Pub. # OM20-MSP3-3D
3-3
Flow control settings:
Open center hydraulic systems
1)
Set poppet valve in “up” raised position, this allows flow back to tank
2) Set engine at field rpm
3)
Set pH controller to “Manual” and run sampling shoe up and down, timing the cycle time.
4) If sampler raises in approximately 1.5 -2 seconds, leave flow control as is, if not, rotate control
knob to achieve desired speed.
Closed center hydraulic systems
1) Set poppet valve in down position. Push down and rotate so that rolled pin locks into closed
position. This blocks flow and allows the pump to de-stroke when the directional valve is in
the neutral position.
2) Adjust flow control valve to full open position.
3) Set engine at field rpm.
4) Run sampling shoe upward and adjust raise time to approximately 1.5-2 seconds using
throttling valve
on tractor’s remote coupler
Note: Excessive sampling shoe speed can damage electrodes.
Flow control valve
Adjustment control arm
Figure 5
• Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid the hazard
by relieving pressure before disconnecting hydraulic lines. Use a piece of paper or card-board,
NOT BODY PARTS, to check for suspected leaks.
• Wear protective gloves and safety glasses or goggles when working with hydraulic and high-
pressure wash systems.
• If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically
removed within a few hours or gangrene may result.
