Great Plains 3N-4025P Operator Manual - Manual (Page 80)

3N-4010P, 3N-4015P, 3N-4020P and
3N-4025P
196-286M 4/23/2010
78
15, 20 and 25 Series Opener Disks
Refer to Figure 114
1. On the 15, 20 and 25 Series openers, remove
side gauge wheel arm and wheel assembly
by removing 5/8 inch bolt (4) to access open-
er disks and spreaders.
2. Check disk blades for wear.
3. When reinstalling disk blades, put two shims
(4) between bearing and shank on one blade
and two shims under bolt. Tighten bolt. On
opposite side, reinstall blade with two shims
between bearing and shank and two shims
under bolt. Tighten bolt.
4. Check contact point between disk blades.
Place a piece of paper in top gap between
disk blades. Bring paper down until it stops. In
lower gap place another piece of paper. Bring
paper up until it stops. The distance must be
between 1/2 and 1 3/4 inches. Add or remove
shims as needed to get the correct contact
point.
Disk edges are sharp. Be careful when working in this
area.
1/2 inch to
1 3/4 inches
18412
Figure 114