GREAT PLAINS 1510HDP, Operator'S Manual

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1525P and 1510HDP Table of Contents Index Adjustments
Great Plains | 118-949M | 2018-07-03 Table of Contents Index 79
1. Determine the present opener and coulter depths.
2. Note which bracket hole the coulter is presently
using.
3. Determine which new hole will position the coulter
closer to the
1 
4
in-above depth. See the table below.
4. Remove the
5 
8
-11 x 4 inch bolt, lock washer and nut
( in Figure 116).
5. Move the blade to the new position. Insert the bolt,
and tighten on the lock washer and nut.
6. Re-adjust row cleaners, if installed.
If a worn coulter cannot be adjusted to satisfactory
operating depth, replace coulter.
Coulter Row Alignment
Refer to Figure 118
For unit-mounted coulters, the ideal alignment is for the
blade to open a furrow directly ahead of the opener
discs.
As a check on coarse alignment, sight along the coulter
blade center-line
, the gap between the opener
blades , and the centerline between the press
wheels . If they are clearly out of alignment, either the
coulter or the press wheels (or both) may be in need of
adjustment.
The exacting test of correct alignment is field results.
Operate the drill on some test ground (no seed required),
and verify that the opener blades are in the groove
opened by the coulter, and that the press wheels are
centered over the furrow. See “
Press Wheel
Adjustment ” on page 85 for press wheel alignment.
Hole
Number
Depth of (new) coulter blade relative to (new)
opener blades
1 inch (25mm) above
5 
8
in (16mm) above
1

4
in (6mm) above
0
3

8
in (9.5mm) below
3 
4
in (19mm) below
Figure 117
Coulter Blade Mounting Holes
29125
1
2
5
4
3
6
7
2
3
5
1
4
6
Figure 118
25 Series Coulter Alignment
26125
1
2
3
1
2
3