Great Plains 2525A Operator Manual User Manual
Page 63
Great Plains Manufacturing, Inc.
Troubleshooting
59
2013-06-04
118-999M
Overall
Low
Population,
cont.
Excess field speed
Plant within speed ranges recommended in Seed Rate
Manual.
(option) Incorrect speed sensor constant.
Perform speed calibration per seed monitor manual.
(option) Incorrect magnetic speed sensor
gap.
(option) Incorrect radar speed sensor angle. With planter lowered, check radar speed sensor angle
per DICKEY-john® recommendations.
Pass gaps too large
Check marker extension (page 100).
For GPS, check planter size programmed.
Actual field size is different
Population may be correct, and calculations are not.
Acremeter reporting excess distance
Acremeter readings are not 100% precise. The meter
programming is based on an average swath for the drill
size (and never accounts for swath changes if rows are
shut down). Readings also vary with conditions (tire
slippage, and effective rolling radius in soft soils) and
planting patterns. Also check that acremeter is correct
model and programming for drill. See table on
page 26.
Low
Population,
One
Section
Drive setup not identical between sections
Match sprocket assignments on both ground drives
Skipping chain from drive to section
Check chain slack.
Replace worn chain.
Tire problems
Check and match tire inflation.
If a tire is seriously worn, replace both.
Tire slippage on one section
Raise drill and rotate gauge wheels. If one section has
high resistance to turning, locate and correct binding
problem (such as: failed bearing, damaged shaft,
insufficient chain slack, fouled meter).
Low
Population,
Single Row
Shutter opening too narrow - starving meter
of seed (low seed pool)
Adjust shutter to higher setting.
Meter starvation due to bridging at shutter
Re-adjust for shutter bridging (page 47).
If seed is treated, increase seed lubricant.
Meter starvation due to blockage above inlet Clear blockage (page 47).
Meter starvation due to bridging above inlet,
caused by high levels of seed treatment
Clear bridge (page 47). Increase seed lubricant.
Incorrect seed disk on one row
Install correct seed disk.
Chain skipping at row unit.
Check chain, idler and sprocket condition.
Skips due to low meter pressure 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, low chain slack
(page 72) and failed meter bearing.
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 tube plugged
Raise drill, expose bottom of seed tube and clean out.
Population Too Low
Problem
Cause
Solution