Great Plains 2S-2600F Operator Manual v2 - Manual (Page 37)

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Section 3 Adjustments
9/26/13 2S-2600 and 2S-2600F Two-Section Folding Drill 195-200M-A
Great Plains Mfg., Inc.
4. After opener down pressure is set, return tractor hy-
draulic lever to neutral. This locks in the selected pres-
sure, and opener frames will remain fixed in this
position.
NOTE: On some tractors with very positive remote hydrau-
lic checks, a slight increase in the reading on the pressure
gauges may occur after the tractor remote lever is re-
turned to neutral. This is caused by back pressure on the
opener cylinders and should be ignored. The NET OPER-
ATING PRESSURE on the opener cylinders is maintained
at the pressure you selected while the tractor remote lever
was held forward, not at the "apparently increased" pres-
sure. Reactivating the tractor lever forward will confirm
this.
Spring Down Pressure – Individual Openers
For planting in tire tracks, you can increase spring pressure
on individual openers. To increase spring pressure, tighten
flange nut at lower end of opener spring. See Figure 3-9.
Each 1/4-inch adjustment adds about 13 pounds of force at
opener disk. Do not tighten nut more than one inch. After
adjusting, lock flange nut in place with jam nut.
Figure 3-9
Individual Opener Pressure Adjustment
IMPORTANT: Open-center tractors and tractors with
fixed-displacement pumps are not designed to provide
a continuous supply of pressurized oil to remote valves.
Locking hydraulic lever forward on these tractors can
cause overheating of hydraulic oil and tractor damage.
After setting opener down pressure, always return hy-
draulic lever to neutral.
15637
00 Series Opener Depth
Press Wheel Adjustment
Set opener seeding depth by adjusting press-wheel
height. To adjust, first raise openers slightly, then lift and
slide T-handles on top of openers as shown in Figure 3-10.
Adjust all press wheels to the same height.
•
For shallower seeding, slide T handles toward drill.
•
For deeper seeding, slide T handles away from drill.
NOTE: Opener down pressure controls soil-firming pres-
sure on press wheel. Use press-wheel adjustments to reg-
ulate seeding depth and opener-down-pressure
adjustments to control opener penetration and soil firming.
Individual Opener Height
You may need to lower an opener which runs in a tire track.
To lower individual openers, move opener-pivot bolt to
lower hole in opener mount. See Figure 3-11.
Figure 3-11
Individual Opener Height
Figure 3-10
Press Wheel Adjustment
15659
15671