Goldacres Prairie Pro Operator's Manual page 100

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The pressure in the Bi-fold circuit will vary
depending on what si e boom is fitted, up to a
maximum pressure of 1700 PSI.
BOOM SIZE
24 m
28 m
30 m
33 m
36 m
The bi-fold pressure is shown on the gauges located
on the hand rail on the sprayer pull.
The bi-fold pressure is adjusted at the spool block.
See Chapter 10 'Lubrication & Maintenance for
more information on the spool block.
With the boom fully folded out, check the bi-fold
pressure on the gauges at the front of the sprayer.
Note if the pressure needs to be increased or
decreased. Bi-fold the boom so that only the outers
are folded in. The bi-fold pressure should now be
reading zero.
Locate the bi-fold pressure reducing valve on the
spool block mounted on the centre section. Winding
the knob in will increase the pressure, winding it out
will decrease pressure. When adjusting the pressure,
only make small changes. Fold the boom out and
check the pressure reading on the gauges. If not
reading correct, bi-fold the boom in again and make
another adjustment. Always make adjustments while
the boom is bi-folded in and re-check when the
boom is fully folded out. When the correct pressure
is reached, tighten the lock nut on the pressure
adjusting screw on the spool block.
94 - Chapter 9 - Boom
t ent
BI-FOLD PRESSURE
1500 PSI
1550 PSI
1600 PSI
1650 PSI
1700 PSI
Bi-Fold pressure reducing valve
If the bi-fold loses pressure while operating, the
check valves may be leaking. If they are leaking, they
should be replaced.
The check valve for the right hand side is located
closest to the paralift; the left side check valve sits on
top of it.
Above: Bi-fold double pilot operated check valves.
WARNING: Working with hydraulics can be very
dangerous. While operating the boom, all people and
objects should be clear of the boom wing fold radius.
Nobody should be on or near the centre section,
while hydraulic functions are operated.
Prairie Pro Operator's Manual MY19 - REV 2