Great Plains NTA3010 Operator Manual - Manual (Page 43)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 39
2014-03-26 Table of Contents Index 160-219M-A
Coulter Adjustments
The frame-mounted coulters are factory-configured to
provide satisfactory results in most conditions. Three
adjustments are available for extremely light, extremely
heavy and/or in-track conditions.
Coulter Frame Height
Refer to Figure 42
When lowered, the gauge wheel lift cylinders are usually
not fully retracted. They have an adjustable stop set to
provide 2 inches (5.1 cm) coulter depth. The stop cuts off
flow to the rod end of the cylinder, stopping downward
movement and holding the cylinder at that position.
Each full rotation of the adjustment knob changes the
coulter depth by about
3 ⁄
16
inch (0.5 cm). Note your
starting position and final number of turns. Make the
same adjustment on all four lift cylinders (unless
correcting an imbalance traced to one lift cylinder).
• Turn the knob clockwise to lower coulters (increase
depth).
• Turn the knob counter-clockwise to raise coulters
(decrease depth).
Make depth adjustments with the drill slightly raised.
After adjusting the valve, raise and lower the implement
several times and recheck coulter depth.
Note: Do not lower coulters to achieve a desired depth
unless the cylinders are already operating at their
stops in the field. If there is insufficient down-force
for your conditions, lowering the coulters will not
increase their depth.
Figure 42
Wing Gauge Wheel Cylinder Depth
Stop Control
16271
Null4.aac: Rais
Null4.aac: Low