Great Plains YP1625 Operator Manual - Manual (Page 63)

Great Plains Manufacturing, Inc. Adjustments 59
03/12/2012 401-226M-A
Unit-Mounted Coulter Adjustments
The ideal operating depth for coulters is 1 ⁄
4
in (6mm)
above opener depth. Although they may have originally
been set to this depth, coulter (and opener) blades wear
with time, and may need adjusting.
Adjusting the coulter depth is accomplished by re-mount-
ing the coulter blade in one of the six mounting holes
arranged in a staggered pattern in the coulter bracket.
Refer to Figure 81 and Figure 82
Raise planter and install cylinder locks before working on
coulters. Row unit may be fully lowered or locked up. Do
not attempt to move blade when the current or new posi-
tion causes it to contact the ground during the adjust-
ment. Be careful around the front end of row units. Row
clear tines and coulter blades may be sharp.
To adjust coulter depth:
1. Dismount row cleaner (if present) to reduce risk of
injury.
2. Determine the present opener and coulter depths.
3. Note which bracket hole the coulter is presently
using.
4. Determine which new hole will position the coulter
closer to the
1 ⁄
4
in-above depth. See the table below.
If none, don’t move it.
5. Remove the 5 ⁄
8
-11 x 4in bolt, lock washer and nut (
in Figure 81).
6. Move the blade to the new position. Insert the bolt,
and tighten on the lock washer and nut.
7. Re-adjust openers, if installed.
If a worn coulter cannot be adjusted to satisfactory oper-
ating depth, replace coulter blade.
End of “Unit-Mounted Coulter Adjustments”
Hole
Number
Depth of (new) coulter blade
relative to (new) opener blades
1in (25mm) above
5 ⁄
8
in (16mm) above
1 ⁄
4
in (6mm) above
0
3 ⁄
8
in (9.5mm) below
3 ⁄
4
in (19mm) below
FigureSpacer:
Figure 81
25 Series Unit-Mounted Coulter
29124
7
FigureSpacer:
Figure 82
Coulter Blade Mounting Holes
23288
1
4
6
2
3
5
7
2
3
5
1
4
6