Great Plains 3N-4020 Operator Manual - Manual (Page 116)

112 3N-4010F/3N-4010HDF/3N-4020F Table of Contents Index Great Plains Manufacturing, Inc.
196-359M Table of Contents Index 2013-10-29
10HD Opener Maintenance
10HD Disk Spreader-Scraper
Refer to Figure 159
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
in (13mm) 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 loose-
ness 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 160
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 bush-
ing 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 159
10HD Spreader/Scraper
27228
3
2
1
4
5
6
7
1
2
3
4
5
6
7
1
2
.eps
45%
Figure 160
20 Series Side Depth Wheel
20432
3
2
4
5
6
7
8
9
1
2
3 1
4
2 3
3
2 5
6 7
8