Yaw Alignment; Yaw Hydraulic Pressure - Goldacres G6 Crop Cruiser 2 Series Operator's Manual

Service – Boom Settings
7
1
2
3 6
4 5
The hydraulic manifold on the centre secton (36-42m
booms).

3 Yaw Alignment

The boom should be positioned parellel to
the rear of the sprayer chassis. To check Yaw
Alignment, measure the exposed cylinder
rods on both the left & right Yaw hydraulic
cylinders.
Each cylinder rod extension should be the
same if the boom is running parellel to the end
of the chassis.
Wind out the Yaw valve A until fully open.
160
1 Pressure Reducing Valve
2 Yaw Bleed Valve
3 Yaw A Valve
4 Test Port/Pressure Gauge Yaw A
5 Test Port/Pressure Gauge Yaw B
6 Yaw B Valve
Identification of items on the hydraulic block (shown left).
To Adjust the Yaw Alignment:
1 Follow the 'Before Making Boom
Adjustments' instruction.
2 The boom yaw is controlled by a pair of
hydraulic cylinders & accumulators.
Loosen the locknuts, then wind out
(counterclockwise) both 'Yaw A' and 'Yaw
B' valves (shown above 3 & 6) until fully
open.
Wind out the Yaw valve B until fully open.
Move the boom by ahnd to adjust the Yaw Alignment.
3 Move the boom by hand until it is sitting
perpendicular to the chassis line of
the machine - Each Yaw cylinder rod
extension must be the same.
4 Wind in (clockwise) both both 'Yaw A' and
'Yaw B' valves (shown above 3 & 6) to until
fully closed, then tighten the locknuts.
The default Aligned Yaw position is now
set.
Exposed cylinder rod (on both left & right hand Yaw
cylinders) must be the same.
Two Yaw hydraulic cylinders (located on the boom
centre section) & an accumulator form the independent
pressurised Yaw hydraulic circuit.

4 Yaw Hydraulic Pressure

The Yaw Hydraulic Pressure controls the Yaw
suspension
Two hydraulic cylinders and accumulators
are charged with hydraulic pressure and
closed off creating a closed circuit for the yaw
suspension.
The base end of each yaw cylinder is
connected to the rod end of the opposite
cylinder with one nitrogen charged (70 bar)
accumulator connected separately to each.
When the rod end of one cylinder
compresses, it causes the base end of the
opposite cylinder to extend and vice versa.
The accumulators help dampen movement &
keep the boom centred.
GA8701177 REV 2 APRIL 2022