3PYPA
Table of Contents
Index
Troubleshooting
Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
93
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, reducing
bulk flow to meter or causing bridging
Open Y-tube for row
Meter starvation due to bridging at shutter
Readjust for shutter bridging (page 80).
If seed is treated, increase seed lubricant.
Meter starvation due to bridging above inlet,
caused by low seed delivery air flow
Clear bridge (page 80). Check that seed delivery system 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 80). Increase seed lubricant.
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 121).
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 105).
Seed tube plugged
Raise planter, expose bottom of seed tube and clean out.
Problem
Cause
Solution
Problem
Cause
Solution
Overall High
Population
Incorrect seed rate
Check seed rate charts
Two seeds per pocket on the disk
(doubles), due to excess meter
pressurization
Methodically decrease the controlled air to the meter. See “
Fan and
Adjustment
” on page 65.
Two seeds per pocket on the disk
(doubles), due to pockets too large for
the seed
Select a disk 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 sample lines from the row units up to
the sensor chamber for leaks.
•
Make sure all non-planting rows have blank disks.
•
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 disks with correct disks, or reset rate for current disks
(if within range).
Incorrect speed sensor constant
Perform speed calibration per DICKEY-john
®
monitor manual.
Doubles due to incorrect disk for crop or
seed size
Use recommended disk for crop and seed size.
