Great Plains 2525P Operator Manual - Manual (Page 38)

34 2020P/2025P and 2520P/2525P Great Plains Manufacturing, Inc.
118-231M 2013-05-10
25 Series Coulter Adjustments
Note: Coulters are not factory-installed. Check align-
ment and depth prior to first use.
Coulter Depth Adjustment
The ideal operating depth for coulters is 1 ⁄
4
in 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 38 and Figure 39
Raise drill before working on coulters. Row unit may be
fully lowered or locked up. 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. 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
1 ⁄
4
in-above depth. See the table below.
4. Remove the 5 ⁄
8
-11 x 4in bolt, lock washer and nut (
in Figure 38).
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 oper-
ating depth, replace coulter.
Hole
No.
Depth of (new) coulter blade relative
to (new) opener blades
1in above
5 ⁄
8
in above
1 ⁄
4
in above
0
3 ⁄
8
in below
3 ⁄
4
in below
Figure 38
25 Series Unit-Mounted Coulter
22817
7
Figure 39
Coulter Blade Mounting Holes
23288
1
2
5
4
3
6
7
2
3
5
1
4
6