Troubleshooting – Great Plains 3PNG15 Operator Manual User Manual
Page 33
10/06/2008
202-553M
Great Plains Manufacturing, Inc.
Troubleshooting
29
Troubleshooting
Problem
Cause
Solution
Uneven seed spacing or
uneven stand
Excessive field speed.
Reduce field speed.
Feed cups plugging.
Clean out feed cups.
Seed tubes plugging.
Clean out seed tubes.
Opener discs not turning freely.
See “Opener discs not turning freely” in this Trouble-
shooting section.
Ground drive wheel slippage
Check tire size/pressure, then frame height. Solution
may require drier conditions.
Seed cups too wide
Use faster Drive Type speed and close feed cup flutes
to a more narrow position.
Chain skipping.
Check chain slack and wear.
Mud build-up on Seed-Lok wheel
Lock-up Seed-Lok (page 28) or wait for drier condi-
tions.
Uneven seed depth
Excessive field speed.
Reduce field speed.
Planting conditions too wet.
Wait until drier weather.
Drill not level
Insufficient down-force at rows
Increase spring setting, page 27.
Opener discs not
turning freely
Trash or mud build up on disc scraper.
Adjust scraper, page 27.
Scraper adjusted too tight, restricting
movement.
Adjust scraper, page 27.
Failed disc bearings.
Replace disc bearings.
Bent or twisted opener frame.
Replace opener frame.
Planting conditions too wet.
Wait until drier weather.
Too much opener down pressure.
If opener discs turn freely by hand but not in field,
reduce down pressure, page 27.
Incorrect press wheel adjustment.
Readjust press wheel, page 28.
Actual material rate
different than desired
Incorrect frame height
Check frame height (page 24).
Incorrect tire pressure or size.
Check tire inflation and tire size.
Build up of seed treatment in feed cup.
Clean out seed treatment from feed cups.
Incorrect rate adjustment.
Check gearbox, sprocket, seed-rate handle and seed
door settings. Perform calibration if not already done.
Excessive seed
cracking
Seed cup too narrow.
Use lower Drive Type and higher scale.
Excessive field speed.
Reduce field speed.
Feed cup flutes not open enough.
Open feed cups to a wider position.
Feed cup door handle not open enough.
Open feed cup door handle to a lower position.
Press wheels not
compacting soil as
desired
Too wet or cloddy.
Wait until drier weather or rework ground.
Press wheel depth setting too deep.
Readjust press wheel depth, page 28.
Not enough down pressure on disc open-
ers.
Increase down pressure on openers, page 27.