YP625PD
Troubleshooting
65
06/12/2019
401-754M
Population Troubleshooting Charts
Population Too Low
Problem
Cause
Solution
Overall Low
Population
Incorrect seed rate
Using
Seed Rate Manual
, check:
•
seed disk selection,
•
Range/Transmission sprocket setup, and
•
tire size and inflation.
Empty pockets on disk (skips) due to insufficient
air pressure.
Methodically increase the meter pressurization.
Empty pockets on disk (skips) due to sticky seed
treatments not allowing seed to rapidly fill the
pockets.
Increase seed lubricant.
Empty pockets on disk (skips) due to rough field
conditions causing seeds to fall from the disks.
Decrease field speed or increase the air pressure in the
meter.
Empty pockets on disk (skips) due to seed pool
too low, and seeds are not filling every pocket on
the disk.
Open shutter one notch.
Empty pockets on disk (skips) due to disk speed
too high, and pockets are not filling.
Decrease field speed or change to a higher cell count disc.
Empty pockets on disk (skips) due to singulation
(4 tufted) brush too aggressive.
Check for matted, stuck together fibers. Wash, scrape clean,
or replace as needed.
Empty pockets on disk (skips) due to seed too big
for pocket.
Select the correct disk for the seed size.
Seeds are not falling from disk, and get carried
past drop zone. Static electricity can cause small,
lightweight seeds to cling to the pocket and not
fall out.
The graphite component of Ezee Glide Plus addresses this
issue. Increase the amount of Easy Glide Plus and/or more
thoroughly mix the lubricant into the seed.
Air pressure too low, as confirmed by gauge.
Increase fan speed or reduce butterfly valve setting.
Air pressure too low, but gauge reading is within
range or reading high.
•
Inspect the 6.4 cm sample lines from the row units
up to the sensor chamber for leaks (page 64).
•
Make sure all non-planting rows have blank disks
and shutters are closed (page 57).
•
Re-zero the gauge with the fan off (page 64).
•
Check gauge vent line for kinks, pinches or
plugging (page 64).
Excess field speed
Plant within speed ranges recommended in
Seed Rate
Manual
.
Incorrect speed sensor constant.
Perform speed calibration per seed monitor manual.
Incorrect magnetic speed sensor gap.
Check and adjust (page 78).
(Option) Incorrect radar speed sensor angle.
With planter lowered, check radar speed sensor angle per
DICKEY-john
®
recommendations.
Overall Low
Population,
cont.
Pass gaps too large
Check marker extension (page 110).
For GPS, check planter size programmed.
Actual field size is different
Population may be correct, and calculations are not.
Seed monitor reporting excess area
Readings can vary with conditions (wheel slippage, and
effective rolling radius in soft soils) and planting patterns.