Bi-Fold Breakaway Pressure - Goldacres G6 Crop Cruiser 2 Series Operator's Manual

Service – Boom Settings
7
2
3
6
Fully open the Yaw Bleed' (2), 'Yaw A' (3) & 'Yaw B' (6)
valves to purge air from the circuit.
To Purge Air from the Yaw Hydraulic
Circuit:
This procedure is typically only necessary
when the hydraulic Yaw circuit has been
opened, such as when replacing a component
eg, a hose or fitting.
1 Follow the 'Before Making Boom
Adjustments' instruction.
2 Loosen the locknuts and wind out
(counterclockwise) the 'Yaw Bleed' (2),
'Yaw A' (3) & 'Yaw B' (6) valves until fully
open.
If the pressure is too high then wind out (counterclockwise)
the 'Breakaway bleed' valve to reduce it in addition to
the pressure reducing valve. Then, close the 'Breakaway
bleed' valve and check the maximum pressure achieved
again. Pressure will not decrease on the gauge if only the
pressure reducing valve is wound out.
162
Move the boom fore & aft to purge air from the Yaw
hydraulic circuit.
3 Start the engine, then move the boom
around by hand for a minute or so to help
force air out of the hydraulic Yaw circuit.
4 Wind in (clockwise) the 'Yaw Bleed' (2),
'Yaw A' (3) & 'Yaw B' (6) valves until fully
closed, then tighten the locknuts.
5 Finally, re-adjust both Yaw Alignment
and Yaw pressure - for instructions see
previous pages.
3 1
2
4
9
8
5
6 7
The Hydraulic Bi-fold manifold on the boom centre section.

5 Bi-Fold Breakaway Pressure

Breakaway cylinders are fitted to a stage two
Bi-fold mechanism on 36-42 metre booms.
Oil in these circuits flows through the hydraulic
block mounted on the back of the boom
centre section.
The hydraulic breakaway pressure setting
determines the effective stiffness of the
breakaway damping and return force.
Remove one of the Yaw pressure gauges and
attach it to the test port 'BR MP' on the block.
1 To Breakaway Cylinder B
2 Accumulator 0.5L (70 bar)
3 To Breakaway Cylinder A
4 Gauge Test Port
5 Breakaway Pressure Reducing Valve
6 Tank (outlet)
7 Pressure (inlet)
8 Pressure Bleed Valve
9 Breakaway Return Speed Valve
Identification of items on the Bi-fold hydraulic manifold
(shown left).
To Set the Bi-Fold Breakaway
Pressure:
1 Follow the 'Before Making Boom
Adjustments' instruction.
2 Remove the cap and attached to the
pressure gauge to the Gauge Test Port (4).
3 The 'Breakaway Bleed Valve' (8) must be
fully closed (clockwise).
4 The hydraulic system will build pressure
when a function is activated.
Preferably engage 'Stage 1 Fold' OUT as
the boom is already folded out and will not
move in a hazardous way.
Remove the cap & attach a pressure gauge to the Gauge
Test Port (4).
GA8701177 REV 2 APRIL 2022