Range Rover Sport. Manual — part 11
Description
1
Nut - link to stabilizer bar/upper arm (4 off)
2
Hardened washer (4 off)
3
Right hand Link
4
Upper arm
5
Bracket (2 off)
6
Locknut (4 off)
7
Bush (2 off)
8
Left hand link
9
Stabilizer bar
Vehicles with the Dynamic Response system use an active stabilizer bar. For additional information, refer to
Active
Stabilization System
(204-06 )
The stabilizer bar is fabricated from induction hardened, 31 mm diameter solid spring steel bar. The stabilizer bar operates,
via a pair of links, from their attachment to the upper arm.
The stabilizer bar is mounted on the forward face of the chassis front cross member and is attached to the cross member
with two, Teflon lined bushes. Brackets, which are pressed onto the bushes, are attached to the cross member with nuts,
screwed onto studs in the cross member. The stabilizer bar has crimped, 'anti-shuffle' collars pressed in position on the
The links, which are handed and have a ball joint at each end, are fitted with hardened steel washers at both ends. The top
ball joint is attached to the link at 90 degrees to the link axis. The ball joint is located in a hole in the side of the upper arm
and secured with the hardened steel washer on one side of the interface and a slef-locking nut on the other. The bottom ball
joint is attached to the link at 90 degrees to the link axis. The ball joint is located in a hole in the end of the stabilizer bar
and secured with the hardened steel washer on one side of the interface and the self-locking nut on other.
It is important that hardened steel washer is in the correct position between the stabilizer bar and the link ball joint and the
upper arm and the link ball joint and the correct, hardened washer is fitted.
CAUTION: Failure to fit the washer or using an incorrect washer will result in relaxation of the torque on the
self-locking nut and damage will be caused to the stabilizer bar, link and suspension upper arm.
UPPER ARM
Item Part Number
Description
1
Flanged bolt
2
Bush
3
Self locking nut
4
Flanged bolt
5
Bush
6
Self locking nut
7
Upper arm
8
Stabilizer bar link attachment hole (hidden)
9
Ball joint
10
Timing mark
11
Circlip
Self locking nut
13
Timing mark
The upper arm assembly comprises, the upper arm, two bushes and a ball joint. The upper arm is made from cast and
machined iron. Its outer end has a hole to accept the ball joint. A small indentation is located adjacent to the ball joint hole
and is used to obtain the correct orientation of the ball joint. A hole on the rear side of the arm provides for the attachment
of the stabilizer bar link.
The inner end of the arm has two bush housings which are machined in the arm casting. A bush is pressed into each
housing. The bushes are located between lugs on the chassis and are secured with bolts and self-locking nuts through
metal inserts in the centre of the bushes.
The ball joint is pressed into the upper arm. The ball joint is an interference fit in the hole which prevents the ball joint from
moving. A circlip is fitted to the ball joint to retain it in the hole. The top face of the ball joint has two semi-circular cut-outs.
One of these cut-outs must be aligned with the small indentation in the upper arm to ensure the correct operation of the ball
joint.
A bracket, located on on the underside of the upper arm, provides for the attachment of the air suspension height sensor
drop link.
LOWER ARM
Item Part Number
Description
1
Self locking nut
2
Washer
3
Cam washer
4
Bush
5
Bolt
6
Bolt
7
Hydrobush
8
Cam washer
9
Washer
10
Self locking nut
Self locking nut - damper lower attachment
12
Ball joint
13
Circlip
14
Self locking nut
15
Lower arm
16
Bolt - damper lower attachment
The lower arm assembly comprises, the lower arm, two bushes and a ball joint. The lower arm is a pressed steel fabrication
with a hole at its outer end to accept the ball joint.
The inner end of the arm has two fabricated bush housings which are welded to the arm pressing. A bush is pressed into
each housing. The rear bush is a hydrobush which provides a progressive increase in the hardness of the bush as the
deflection of the wheel increases. The bushes are located between lugs on the chassis and are secured with bolts and self-
locking nuts through metal inserts in the centre of the bushes. The forward bush, self-locking nut, has a cam washer located
beneath it. The cam washer is located between lugs on the chassis bracket and its orientation can be adjusted to set the
front camber. The rear bush, self-locking nut, also has a cam washer located beneath it. The cam washer is located
between lugs on the chassis bracket and its orientation can be adjusted to set the front castor.
A central aperture in the arm provides for the attachment of the damper module lower bush. The damper is secured with a
long bolt which is positioned through holes in the lower arm and secured with a self-locking nut.
The ball joint is pressed into the lower arm. The ball joint is an interference fit in the hole which prevents the ball joint from
moving. A circlip is fitted to the ball joint to retain it in the hole.
WHEEL KNUCKLE, HUB AND BEARING ASSEMBLY
Item Part Number
Description
1
Upper arm attachment
2
Brake caliper attachment holes
3
Brake hose bracket attachment point
4
Wheel speed sensor location
5
Wheel studs
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