Population too high ” in the troub, Population too high – Great Plains YP4425A Operator Manual User Manual
Page 90
86
YP4425A
Great Plains Manufacturing, Inc.
401-805M
2012-02-23
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 107).
Skips due to debris in disc pockets
Remove rain covers. Inspect and clean out discs.
Row has blank disc installed
Replace with seeding disc.
Seed sensor obscured
Clean out seed tube (see page 96).
Seed tube plugged
Raise planter, expose bottom of seed tube and clean
out.
Population Too Low
Problem
Cause
Solution
Population Too High
Problem
Cause
Solution
Overall High
Population
Incorrect seed rate
Check seed rate charts
Two seeds per pocket on the disc
(doubles), due to excess meter
pressurization
Methodically decrease the controlled air to the meter. See
“Fan and Adjustment” on page 60.
Two seeds per pocket on the disc
(doubles), due to pockets too large
for the seed
Select a disc with smaller pockets.
Air meter pressure too high due to
pressure sensor not zeroed properly.
Re-zero the air pressure with the fan off. Make sure the
displayed pressure reads 0.00.
Air pressure too high, false
information driving the
DICKEY-john
®
software.
Compare the air pressure reported on the monitor console to
the mechanical gage. If they do not match:
• Inspect the
1
⁄
4
inch sampling lines from the row units up to
the sensor chamber for leaks.
• Re-zero the air pressure with the fan off.
False alarms or actual seed rate
errors due to monitor setup with
incorrect row count, spacing or
active rows
When troubleshooting population issues, always first rule out
seed monitor setup. Review planter configuration and
monitor setup.
Incorrect cell count
Replace seed discs with correct discs, or reset rate for
current discs (if within range).
Incorrect speed sensor constant
Perform speed calibration per DICKEY-john
®
monitor
Doubles due to incorrect disc for
crop or seed size
Use recommended disc for crop and seed size.
Sticky seeds: excess seed treatment Increase seed lubricant.