Great Plains 3N-4025P Operator Manual - Manual (Page 80)

76 3N-40P Table of Contents Index Great Plains Manufacturing, Inc.
196-538M Table of Contents Index 2014-01-29
Crushing Hazard:
Make all down-stop adjustments with circuit in neutral and
drill raised (actuator plunger not in contact with down-stop).
Loosening the down-stop with circuit active and drill lowered
results in rapid lowering of the frame.
Height Mis-setting Risk:
Make sure the drill is level and the lift system bled and
re-phased before adjusting the tool bar height. If the center
section does not consistently stop at the set height, or the
wings do not run at the same height as the center, the lift
system may have air or be out of phase (above), or the wings
may not be level. See “Frame Alignment and Level” on
page 142.
Refer to Figure 94
Note: The change in coulter height is greater than the
change in down-stop adjustment. Make
adjustments in small amounts.
The lift system includes an adjustable stop valve to fix
the height of the opener frame when the drill is lowered.
To adjust the stop height
(assuming a desired 1
1 ⁄
4
inch / 3.2 cm coulter depth):
1. Move to smooth level ground with soil as similar as
possible to field conditions.
2. Lower the drill until the coulter blades just touch the
ground. Hold that height by setting the lift circuit to
neutral.
3. Loosen the knob on the stop .
4. Adjust the stop position on the tube until it just
touches the actuator .
5. Raise and then fully lower the drill.
6. Pull forward 10 feet (3 m) and stop.
Figure 94: FMC:
Opener Depth Stop
20274
2
3
1
4
5
1
2 3
3 4
5