Great Plains 2S-2600F Operator Manual v2 - Manual (Page 21)

19
Section 2 Operating Instructions
9/26/13 2S-2600 and 2S-2600F Two-Section Folding Drill 195-200M-A
Great Plains Mfg., Inc.
3. 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 Fig-
ure 2-11. 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.
While seeding, remember:
•
Raise openers before turning. Never back up or turn
sharply with openers in ground. Doing so will plug open-
ers and may damage equipment.
•
For information on opener adjustments, see Opener
Down Pressure and Opener Depth, “Adjustments,”
starting on page 33. For more information on trouble-
shooting opener problems, see “Troubleshooting,”
page 44.
Figure 2-11
Press Wheel Adjustment
Priority Flow Hydraulic Systems
On some tractors with load-sensing hydraulics, the #1 cir-
cuit is capable of taking nearly 100 percent of available hy-
draulic flow. Operating the openers or markers on circuit
#1 will starve the other circuit, making one function inop-
erable.
To operate markers and constant opener down pressure
at the same time, connect the openers to circuit #2 and the
markers to circuit #3.
Opener Operation for Non-Active Hydraulic Systems
To run drill with open-center hydraulics or fixed-displace-
ment hydraulic pumps requires a Great Plains kit, part
number 194-143A. After installing the kit, refer to the fol-
lowing instructions for opener operation.
15659
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.
1. Lower opener frames by pushing forward on tractor
hydraulic lever. Lock lever temporarily in this position
while adjusting opener down pressure.
2. With tractor hydraulic lever locked forward, 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 2-8. Initially set down
pressure at 800 psi, then adjust as field conditions
warrant. For more information on adjusting opener
hydraulic down, refer to Opener Down Pressure,
“Adjustments,” page 33.
3. 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.
4. 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 Fig-
ure 2-11. 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.
While seeding, remember:
•
When approaching rough terrain where you need active
hydraulics to maintain even opener penetration, push
tractor hydraulic lever forward momentarily. As soon as
you return to level ground, return lever to neutral. Do not
activate tractor hydraulic lever for more than 20 seconds
at a time, once every 2 minutes. Always wait until tractor
and drill are on level ground before returning lever to
neutral. You can bump tractor hydraulic lever forward
any time on level ground to assure the preset pressure
is correctly locked in and to reset the system.
•
Raise openers before turning. Never back up or turn
sharply with openers in ground. Doing so will plug open-
ers and may damage equipment.
•
Each time you lower openers, hold tractor remote hy-
draulic lever forward for a few seconds to recharge cir-
cuit, then return lever to neutral. Return lever to neutral
only when tractor and drill are on level ground.
•
For information on opener adjustments, see Opener
Down Pressure and Opener Depth, “Adjustments,”
starting on page 33. For more information on trouble-
shooting opener problems, see “Troubleshooting,”
page 44.
IMPORTANT: Open-center tractors and tractors with
fixed-displacement pumps are not designed to pro-
vide a continuous supply of pressurized oil to remote
valves. Locking hydraulic lever forward on these trac-
tors can cause overheating of hydraulic oil and trac-
tor damage. After setting opener down pressure,
always return hydraulic lever to neutral.