Opener frame down-force – Great Plains 2S-2600HDF Operator Manual v2 User Manual
Page 66
62
2S-2600HD
Great Plains Manufacturing, Inc.
195-069M
2014-02-03
Opener Frame Down-Force
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 servicing openers. Keep all bystanders well away
during drill operation.
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 cardboard, NOT BODY PARTS, to check
for suspected leaks. Wear protective gloves and safety glasses
or goggles when working with hydraulic systems. If an acci-
dent occurs, seek immediate medical attention from a physi-
cian familiar with this type of injury.
Hydraulic opener down pressure controls drill-wide
opener penetration and press-wheel soil firming. Use
only enough down pressure to cut a furrow and maintain
proper soil-firming over seed. Excessive opener down
force may cause bulldozing of the openers in light soil
conditions, and leads to premature wear on opener com-
ponents.
The table at right shows the approximate force at open-
ers for a given pressure at the pressure control valve.
Note: To account for additional compaction from drill and
tractor tires, and Point Row option is not installed,
set pressure on inboard (“CENTER”) openers
slightly higher than outboard (“WING”) openers.
To run the drill with constant opener down pressure
requires 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. (If you are not
familiar with your tractor’s hydraulics, consult your tractor
dealer.)
Equipment Damage Risk: Tractors with load-sensing hydrau-
lics must use the bypass valve to operate the 2S-2600HD. Fail-
ure 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.
Note: To run the drill on tractors with open-center hydrau-
lics or on tractors with fixed displacement hydraulic
pumps you must install a Great Plains kit, part num-
ber 194-143A. Contact your Great Plains dealer for
ordering information. See “Non-Active Hydraulic
System” on page 34.
Pounds of Force at Opener Disks
Gauge
Setting
Row Spacing
6in
7.5in
10in
200 PSI
130
135
144
300 PSI
136
144
155
400 PSI
143
152
167
500 PSI
148
160
179
600 PSI
154
167
189
700 PSI
157
172
196
800 PSI
161
178
205
900 PSI
166
184
213
1000 PSI
171
190
223
1100 PSI
172
194
228
1200 PSI
180
203
240
1300 PSI
184
208
248
1400 PSI
189
215
258
1500 PSI
193
220
264
1600 PSI
198
227
274
1700 PSI
202
a
a. An empty standard drill (no markers, no fertilizer
capability and no small seeds capability) may
have insufficient available weight to reach these
force levels.
232
281
1800 PSI
209a
240
291
1900 PSI
213a
247
300
2000 PSI
217a
253a
309
2100 PSI
222
b
b. These down forces may be beyond the capability
of a drill with markers.
260a
318
2200 PSI
227
b
266a
327a
2300 PSI
232
b
273
b
336a