Great Plains 2525P Operator Manual - Manual (Page 65)

Great Plains Manufacturing, Inc. Maintenance and Lubrication 61
2013-05-10 118-231M
Seed Tube Maintenance
Clean inner sliding seed tube 1 if it will not slide.
Replace inner sliding seed tube if you see any visible
cracks.
Sliding Seed Tube Replacement
Refer to Figure 76 and Figure 77
To replace inner sliding seed tube, follow these steps:
1. Make sure seed box is empty.
2. Loosen bottom clamp .
3. Pull inner sliding seed tube out of seed meter
grommet and pull inner tube down and out of
outer sliding seed tube .
4. Inspect outer sliding seed tube for wear and
replace if necessary. Loosen top clamp and pull
outer sliding seed tube from seed box grommet .
5. Fit new outer sliding seed tube into seed box
grommet . Set the distance from seed box
grommet lip to the top of the clamp to:
3 ⁄
16
in (4.7mm).
6. Set the reveal of the outer sliding seed tube
above the rubber grommet to:
20 Series minimum: 1 ⁄
4
in (6.4mm)
20 Series maximum: 3 ⁄
8
in (9.5mm)
25 Series minimum: 1 ⁄
2
in (12.7mm)
25 Series maximum: 5 ⁄
8
in (15.8mm)
Tighten clamp .
7. Place new inner sliding seed tube inside outer
sliding seed tube . If the replacement tube is
chamfered on only one end, make sure the chamfer
on the inside of the tube is up as shown.
8. Fit inner sliding seed tube into seed meter grom-
met and tighten clamp .
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 76
Seed Tubes
18290
1
2
4
3
1
2
1
3
4
Figure 77
Seed Tube Components
22834
5
2
1
4
5
6
4
8 7
4
5
6
4
6 7
5
8 4
6
5
1
4
1
3 2