Great Plains 3N-4025P Operator Manual - Manual (Page 76)

3N-4010P, 3N-4015P, 3N-4020P and
3N-4025P
196-286M 4/23/2010
74
Seed Tube Maintenance
Refer to Figure 106
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 107
To replace inner sliding seed tube, follow these
steps:
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, see Figure 107. The out-
er sliding seed tube must extend above the
rubber grommet by 3/8” for 10, 15 and 20 se-
ries openers and by 3/4” for 25 series openers
with finger pickup corn meters, see insert.
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.
18298
Outer sliding
seed tube
Inner sliding
seed tube
Figure 106
Figure 107
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