Coulter adjustments – Great Plains PD8070 Operator Manual User Manual
Page 52
48
PD8070
Great Plains Manufacturing, Inc.
401-479M
2014-07-23
Coulter Adjustments
The ideal operating depth for coulters is
6.4 mm (
1
⁄
4
inches) 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-mounting the coulter blade in one of the six mounting
holes arranged in a staggered pattern in the coulter
bracket.
Refer to Figure 49 and Figure 50
Raise planter and install cylinder locks before working on
coulters. Do not attempt to move blade when the current
or new position causes it to contact the ground during the
adjustment. Be careful around the front end of row units.
Row cleaner tines and coulter blades may be sharp.
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 6.4 mm (
1
⁄
4
inch) above depth. See the
table below. If none is closer, don’t move it.
4.
Remove the
5
⁄
8
-11
× 4 inch bolt, lock washer and nut
(
in Figure 49).
5.
Move the blade to the new position. Insert the bolt,
and tighten on the lock washer and nut.
6.
Re-adjust openers, if installed.
If a worn coulter cannot be adjusted to satisfactory
operating depth, replace coulter blade.
Figure 49
30 Series Unit-Mounted Coulter
25480
1
Hole
No.
Depth of (new) coulter blade relative
to (new) opener blades
25.4 mm (1 inch) above
15.9 mm
5
⁄
8
inch above
6.4 mm
1
⁄
4
inch above
0
9.5 mm
3
⁄
8
inch below
19 mm
3
⁄
4
inch below
5
3
2
1
6
4
Figure 50
Coulter Blade Mounting Holes
29125
1
2
3
5
1
4
6