Great Plains 2420P Operator Manual - Manual (Page 47)

2012-04-17 118-769M
45 Troubleshooting
Uneven seed depth (cont’d) 20 Series Opener side depth wheels
are set too deep for soil conditions or
coulter depth. Check 20 Series Opener adjust-
ments, page 27.
20 Series Opener press wheel spring
force is set too high. Check 20 Series Opener adjust-
ments, page 27.
Incorrect spring pressure on openers. Correct spring pressure, page 25 or
page 27.
Seed-Lok building up with dirt. Lock up Seed-Lok, page 42.
Engage Seed-Lok in dry conditions,
page 42.
Damaged or missing seed flaps. Replace seed flaps.
Damaged opener seed tube. Check disk spreader, page 55.
Partially plugged opener seed tube. Lift up drill, expose bottom of seed
tube and clean out.
Incorrect choice of coulter. See hitch operator’s manual.
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, page 42.
Drill frame height incorrect. Check drill frame height, page 17.
Drill not level front-to-back in the
field. Readjust top link to level drill.
20 Series Opener side depth wheels
not adjusted correctly.
too tight - dragging on blade
too loose - allowing dirt between
blade and wheel
Check 20 Series Opener adjust-
ments, page 27.
20 Series Opener press wheel spring
force is set too high. Check 20 Series Opener adjust-
ments, page 27.
Too much blade-to-blade contact. Take shims under head of bolt and
put between opener and disk bearing,
see page 55 for information.
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.
Problem Cause Solution