Great Plains 2S-2600F Operator Manual v2 - Manual (Page 20)

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Section 2 Operating Instructions
2S-2600 and 2S-2600F Two-Section Folding Drill 195-200M-A 9/26/13
Great Plains Mfg., Inc.
Opener Operation
The openers are raised and lowered on their own hydrau-
lic circuit. When used with an active hydraulic system, con-
stant 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-cen-
ter 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.
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 ad-
justing or servicing openers. Keep all bystanders well away
during drill operation.
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 card-
board, NOT BODY PARTS, to check for suspected leaks. Wear
protective gloves and safety glasses or goggles when working
with hydraulic systems. If an accident occurs, see a doctor im-
mediately. Any fluid injected into the skin must be surgically re-
moved within a few hours or gangrene may result.
Opener Operation for 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 pur-
chase and installation.
John Deere 7000 Series tractors: Rotate valve
detent selector to motor position to lock lever in for-
ward position.
IMPORTANT: Tractors with load-sensing hydraulics
must use the bypass valve to operate the 2S-2600. Fail-
ure to use the bypass valve can cause major tractor
damage. Before adjusting opener down pressure, set
bypass valve as explained under Setting the Bypass
Valve, page 16.
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 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 for-
ward. See your tractor dealer for proper means of pro-
viding constant flow to openers.
2. Set opener down pressure. There is one pressure-
control valve for openers on center of drill and one for
openers on outside ends of drill. See Figure 2-12. Ini-
tially set down pressure at 800 psi, then adjust as field
conditions warrant. For more information on adjusting
hydraulic down pressure, refer to Opener Down Pres-
sure, “Adjustments,” page 33.
Figure 2-10
Pressure Control Valves
15557