.
If the hub run-out is within specification replace brake discs. Refer to procedure 70.10.13.
1
0. Install caliper housing to caliper carrier.
1. Align housing to carrier.
2. Install and tighten guide pins to 25-30 Nm.
3. Install dust covers.
4. Install anti-rattle spring.
11. Fit wheel. Refer to section <<204-04>>.

Rear
Brake Disc Runout Check Vehicles With: Brembo Brakes
Special Service tools
Di
al Test Indicator Gauge and Stand.
1.


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.
CA
UTION:
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.
CA
UTION:
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 bracket to the hub carrier only. DO NOT loosen any other caliper bolts.
Raise rear of vehicle and support on stands. Refer to section <<100-02>>.
2. Remove wheel. Refer to operation <<74.20.05>>.

3
. Remove brake pads from caliper.
1. Withdraw pins from caliper.
2. Remove anti-rattle spring.
3. Remove brake pads.
4
.
C
AUTION:
Only remove the bolts securing the caliper anchor bracket to the hub carrier. Refer to caution
above for more information.
C
AUTION:
Do not allow the caliper to hang on the hydraulic hose, as this will damage the hose.
Remove caliper from hub carrier. Remove bolts.
 Remove and tie caliper aside.

5.
Make sure that wheel bearing end-float is within specification. Refer to specification section
<<204-02>>.
6.

NOTE:
Measurement of the brake disc run-out, must be carried-out with the disc and hub access holes aligned.
7.
Measure brake disc run-out.
1. Install brake disc to hub and secure with all wheel nuts, tighten wheel nuts to 20 Nm in a diagonal sequence.
2. Position the gauge so that the pointer contacts the disc, between the disc's outer drill holes and the disc's outer edge.
 Slowly rotate the disc one revolution, the disc run-out must not exceed the specification. Refer to
specifications in section <<206-04>>.
8. If the brake disc run-out exceeds specification, check the hub face run-out.

9
. Remove brake discs. Refer to procedure 70.10.13.
1

0. Measure hub face run-out.
Position the gauge so that the pointer contacts the hub face.
 Slowly rotate the hub one revolution, the hub run-out must not exceed the specification. Refer to
Specification Section <<204-02>>.
 If the hub exceeds the maximum run-out specification replace the hub. Refer to operation
<<64.15.14>> .
11. If the hub run-out is within specification replace brake discs. Refer to procedure 70.10.13.
1
2. Install caliper to hub carrier.
Install and tighten bolts to 60 Nm.

13
.
CA
UTION:
Retracting the caliper piston may cause the fluid reservoir to over-flow. Remove brake fluid
spillage immediately from paint work with clean water.
CA
UTION:
Note condition of pins and replace if necessary.
Install brake pads to caliper. Slowly retract caliper pistons.
1. Install pads.
2. Position anti-rattle spring.
3. Install pins - make sure pin collets are fully engaged into caliper.
14. Fit wheel. Refer to section <<204-04>>.

Front Disc Brake -
Lubri
cants, Fluids, Sealants and Adhesives
Torques - Brembo Brakes
Torques
Brake Tube, Hoses and Bracket Torques
CAUTI
ON: 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.


UnitS
pecification
Brake flu

id
ITT Supe
r Dot 4
Com

ponent
Nm
B

olt - anchor bracket to vertical link
18
0
Bo

lt - caliper to anchor bracket
DO
NOT REMOVE
Bleed n

ipple
12
-16
Hose u

nion to caliper
22
-26
Com

ponent
Nm
Bol

t - caliper carrier to vertical link
14
0
Guide

Pin - caliper housing to caliper carrier
25
-30
Com

ponent
Nm
Bleed n

ipple - front
4-
6
Bleed n

ipple - rear
8-1
1
Hose to fr

ont caliper
10
-14
Hose union to rear cal

iper - union bolt
30
-40
M1

0 hose locknut
15
-20
M10

brake tube female-nut
13
-17
M10

brake tube male-nut
13
-17
M12

brake tube male-nut
15
-20
M18

brake tube male-nut
22
-28
Brake tube clip retention

-bracket to body
4-
6

Front Disc Brake - Front Disc Brake
Description and 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 vertical link by two bolts, carries the single-pis ton 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
e
m
Par
t
Number
De
scr
iption
1—B
r
ake Disc
2—Caliper Housin
g
3—Caliper Carrier
4—Brake Pads
5—Guide P i
ns
6—Du
st
Covers
7—An
ti
-rattle Spring
8—Du
st
Shield
9—Brake Hos
e

10—Bleed Nipp
le