Great Plains 3PYPA Operator Manual - Manual (Page 94)

90 3PYPA Table of Contents Index Great Plains Manufacturing, Inc.
401-647M Table of Contents Index 03/20/2012
Metadata: End of “Population Too Low“
Low
Population,
One
Section Clutch slipping, due to contaminants in
clutch, or wear Lock-up clutch (page 46) until it can be overhauled or
replaced
Skipping chain from drive to section Check chain slack.
Replace worn chain.
Low
Population,
Single Row Shutter opening too wide - interfering with
meter pressurization Adjust shutter to lower setting.
Shutter opening too narrow - starving meter
of seed (low seed pool) Adjust shutter to higher setting.
Y-tube partially or completely closed, reduc-
ing bulk flow to meter or causing bridging Open Y-tube for row
Meter starvation due to bridging at shutter Re-adjust for shutter bridging (page 77).
If seed is treated, increase seed lubricant.
Meter starvation due to bridging above inlet,
caused by low seed delivery air flow Clear bridge (page 77). Check that seed delivery sys-
tem is getting sufficient fan air, and that there are no
other obstructions upstream.
Meter starvation due to bridging above inlet,
caused by high levels of seed treatment Clear bridge (page 77). Increase seed lubricant.
Low
Population,
Single
Row, cont. Skips due to low meter pressurization at one
or several rows Check shutter setting.
Check for excess wear on seed drop brush.
Check for loose or leaking pressure hose.
Skips due to skipping chain Check for worn chain, worn idlers, and low chain slack
(page 120).
Skips due to debris in disk pockets Remove rain covers. Inspect and clean out disks.
Row has blank disk installed Replace with seeding disk.
Seed sensor obscured Clean out seed tube (see page 103).
Seed tube plugged Raise planter, expose bottom of seed tube and clean
out.
Population Too Low
Problem Cause Solution