Opener operation – Great Plains 3S-4000HDF Operator Manual User Manual
Page 38
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3S-4000HD/HDF
Great Plains Manufacturing, Inc.
195-067M
2013-06-13
Opener Operation
Crushing Hazard:
Keep all persons well away during drill operation. You will be
seriously injured or killed if you are caught between raising
openers and drill frame. Always stop tractor engine, set
parking brake, and remove key before adjusting or servicing
openers.
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 69.
High Pressure Fluid Hazard:
Relieve pressure before disconnecting hydraulic lines. Use a
piece of paper or cardboard, NOT BODY PARTS, to check for
suspected leaks. Wear protective gloves and safety glasses or
goggles when working with hydraulic systems. Escaping fluid
under pressure can penetrate the skin causing serious injury. If
an accident occurs, seek immediate attention from a physician
familiar with this type of injury.