Great Plains 3N-4025P Operator Manual - Manual (Page 130)

126 3N-40P Table of Contents Index Great Plains Manufacturing, Inc.
196-538M Table of Contents Index 2014-01-29
Uneven seed depth (cont.) Partially plugged opener seed tube. Lift up drill, expose bottom of seed tube
and clean out.
Incorrect choice of coulter. Change coulters.
Opener disks not turning
freely
Opener plugged with dirt. Clean opener.
Planting conditions too wet. Wait until drier weather.
Seed-Lok
®
is plugging opener. Lock up Seed-Lok
®
, “10 Series
Seed-Lok
®
™ Lock-Up” on page 99 or
“25 Series Seed-Lok
®
Lock-Up” on
page 121.
10 Series opener side depth wheels not
adjusted correctly.
too tight - dragging on blade
too loose - allowing dirt between
blade and wheel
See “10P Series Row Unit
Adjustments” on page 95.
10 Series opener press wheel spring
force is set too high. See “10 Series Opener Depth” on
page 99.
20 and 25 Series opener side depth
wheels not adjusted correctly.
too tight - dragging on blade
too loose - allowing dirt between
blade and wheel
See “20P Series Row-Unit
Adjustments” on page 109 or “25 Series
Row-Unit Adjustments” on page 115.
20 and 25 Series opener press wheel
spring force is set too high. See “20P Series Press Wheel
Adjustments” on page 114 or “25 Series
Press Wheel Adjustments” on
page 122.
Too much blade-to-blade contact. See “20P Series Disk Blade
Adjustments” on page 111 or “25 Series
Disk Blade Adjustments” on page 119.
Failed disk bearings. Replace disk bearings.
Bent or twisted opener frame. Replace opener frame.
Partially plugged opener seed tube. Lift up drill, expose bottom of seed tube
and clean out.
Press wheels not
compacting the soil as
desired Too wet or cloddy. Wait until drier weather or rework ground.
Coulter set too shallow. Check coulter adjustment in hitch
operator’s manual.
10 Series Openers - incorrect press
wheel depth setting. See “10 Series Opener Depth” on
page 99.
Opener spring pressure too high. Reduce opener spring pressure.
10HD Series Openers - not enough
pressure on press wheels. See “10HD Row Unit Down Pressure”
on page 103.
20 and 25 Series Openers - not enough
pressure on press wheels. See “20P Series Row-Unit Down
Pressure” on page 110 or “25 Series
Row Unit Down-Pressure” on page 116.
Problem Cause Solution