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Suspension System
wheel axis to minimise the effects of camber. The inner ball
joint locates in a tapered seat in the subframe and is secured
with a locknut. The inner and outer ball joints are not available
as serviceable items and if replacement of either is necessary,
a complete lower arm will be required.
The rear of the lower arm has a forged hexagon locating
in a mating hexagon in a compliance bush. The voided rear
compliance bush has a nylon outer and is fitted in a cast iron
housing which is attached to the subframe with two M14
bolts. The design of the housing allows the bracket to shear in
the event of a frontal crash, optimising crash performance. A
line is provided in the upper flat of the hexagon on the lower
arm, which allows the compliance bush to be positioned,
approximately, in the correct position to aid assembly to the
subframe.
As the suspension moves, the lower arm pivots on the inner
ball joint. The linear movement of the suspension is changed
to rotational movement of the lower arm controlled by the
stiffness of the rear compliance bush.
The compliance bush is not available as a serviceable item and
if replacement is necessary, a new bush and housing assembly
will be required.
Caution: Do not jack the vehicle under the front or rear
lower arm as damage or misalignment may occur.
Anti-Roll Bar (ARB) and Links
A solid spring steel ARB is used that operates, via ARB links,
from the spring seat on each strut. The bar diameter is 21.5
mm.
The ARB is attached to the rear of the subframe with two
Polytetrafluoroethylene (PTFE) bushes that are secured with
clamp plates and bolts. The low friction bushes PTFE require
no additional greasing and allow the ARB to rotate freely with
quiet operation. This allows the bar to respond quickly to roll
inputs and allows stiffer bushes to be used as there is relatively
little compression or twisting. Washers are attached to the
ARB to locate the outside of each bush and prevent sideways
movement of the bar.
The ends of the ARB are attached to each strut spring seat via
an ARB link. This arrangement allows the ARB to act on a ratio
of approximately 1:1 with the wheel travel providing maximum
roll bar effectiveness.
Each ARB link has a ball joint fitting at each end, which improves
response and efficiency. The top ball joint is mounted on the
axis of the link and attaches directly to the strut spring seat
and is secured with a locknut. The lower ball joint is mounted
at 90° to the axis of the link and attaches to the ARB and
is secured with a locknut. The link must be attached to the
ARB with the ball joint on the outboard side of the bar and
the locknut facing inwards. The ball joints on the ARB links
Version 2.0
are not serviceable and if replacement of either is necessary, a
new link will be required.
Front Suspension
552
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