Goldacres Super Cruiser G8, Operator'S Manual, Page: 140 / 210

136 - Chapter 10 - Lubrication & Maintenance G8 Super Cruiser Operator’s Manual MY19 - REV 0
Suspension
The five point suspension system used on the
machine consists of four parallel links, one Panhard
rod and two air bags on each axle. The rear axle of
the machine is also fitted with an anti roll sway bar.
Parallelogram links hold the axle in place on the
chassis. Panhard rods hold the axle centred in the
chassis. The parallelogram arms allow the axle to
distort or twist forward and backwards when the
wheels come in contact with an obstruction such
as a pot hole, log or embankment. This oscillation is
absorbed by polyurethane bushes in each end of the
links. The life time of these bushes is subject to the
conditions the machine operates in and the style of
operation that it receives. The polyurethane bushes
should be checked at regular service intervals as
stated in this manual. Air bags mounted on to each
side of the axle allow the axle to oscillate.
Polyurethane Bushes
There are two sized polyurethane bushes used in the
suspension system on this machine. The first bushes
are located in the Para Link and Panhard rods. There
are 20 of these bushes used in the machine and they
can be purchased from your Goldacres dealer.
The second bushes are located on the sway bar.
Polyurethane bushes wear gradually over time and
should be checked for movement during servicing.
If there is any play in these bushes they should be
replaced.
Parallel Link
Each end of the parallel link is attached to the chassis
and differential with polyurethane bushes and 3/4”
high tensile bolts. These links hold the axle in place
while the bushes allow deflection when the wheels
come in contact with an impact such as wash out
or embankment. The bolts and bushes should be
checked each time that the vehicle is serviced. If the
axle is tending to twist or rock the bushes must be
replaced.
Shock Absorbers
There are four shock absorbers fitted to the
machine, one fitted to each side of the front and
rear axle. The shockers dampen the movement of
the air bags to prevent recoil. These should be check
for damaged rubbers or oil leaks.
Panhard Rods
The Panhard rods fitted to the machine are designed
to prevent any sideways movement of the axles and
to hold the axles central to the chassis. These rods
are attached to the top of the axle and bottom of
the chassis with two polyurethane bushes and 3/4”
high tensile bolts. These bolts and bushes should be
checked each time that the vehicle is serviced. If the
axle is tending to twist or rock the bushes must be
replaced.
Sway Bar
The sway bar is attached to the chassis and top of
the rear axle with polyurethane bushes. This bar is
designed to prevent excessive roll in the vehicle. The
bushes should be checked each time that the vehicle
is serviced.
Air Bags
The four air bags use compressed air to inflate them.
They have ride height valves attached to the chassis
and axle. As a load is exerted on the chassis the air
bags will compress lowering the ride height valve
arm. The ride height valve will then let air into the air
bag causing it to inflate. As load is lessened on the
axle the air bags will expand raising the arm of the
ride height valve. The ride height valve will exhaust
letting air flow out of the air bag causing it to deflate
until the ride height arm becomes level again.
The air bags have internal rubber bumps that
prevent the air bag bottoming out and jarring when
the axle contacts large obstacles.
The rear axle has two ride height valves which
level the sprayer, the front axle has one ride height
valve in the middle of the axle which maintains the
required height and allows it to pivot freely.
Air Bag Height Settings
The front air bag height should be set at 340 (+-5)
mm. The rear air bag height should be set at 280
(+-5) mm. If this distance is not maintained the angle
of the drive shaft changes causing a vibration and
possible damage to the drive train.
The front & rear air bag is measured from the inside
of the top mount to the bottom of the plastic skirt
of the air bag.
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