
2018-07-30
401-805M
YP4425A
Troubleshooting
86
Population Troubleshooting Charts
Population Too Low
Problem
Cause
Solution
Overall Low
Population
Incorrect seed rate
Check seed rate charts
Empty pockets on disc (skips) due to insufficient
air pressure.
Methodically increase the controlled air to the meter. See
“
Empty pockets on disc (skips) due to sticky seed
treatments not allowing seed to rapidly fill the
pockets.
Increase seed lubricant.
Empty pockets on disc (skips) due to rough field
conditions causing seeds to fall from the discs.
Decrease field speed or increase the air pressure in the
meter.
Empty pockets on disc (skips) due to seed pool
too low, and seeds are not filling every pocket on
the disc.
Open shutter one notch.
Empty pockets on disc (skips) due to disc speed
too high, and pockets are not filling.
Decrease field speed or change to a higher cell count disc.
Empty pockets on disc (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 disc (skips) due to seed too big
for pocket.
Select the correct disc for the seed size.
Seeds are not falling from disc, 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, 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.
Low fan speed: meter starvation due to meter
pressurization, leaving insufficient air for seed
delivery
Increase fan speed.
Excess field speed
Plant within speed ranges recommended in seed rate charts.
Incorrect speed sensor constant.
Perform speed radar calibration per DICKEY-john
®
monitor
manual. See page 155.
Speed sensor angle.
With planter lowered, check radar speed sensor angle per
DICKEY-john
®
recommendations.
Pass gaps too large
Check marker extension (page 154).
For GPS, check planter size programmed.
Actual field size is different
Population may be correct, and calculations are not.
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.
Содержание YP4425A
Страница 168: ...Cover Table of Contents Cover Table of Contents...
Страница 169: ...Table of Contents Index Table of Contents Index...
Страница 170: ...Great Plains Mfg 1525 E North St P O Box 5060 Salina KS 67402...