3PYPA
Table of Contents
Index
Maintenance and Lubrication
Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
105
Seed Tube Clean-Out
The seed sensor in the seed tube can be obscured by
build-up of dust, dirt and seed treatments. This can
cause false low population alarms.
The planter includes a seed tube brush (Great Plains
part number 891-259C). If the seed meter is empty,
remove the seed disc and insert the brush into the seed
tube
from above. With the planter raised, you can also
insert the brush from below, whether the meter is empty
or not.
Meter Brush Maintenance
Possible Chemical Hazard:
Wear a respirator for brush cleaning. Brushes will have talc
and graphite residue, and may have residues of hazardous
seed treatments.
Refer to Figure 132
A HEPA vacuum cleaner is recommended for brush
cleaning. Washing brushes is not recommended and
may cause matting. Do not scrape them with sharp
instruments.
The first indications of excess brush or damage wear are
normally observed on the seed monitor or in air system
operation.
•
If the tufted brushes
are worn/damaged, the seed
“double” rate rises, increasing population.
Finding an occasional cracked seed “hung up” on a
tuft fiber is not uncommon, and is not an indicator
that brush maintenance is required. Merely remove
the seed.
•
If the strip brushes
are worn/damaged, air
pressure regulation may become unstable, or
require increasing fan speed over time.
If you find you need to exceed recommended fan
rpm ranges, the regulated air system may be taking
too much air due to meter leakage.
In severe cases, seed may leak past the strip
brushes, causing spikes in population. If you
frequently observe seed in between the strip
brushes, one or both may need replacement.
•
If the seed drop brush
is worn/damaged, its
anti-static effect may fade, which can result in “skips”
due to smaller seeds failing to release, and lower
populations.
If an obvious groove is worn in the drop brush,
replace it.
4
Figure 132
Brushes
29608
5
6
7
5
6
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