Goldacres Prairie Pro Operator's Manual page 92

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SET PRESSURE REDUCING VALVE
1. Park the machine on a flat level surface, engage
the parking brake and chock the sprayer wheels.
2. Open the boom into the working position and
lower to the minimum working height.
3. Isolate the boom lift cylinders by rotating the
Paralift cylinder valves to the off position.
4. Open the hydraulic yaw charge ball valves.
5. Identify the pressure reducing valve.
6. Loosen the adjustment lock nut and turn the set
screw counter clockwise 3 rotations.
7. This will generate minimum hydraulic oil pressure
in the sprayer hydraulic circuit.
8. With the hydraulic circuit engaged turn the set
screw IN (clockwise) until the hydraulic yaw
pressure gauges indicate 100 bar (1500 PSI). If the
pressure is exceeded the closed loop circuit must
be "cracked" to bleed off any excess pressure. The
Tilt Out can be used to generate pressure in the
hydraulic system.
CAUTION: Take care when working with hydraulic
oil under pressure. Ensure that excess oil is drained
into a container.
86 - Chapter 9 - Boom
t ent
9. Once the set screw is set to the correct pressure,
tighten the lock nut. Ensure that the set screw is
held firmly in position to prevent the pressure
fluctuating.
10. When the pressure is set correctly, charge
the circuit as described in next section 'System
Charging'.
Prairie Pro Operator's Manual MY19 - REV 2