Great Plains 1625AHL Operator Manual User Manual
Page 97
Great Plains Manufacturing, Inc.
Troubleshooting
93
2014-04-21
411-020M
Seed Population Too High
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. See
“Air Systems General Operating Information” on
page 52.
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
1
⁄
4
inch sample lines from the row units
up to the sensor chamber for leaks (page 90).
• Make sure all non-planting rows have blank disks and
shutters are closed (page 83).
• Re-zero the gauge with the fan off (page 90).
• Check gauge vent line for kinks, pinches or plugging
(page 90).
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.
(Option) Incorrect radar speed sensor
angle.
With planter lowered, check radar speed sensor angle
per DICKEY-john
®
recommendations.