Great Plains 1520P Operator Manual - Manual (Page 60)

1510P and 1520P
118-732M 5/6/2010
58
Opener Disks
1.
On 20 Series openers, remove side gauge
wheel arm & wheel assembly by removing
5/8 inch bolt (4) to access opener disks and
spreaders.
2. Check disk blades for wear.
Refer to Figure 71
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.
Refer to Figure 72
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.
Opener Disk Spreader
Refer to Figure 70 on page 57
1. On 20 Series openers, remove side gauge
wheel arm & wheel assembly by removing
5/8 inch bolt (4) to access opener disks and
spreaders.
2. With the unit raised, check blade spreader (1)
for wear. Replace spreader if it is
7 ⁄
16
inch
wide or narrower, or if opener is plugging with
dirt. To replace, remove disk blade (3). Drive
out roll pins (2) and install a new spreader.
NOTE: Disk spreaders are loose to move free-
ly.
Figure 72
Opener disks contact point
1/2 inch to
1 3/4 inches
18412
Figure 71
Disk Spreader
20433