Great Plains YP4425A Operator Manual - Manual (Page 112)

108 YP4425A Table of Contents Index Great Plains Manufacturing, Inc.
401-805M Table of Contents Index 2012-02-23
Spreaders and Scrapers
Note: Applies to all row unit Series.
Refer to Figure 132
1.
Remove side gauge wheels from arms to access
row-unit discs and scrapers.
2. With the unit raised, check blade spreader for
wear. Replace spreader if it is
1 ⁄
2
inch (13 mm) wide
or narrower. To replace, remove disc blades , drive
out roll pins , and install new spreader.
3. When reinstalling disc blades, put two shims
between bearing and shank on each blade. Tighten
bolts.
4. Check amount of contact between blades, and adjust
number of shims as needed. Store extra shims on
outside of blade. See “Opener Disc Contact
Region” on page 72.
5. Check that outside disc scrapers are formed to
disc blades to help remove any mud. Bend/twist
scrapers to fit blades as needed. Every 200 acres of
operation, check outside scrapers for adjustment
and wear. Replace outside scrapers as necessary.
Row-Unit Side Wheels
Refer to Figure 133
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 bearings are rough,
inspect and replace if necessary.
2. Side wheels are preset at the factory. Due to normal
wear it may become necessary to make adjustments
so the wheel remains close to the disc. To prevent
plugging, loosen clamp bolt
and slide arm inward
to take up gap between side wheel and disc blade. If
more adjustment is needed, go to step 3.
3. Remove bolt and wheel . Remove shims
from the inside of wheel and place them on the
outside of wheel. Always place removed shims from
the inside to the outside. When installed, wheel
should turn freely and not hit the arm at the curve.
Do not add any more shims than necessary.
4. Disassemble side gauge wheel arm from unit.
Remove bushing from sleeve and check for
wear. If necessary, replace bushing.
5. When reinstalling side gauge wheels, align tab on
hex adjustment
with notch in bushing. Replace
bolt and tighten.
6. Adjust side gauge wheels. Refer to see “Side Gauge
Wheel Adjustment” on page 73.
Note: You may need fewer washers under worn discs.
Figure 132: 25AP
Spreaders and Scrapers
22839
Note: It is normal for the blade spreader to have some
looseness in the holder and between the blades.
Some looseness is required for proper operation.
1
3
2
4
5
3
4
1
3
2
4
5
Sharp Object Hazard:
Be careful when working in this area. Disc edges are sharp.
Figure 133
Side Gauge Wheel Shims
21894
{
4
2
3
8
1
7
6
5
4
1
2 3 4
3
5
6 7
8