Troubleshooting, General drill troubleshooting, Troubleshooting general drill troubleshooting – Great Plains 3N-4020 Operator Manual User Manual
Page 94
196-359M
2013-10-29
90
3N-4010F/3N-4010HDF/3N-4020F
Great Plains Manufacturing, Inc.
Troubleshooting
General Drill Troubleshooting
Problem
Cause
Solution
Planting too much
Incorrect seed rate.
Check seed rate setup and calibration,
page 29.
Seed cup door not correctly set for seed
size.
Adjust seed cup doors, page 29.
Actual field size is different.
Verify field size.
Excessive overlap.
Irregular shaped field.
Adjust marker, page 18.
Planting too little
Incorrect seed rate.
Check seed rate setup and calibration,
page 29.
Excessive field speed.
Reduce field speed.
Seed cup door not correctly set for seed
size.
Adjust seed cup doors, page 29.
Oil in electric clutch causing slippage
Disassemble and degrease clutch.
Check seed level in seed box.
Fill seed box.
Actual field size is different.
Verify field size.
Excessive gaps between drill passes.
Adjust marker, page 18.
Build up of seed treatment in seed cups. Clean out seed cups.
Plugged opener seed tube.
Lift drill, expose bottom of seed tube and
clean out.
Obstruction in seed cup from foreign mat-
ter or unclean seed.
Clean seed cup.
Thrown or worn drive chains
Check drive chains.
Worn sprockets and/or chain idlers.
Replace sprockets and/or chain idlers.
Uneven seed spacing.
Excessive field speed.
Reduce field speed.
Unclean seed.
Use clean seed.
Build up of seed treatment in seed cup.
Clean out seed cup.
Seed-Lok plugging.
Lock up Seed-Lok, pages 74, 82, 88.
Damaged or missing seed flap.
Replace seed flap.
Opener disks not turning.
See “Opener disks not turning freely” in
this Troubleshooting chart.
Plugged opener seed tube.
Lift up drill, expose bottom of seed tube
and clean out.
Worn/rusted sprockets and/or chain idler. Check and replace any worn/rusted
sprockets or chain idlers.
Opener not penetrating low spots.
Adjust opener, pages 71, 78, 85.
Drive type too slow.
Use faster drive type and readjust seed
rate handle.
Seed cup door setting too open.
Close flutes to a more narrow position.