
2018-10-10
407-313M
NP30L or NP40L
Adjustments
70
Hydraulic Depth Stop Adjustment
This applies to pull-type applicators only. See page 68 for
2-point and page 69 for 3-point.
The lift system includes an adjustable stop valve, on the
left front caster wheel, to fix the height of the opener
frame when the implement is lowered.
Note: The change in coulter depth is not linear and can be
greater than the change in down-stop adjustment.
Make adjustments in small amounts.
1.
Move to smooth level ground with soil as similar as
possible to field conditions.
2.
Unfold the implement (page 50).
3.
Lower the implement until the coulters just touch the
ground. Hold that height by setting the lift circuit to
Neutral.
4.
Using the knob
on the stop, adjust the stop
position until the plunger
just touches the top of
the stop clevis bolt
Note: It is not necessary to adjust the stop clevis bolt.
5.
Raise and then fully lower the implement.
6.
Pull forward 10 feet (3m) and stop.
7.
Measure the depth at which the coulters are running.
If the coulters are at the desired depth, no further
adjustment is necessary. Skip to step 12.
8.
Raise the implement and set the lift circuit to neutral.
9.
Adjust the stop up (to increase depth) or down (to
reduce depth). Adjust in small increments.
10. Check the new setting starting at step 5.
11. Adjust weight-transfer (page 71) to hold wings level
at this coulter height for these field conditions.
12. Raise and lower several times and confirm that the
implement stops consistently at the new height.
Make sure the implement 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 “
Figure 51
Hydraulic Depth Stop
38833
1
2
3
Crushing Hazard:
Make all down-stop adjustments with circuit in Neutral and
implement raised (actuator plunger not in contact with
down-stop). Loosening the down-stop with circuit active and
implement lowered results in rapid lowering of the frame.
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