Active hydraulic systems – Great Plains 3S-3000HDF Operator Manual v1 User Manual
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3S-3000/F/HD/HDF
Great Plains Manufacturing, Inc.
195-441M
2014-07-01
Active Hydraulic Systems
1.
Lock hydraulic lever forward during field operation for
constant hydraulic flow to openers.
John Deere tractors with Sound-Gard® Body:
Use lever lock clip, John Deere part number R52667,
to lock lever forward. See your tractor dealer for clip
purchase and installation.
John Deere 7000 Series tractors: Rotate valve
detent selector to motor position to lock lever in
forward position.
John Deere 8000 Series tractors: Set timer to
continuous. Push lever forward until detent clicks.
Case-IH Magnum tractors: Lock lever forward in
detent position. You may need to turn up detent
pressure to its maximum setting. Do not tie hydraulic
lever past detent position with a strap. See your
tractor dealer for hydraulic-system details.
Other tractors: Lock lever forward in detent position.
You may need to turn up detent pressure to
maximum or use a mechanical detent holder to hold
lever forward. See your tractor dealer for proper
means of providing constant flow to openers.
Refer to Figure 24
2.
With tractor hydraulic lever locked forward and
openers in field position, release lock disk
and
set down-pressure with adjustment knob
. Watch
pressure gauge and dial in desired pressure on
openers. There is one pressure-control valve for
openers on center section and one for openers on
wing sections of drill.
Note: Rotate knob clockwise to increase pressure and
counterclockwise to decrease pressure.
3.
Once pressure is set, set knobs with lock disks
.
4.
In some applications, pressure on center section is
set slightly higher than the wings to account for
additional compaction from drill transport tires and
tractor tires. The recommended pressure range for
drilling is between 200 psi and 1200 psi (1200 psi
and 1800 psi for heavy duty models).
5.
For more information on adjusting hydraulic down
pressure, see “Row Unit Down Pressure
(Spring)” on page 55.
Machine Damage Risk:
Tractors with load-sensing hydraulics must use the bypass
valve to operate the 3S-3000HD. Failure to use the bypass
valve can cause major tractor damage. Before adjusting
opener down pressure, set bypass valve per “Setting the
Bypass Valve” on page 20.
Equipment Damage Risk:
During operation always raise openers before turning. Never
back up or turn sharply with openers in the ground. Doing so
will plug openers and may damage equipment.
FigureSpacer
Population Risk: Do not operate at pressures so high that
the gauge wheels loose traction, or are off the ground, result-
ing in skips and poor seed metering.
Figure 24 - Active
Pressure Control Valves
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