Great Plains 3N-3020P Operator Manual - Manual (Page 61)

4/23/2010 196-248M
59 Maintenance and Lubrication
Seed Tube Maintenance
Refer to Figure 57
Clean inner sliding seed tube if it will not slide. Re-
place inner sliding seed tube if you see any visible
cracks.
Sliding Seed Tube Replacement
Refer to Figure 58
To replace inner sliding seed tube, follow these
steps:
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Outer sliding
seed tube
Inner sliding
seed tube
1. Make sure seed box is empty.
2. Loosen bottom clamp (1).
3. Pull inner sliding seed tube (2) out of seed
meter grommet and pull inner tube down and
out of outer sliding seed tube (3).
4. Inspect outer sliding seed tube for wear and
replace if necessary. Loosen top clamp (4)
and pull outer sliding seed tube from seed box
grommet.
5. Fit new outer sliding seed tube into seed box
grommet. The distance from seed box grom-
met lip to the top of the clamp should be no
more than 3/16 inch. Tighten clamp (4).
6. Place new inner sliding seed tube inside outer
sliding seed tube. Make sure the chamfer on
the inside of the tube is up as shown.
7. Fit inner sliding seed tube into seed meter
grommet and tighten clamp.
8. Replace inner sliding seed tube inside outer
sliding seed tube as shown, fit into seed
meter grommet and tighten clamp (1).
Grommet Maintenance
Periodically check seed meter and seed box
grommets for weathering or cracking and replace
as necessary. Check sliding seed tubes at this
time to make sure they slide freely.
Figure 57
Figure 58
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