Opener operation – Great Plains 3S-3000HDF Operator Manual v2 User Manual
Page 35
Great Plains Manufacturing, Inc.
Operating Instructions
31
2014-02-11
195-068M
Opener Operation
Crushing Hazard:
You will be seriously injured or killed if you are caught
between raising openers and drill frame. Always stop tractor
engine, set park bake, and remove key before adjusting or ser-
vicing openers. Keep all bystanders well away during drill
operation.
The openers are raised and lowered on their own
hydraulic circuit. When used with an active hydraulic
system, constant hydraulic down pressure is placed on
openers for even soil penetration across the drill. To
operate openers with live hydraulic power, always
connect the opener-lift hoses to the circuit designated for
hydraulic-motor control.
To achieve proper opener flotation, the opener hydraulic
circuit must be powered by an active hydraulic system.
An active hydraulic system requires a tractor with
closed-center hydraulics or pressure-flow compensated
hydraulics powered by a variable displacement hydraulic
pump.
To run drill on tractors with open-center hydraulics or on
tractors with fixed-displacement hydraulic pumps, you
must install a Great Plains kit, part number 194-143A.
Contact your Great Plains dealer for ordering
information.
If you are not familiar with your tractor’s hydraulics,
consult your tractor dealer.
For more information on opener adjustments, see
“Troubleshooting” on page 63.
High Pressure Fluid Hazard:
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 systems. If an accident occurs, seek immediate
medical attention from a physician familiar with this type of
injury.