Great Plains 3PYPA Operator Manual - Manual (Page 108)

104 3PYPA Table of Contents Index Great Plains Manufacturing, Inc.
401-647M Table of Contents Index 03/20/2012
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 127
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 popula-
tions.
If an obvious groove is worn in the drop brush, replace
it.
Null4:
Figure 127
Brushes
29608
5
6
7
5
6
7