Active hydraulic systems – Great Plains 2S-2600HDF Operator Manual v2 User Manual
Page 37
Great Plains Manufacturing, Inc.
Operating Instructions
33
2014-02-03
195-069M
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 for-
ward position.
John Deere 8000 Series tractors: Set timer to con-
tinuous. Push lever forward until detent clicks.
Case-IH Magnum tractors: Lock lever forward in
detent position. You may need to turn up detent pres-
sure to its maximum setting. Do not tie hydraulic
lever past detent position with a strap. See your trac-
tor dealer for hydraulic-system details.
Other tractors: Lock lever forward in detent position.
You may need to turn up detent pressure to maxi-
mum 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 30
2.
With tractor hydraulic lever locked forward and open-
ers in field position, release lock disk
and set
down pressure with adjustment knob
. Watch pres-
sure gauge and dial in desired pressure on openers.
There is one pressure-control valve for inboard
openers (“CENTER”) and one for outboard openers
(“WING”). If the Point Row option is installed, the
controls are Left (“LEFT”) and Right (“RIGHT”).
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 inboard end of
wings (CENTER) is set slightly higher than the out-
board ends (WINGS) to account for additional com-
paction from drill transport tires and tractor tires. The
recommended pressure range for drilling is between
1200 psi and 1800 psi, and initially 1400 psi.
5.
For more information on adjusting hydraulic down
pressure, see “Row Unit Down Pressure (Spring)”
on page 66.
Equipment Damage Risk:
Tractors with load-sensing hydraulics must use the bypass
valve to operate the 2S-2600HD. 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 19.
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.
Inconsistent Population Risk:
Do not operate at pressures so high that the gauge wheels
loose traction, or are off the ground, resulting in skips and
poor seed metering.
Figure 30 - Active
Pressure Control Valves
26477
1
2
1
2
1