01/22/2018
Table of Contents
150-285Q
706/1006NT
Table of Contents
Setup
22
Coulter Depth Control
Coulter depth control is not factory pre-set for planting.
Adjustment is required prior to first field use of drill, or
planting will be too deep.
The drill is shipped with the valve and bracket assembly
in the highest position, to prevent shipping damage.
Refer to Figure 22
The drill lift cylinders control coulter depth. A depth valve
regulates the retracted length of the cylinders. The
valve is mounted on a bracket that adjusts vertically in a
5in (12.7cm) slot.
•
Coarse adjustment of the valve operating point is
provided by a depth stop engagement arm (6),
mounted by U-bolts on the rockshaft (7).
•
Fine adjustment of the valve operating point is
provided by a knob (9) controlling the vertical
position of the valve bracket. The valve needs to be
slightly above center in the slot to provide a useful
adjustment range.
If planting depth is known, and suitable conditions are
available, perform this adjustment in the field. Otherwise,
to roughly adjust for a presumed 2in (5cm) coulter depth:
1.
Fully raise drill, to provide freedom of adjustment.
2.
Turn adjustment knob counter-clockwise
(“SHALLOWER”) to place the valve bracket at the
upper
1
3
of travel.
3.
Lower drill until coulters just touch the ground.
4.
Loosen the nuts on the arm U-bolts, and adjust the
arm (6) until it just touches the valve (8) actuator.
5.
Raise drill. Turn knob clockwise (“DEEPER”) a few
turns.
6.
Lower drill and confirm that valve is stopping
downward movement at or above ground.
7.
Adjust knob, then raise and lower drill a few times to
recheck depth, until movement stops with coulters at
ground level.
8.
Turn knob to coulter depth. Each rotation lowers the
coulters approximately
1
4
in (6mm). This is 8 turns
clockwise for 2in (5cm) depth.
NOTE:
Changing depth of coulters affects planting depth of
openers. In field conditions, adjust press wheels to
compensate.
8
Figure 22
Coulter Depth Control
21708
9
6
8
7
