196-366m
Maintenance and Lubrication
Great Plains
| | 4/22/19
53
Opener Maintenance
20 Series Opener Side Wheels
Refer to Figure 39
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 (1) and
machine washer (8) between the side gauge wheel
(2) and the wheel arm (3). There must be three flat
washers (1) and one machine washer (8) between
the wheel bearing and arm with the machine washer
(8) next to the arm. There should be three flat
washers (1) and one lock washer (9) 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 (4) from sleeve (5) and check
bushing for wear. Replace bushing if necessary.
4. When reinstalling side gauge wheels, align tab on
hex adjustment (6) with notch in bushing. Replace
bolt and tighten.
5. To prevent plugging loosen clamp bolt (7) and slide
arm inward to take up gap between side wheel and
disk blade.
6. Adjust side gauge wheels. Refer to “Adjustments,”
Opener Disks
Refer to Figure 40
1. On 20 Series openers, remove side gauge wheel
arm and wheel assembly by removing
5/8 inch bolt (4) to access opener 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.
Disk edges are sharp. Be careful when working in this area.
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.
19101
20432
Figure 39
19101
20432
1/2 inch to
1 3/4 inches
Figure 40