Great Plains YP1630F-1670 Operator Manual User Manual
Page 71
Great Plains Manufacturing, Inc.
Troubleshooting
67
2012-12-27
401-832M
Seed Population Too High
Problem
Cause
Solution
Overall High
Population
Incorrect seed rate
Check seed rate charts
Ground Drive only: Incorrect Transmission
sprockets or shafts used
Check Transmission sprocket tooth counts and
Driver/Driven locations.
Ground Drive only: Incorrect Range
sprockets or shafts used
Check Range sprocket tooth counts and Driver/Driven
locations.
Finger Meter: Two seeds per finger
(doubles) due to seed too small.
Consult with dealer regarding alternate inserts.
Consider also switching to brush meters.
Finger Meter: Check carrier plate for wear.
Finger Meter: Check for weak finger
springs.
Brush Meter: Empty pockets on plates due
to matted brush.
Brush Meter: Two seeds per pocket on the
plates (doubles), due to pockets too large
for the seed
Select plates with smaller pockets.
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).
Improper gap on speed sensor.
Check speed sensor on planter for
1
⁄
16
inch to
1
⁄
8
inch
(1.6 to 3.2 mm) gap from wheel. Improper gap can
cause erratic speed signal causing monitor to falsely
report improper planting rate.
Incorrect speed sensor constant
Perform speed calibration per DICKEY-john
®
monitor
manual.
Brush meter: Doubles due to incorrect
plates for crop or seed size
Use recommended plates for crop and seed size.
Sticky seeds: excess seed treatment
Increase seed lubricant.
High
Population,
One Wing
Ground Drive only: LH and RH Range
setup not matched.
Make sure LH and RH Range settings are identical, and
that sprockets are on proper DRIVING/DRIVEN shafts.
Ground Drive only: LH and RH
Transmission setup not matched.
Make sure LH and RH Transmission settings are
identical, and that sprockets are on proper
DRIVING/DRIVEN shafts.
High
Population,
Single Row
Incorrect seed plate with higher cell count. Install correct plate.
Brush Meter: Worn brushes allowing
excess seed to pass
Replace worn brushes.