Great Plains 3N-4025P Operator Manual - Manual (Page 156)

152 3N-40P Table of Contents Index Great Plains Manufacturing, Inc.
196-538M Table of Contents Index 2014-01-29
10HD Opener Maintenance
10HD Disk Spreader-Scraper
Refer to Figure 211
To perform this inspection (and replacement), it may be
necessary to remove one or both opener disk blades.
1. With unit raised, remove bolt holding on one or
both blades.
Note: Keep the spacer washers on the outside of the
disk on the bolt. Do not misplace the spacers on
the insider of the disk. They control disk-to-disk
contact.
2. Check blade spreader for wear. Replace spreader
assembly if the lower section ahead of the seed
tube bracket is
1 ⁄
2
inch (13 mm) thick or narrower.
3. To replace, remove seed tube , drive out roll
pins and install new spreader.
4. When reinstalling disk blades, put spacers back on in
same order as removed.
Note: It is normal for blade spreader to have some
looseness in the holder and between the blades.
Some looseness is required for proper operation.
20 Series Opener Maintenance
20 Series Side Gauge Wheels
Refer to Figure 212
1.
Lift opener side wheel off the ground. Move tire in
and out to check for end play. Check for roughness in
bearing by rotating wheel. If the bearings are rough,
inspect and replace if necessary.
2. Check for the correct number of flat washers and
machine washer between the side gauge
wheel and the wheel arm . There must be three
flat washers and one machine washer between
the wheel bearing and arm with the machine
washer
next to the arm. There should be three flat
washers and one lock washer on the outside of
the wheel. When installed, the wheel should turn
freely and not hit the arm at the curve. Do not add
any more washers than necessary.
3. Disassemble side-gauge-wheel arm from unit.
Remove bushing
from sleeve and check
bushing for wear. Replace bushing if necessary.
4. When reinstalling side gauge wheels, align tab on
hex adjustment
with notch in bushing. Replace
bolt and tighten.
Figure 211
10HD Spreader/Scraper
27228
3
2
1
4
5
6
7
1
2
3
4
5
6
7
Figure 212
20 Series Side Depth Wheel
20432
1
2
3
2
4
5
6
7
8
9
1
2
3
1 4
2 3
3
2 5
6 7
8