Great Plains YP4025F-1670 Operator Manual - Manual (Page 81)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 77
2014-09-08 Table of Contents Index 401-571M
To adjust coulter depth:
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
×
4 in. bolt, lock washer and nut (
in Figure 92).
5. Move the blade to the new position. Insert the bolt,
and tighten on the lock washer and nut.
If a worn coulter cannot be adjusted to satisfactory
operating depth, replace the coulter blade.
Coulter Row Alignment
Refer to Figure 94
For unit-mounted coulters, the ideal alignment is for the
blade to prepare a furrow directly ahead of the opener
discs.
As a check on coarse alignment, sight along the coulter
blade centerline
, 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 planter on some test ground (no seed
required), and verify that the opener blades are in the
groove opened by the coulter.
Adjust UMC Alignment
To adjust unit-mounted coulter alignment, loosen the four
bolts
that attach its bracket to the row unit. The holes
on the row unit are slotted, side-to-side, and allow the
coulter bracket sideways and rotational adjustment.
Keep the coulter blade vertical while adjusting.
If the blade cannot be brought into alignment, check that
the blade spindle itself is using the same hole location on
each side of the bracket.
Adjust FMC Alignment
To adjust frame-mounted coulters, loosen the same bolts
used to make vertical adjustments.
Row-Unit Opener Disk Adjustments
Note: Applies to all Series openers.
Figure 93
Coulter Blade Mounting Holes
29125
Hole
No.
Depth of (new) coulter blade relative
to (new) opener blades
1 in. (25 mm) above
5 ⁄
8
in. (16 mm) above
1 ⁄
4
in. (6 mm) above
0 (factory standard hole)
3 ⁄
8
in. (10 mm) below
3 ⁄
4
in. (19 mm) below
2
3
5
1
4
6
1
2
5
4
3
6
7
1
2
3
Figure 94
10HD Unit-Mount Coulter
29219
4
1
2
3
4