1998 JAGUAR X308 lock

Suspension System - General Information - Front Camber and Caster
Adjust
ment
Gen
eral Procedures
• NOTE: Before any work is commenced, th e vehicle must be checked to establish that it conforms to the Jaguar original
specification, e.g. wheels, ti res, tire pressures, etc.
• NOTE: The vehicle must be unladen and the fuel tank full when measuring suspension geometry.

1.
Road test the vehicle to establish the exact nature of the
complaint, e.g. pulling to one side, wander.
2. Measure the suspension geometry, fill in the 'Suspension
Geometry Record Form', and co ntact Jaguar Technical Support
for assistance.
3. Technical Support will give advice on the course of action to be
taken to rectify the problem.
4. Each lower wishbone pivots on and is secured to the front
crossbeam by two fulcrum bolts. A circular eccentric flange
formed under the hexagonal head of each fulcrum bolt, has
raised graduation marks to indicate radial position. A washer
with a 'D' shaped hole locates on a flat on the threaded section
of each bolt. This ensures that the washer rotates with the bolt,
maintaining an eccentric position corresponding with the
flanged head. The outer face of the washer is punch marked,
ensuring correct instal lation with the chamfered face inwards.
This permits the washer to rotate freely in the crossbeam cam
reaction plate during a djustm ent. Each fulcrum bolt and
washer are secured by a self locking nut.
On rotation of the bolt, lateral movement of the eccentric flange
and washer is restricted by the cam plate faces, forcing the bolt
shank to move laterally in the crossbeam slots. Lateral
movement of the bolt shank re sults in corresponding inward
and outward movement of th e wishbone arm, effecting
adjustment of wh eel alignment.
Rotation of the front fulcrum bolt principally adjusts wheel
caster angle, with a small amount of camber angle change.
Adjustment of the rear fulcrum bo lt mainly alters wheel camber
angle with a small amount of caster angle change.
On vehicles with VIN up to 833124, fulcrum bolt eccentric
flanges have raised graduation marks representing 15 degree
increments of bolt rotati on from 0 to 90 degrees.
On vehicles with VIN from 833125, the fulcrum bolt graduation
marks represent bolt shank ho rizontal movement in 1mm
increments from 0 to 3mm.
The upper wishbone and fulcrum shaft are not adjustable and
play no part in steering geometry adjustment.

Upper
Wishbones
Each
upper wi
shbone assembly is a on
e-piece steel forging incorporating:
A pres
s-fit ball joint.
Press-fi

t bushes for location of the upper fulcrum bolt.
Lower Wishbones
Each l
o
wer wishbone comprising
forged steel front and rear arms bolted together, incorporates:
A p
ress-fit ball joint in the outer extremity of the rear arm.
Press-f
i
t bushes for location of the lower fulcrum bolts
Locati
on for the shock absor
b
er lower mounting plates.
Vertica l Links

The vertical
links are of forged steel
wi
th integral steering arms. Each is suppo rted between the upper and lower wishbones
by two ball joints and carries:
Front hub

Brake ca
liper and disc shield assembly

ABS se
nsor
.
Front Hub
s

Each f
o
rged steel front hub accommodates sealed for life cartridge
type wheel bearings, and carries:
The brake rotor assembl
y.
A
h
ub nut with toothed, integral ABS rotor.
Su
s
pension spring pi
n locking device.
Front Road
Springs
The road spri
ng
s are of coil type with their
rating dependent upon vehicle specification
Ea
ch spring is installed between the suspension crossbeam location and the lower wishbone spring pan.
Ru
bber seats ar
e installed betw
een the spring and the crossb eam and the spring pan.
Front Shock A
bsorbers
Th
e
shock absorbers are telescopic hydrau
lically operated units. Optional adaptive damping units incorporate a solenoid-
operated control valve at their upper extremity.
Each shoc
k absorber is installed between the lowe
r wishbone rear arm and a recess in the body.
The l
o
wer end of the shock absorber is se
cured to plates on the wishbone by a bolt that also serves as a pivot.
The u
pper en
d of each shock absorber is secured to the body location by a single nut.
Front Sta
b
ilizer Bar
A
front stabil
izer bar installed on all vehicles
is rated according to suspension specification.
Opera
tion
As each road wheel r
i
ses, move
ment is transmitted through the vertical link assembly to the lower wishbone. The resulting
rise of the wishbone compresses the road spring and partially telescopes the shock absorber. During this action, the spring
absorbs associated shocks and the shock absorber minimizes sprin
g os c
illation.

Du

ring cornering, vehicle weight
is transferred to the outer road wheel with a resulting tendency for the inner wheel to lift.
The stabilizer bar assists in minimizing this tendency by transf erring a proportion of potential lift of the inner wheel to the
outer wheel. This result s in enhanced body stability with improved corner ing capabilities.

Front Suspension - Ba
ll Joint
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.
The ball joint must be returned for wa rranty purposes, care must therefore be exercised to avoid damaging it during
removal. Any damage incurred during removal must be noted and recorded.
S
pecial Tool(s)

Ball

Joint Taper Separator
204-192 (JD 219)

Front Camber Tie-do
wn Link
204-114 (JD 133)

B
all Joint Remover
204-200 (JD 240)

B
all Joint Installer
204-199 (JD 239)
1. R
aise front of vehicle.
Refer to Section 100-02.

2. F
ully slacken adjuster nut of special tool 204-114 and position
tool in center of road spring .

3. Lower front of vehicl
e.

4. W
A
RNING: ENSURE THAT THE DOWEL OF TOOL 204-114
IS CORRECTLY POSITIONED ACROSS THE SUSPENSION TURRET
SLOT.
Locate special tool in suspension turret slot.
Pas s
special tool 204-114 thro
ugh slot in suspension turret
and rotate stem to locate dowel.

5. WARNING: WHE N
TIGHTENING
TOOL NUT, USE LOWER
DOWEL AS A GUIDE TO ENSURE THAT THE TOOL STEM DOES
NOT ROTATE AND DISTURB POSITION OF DOWEL IN
SUSPENSION TURRET.
Tighten nut of special tool 204-114 to full extent, to achieve
suspension mid-laden position.
6. Ra
ise front of vehicle and support
on stands. refer to Section
100-02.
7. Remove appropriate road wheel. Refer to Section 100-02.

8. Remove an d discard tiestraps se
curing wheel speed sensor
harness to upper wishbone.
9. Move steering to appropriate full lock for access to suspension.

10 . R
emove nut securing upper wish
bone ball joint to vertical
link.
11. CAUTION: Do not use special tool 211-098 in the

Front Suspension - Rear Lower Arm
Remo
val and Installation
Remov
a
l
CAUTI
O
N: 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. Refer to Section 100-00 for further
information.
S p
ecial Tool(s)

R
o
ad spring compressor
204-111 (JD115)

Taper separator
2
11-098 (JD 100)

Ball
Jo
int Taper Separator
204-192 (JD 219)

Bal l
joint splitter
204-293
1. Ra
ise front of vehicle and support on stands. Refer to Section
100-02.
2. Remove appropriate road wheel. Refer to Section 100-02.

3. CAUTIO
N: Do not suspend caliper from brake hose as
this will damage the hose.
Remove brake calipers from carriers. 1. Remove caliper spring clip.
2. Remove guide pin dust caps.
3. Slacken and withdraw guide pins.
4. Remove caliper from carrier and tie to suspension mounting bracket.
4. Ra
ise vehicle further to provid
e access for Special Tool 204-

Front Suspension - Rear Lower Arm Bushing
Remo
val and Installation
Remov
a
l
CAUTI
O
N: 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. Refer to Section 100-00 for further
information.
S p
ecial Tool(s)

R
o
ad spring compressor
204-111 (JD115)

Taper separator
2
11-098 (JD 100)

Ball
Jo
int Taper Separator
204-192 (JD 219)

Bal l
joint splitter
204-293
1. Ra
ise front of vehicle and support on stands. Refer to Section
100-02.
2. Remove appropriate road wheel. Refer to Section 100-02.

3. CAUTIO
N: Do not suspend caliper from brake hose as
this will damage the hose.
Remove brake calipers from carriers. 1. Remove caliper spring clip.
2. Remove guide pin dust caps.
3. Slacken and withdraw guide pins.
4. Remove caliper from carrier and tie to suspension mounting bracket.
4. Ra
ise vehicle further to provid
e access for Special Tool 204-

Front Suspension - Fron
t Shock Absorber
Re
moval and Installation
Remov

al
S
pecial Tool(s)

Front Camber Tie-do

wn Link
204-114 (JD 133)
1. 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.
For additional informat ion, refer to Section 100
-0
0 General
Informati

on
.
R
aise the front of the vehicle.
For additional informat ion, refer to Section 100
-0
2 Jacking and
Liftin

g
.

2.
Ful
ly slacken the adjuster nut of the special tool 204-114 and
position in the center of the road spring.

3. W
ARNING: ENSURE THAT THE DOWEL OF THE SPECIAL
TOOL 204-114 IS CORRECTLY POSITIONED ACROSS THE
SUSPENSION TURRET SLOT.
Locate the special tool in the suspension turret slot.
Pass
the upper dowel through the slot in the suspension
turret and rotate to locate the dowel.
4. Lower the front o
f
the vehicle.
5. WARNING: WHEN TIGHTENING THE TOOL NUT, USE THE
LOWER DOWEL AS A GUIDE TO ENSURE THAT THE TOOL STEM
DOES NOT ROTATE AND DISTURB THE POSITION OF THE DOWEL
IN THE SUSPENSION TURRET.
Tighten the nut of the special tool 204-114 to its full extent, to
achieve a suspension mid-laden position.

I
nstallation


1.
Install th
e shock absorber through the lower wishbone.

2. Att
ach the shock absorber.
Inst

all the lower shock ab
sorber retaining nut.
Ins
tall the lower shock absorber retaining bolt.
Ti

ghten to 43 to 57 Nm.

3. At
tach the shock absorber to the upper mounting.
Install th

e upper washer and isolator.
Inst

all the shock absorber upper retaining nut.
Posi

tion a wrench on the shock absorber shaft flats to
prevent rotation (wrench in socket on vehicles with
adaptive damping).
Tigh
ten the shock absorber upper lock nut to 30-40 Nm
(16-18 Nm on vehicles with adaptive damping).
4. CAUTION: Make sure the adaptive damping electrical
connector is correctly aligned. Failu re to follow these instructions
may cause damage to the electrical connector.
On vehicles with adaptive damping: