Great Plains 2420 Operator Manual User Manual
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Section 4 Troubleshooting
5/15/06
2400, 2410 and 2420 Three-Point Drill 118-706M
Great Plains Mfg., Inc.
Excessive seed cracking
Use slower drive type and position seed-rate handle to a higher setting.
Position seed-cup-door handles to a lower notch.
Drill boxes not emptying evenly
Certain models do not have the same number of cups between each divider
of bulkhead. The section with more cups will empty sooner.
Check that you have the same drive type set on both drill boxes.
Press wheel or openers plugging
Consider soil conditions–may be too damp or wet.
Reduce down pressure on openers.Refer to Opener Down Pressure,
“Adjustments,” page 15.
Do not back up or allow drill to roll backward with openers in the ground.
Check for trash or mud build-up on Seed-Lok wheels. Lock up wheels if nec-
essary. Refer to Seed-Lok Lock Up, “Adjustments,” page 24.
Seed-cup sprockets locked up or twisted
seed-cup drive shaft
Check for foreign material stuck in the seed-cup sprockets.
Check for dried liquid insecticide in seed cups. Remove the build up by dis-
assembling seed cups and scraping the foreign substance from the turning
surfaces.
Drill is not pulling level (parallel to
ground, front to rear)
Readjust top hitch link to level drill.
Gauge wheel leans to left or right
Realign brackets where gauge wheel is attached to main frame by adjusting
u-bolts.
Check if axle bearings are securely attached to gauge-wheel arm.
Hydraulic marker functioning improperly
Check all hose fittings and connections for air or oil leaks.
Check that the chain on the folding marker is slack when the marker is both
fully extended and raised. Refer to Marker Adjustments, “Adjustments,”
page 22.
Check tractor hydraulic oil level.
Check all bolts and fasteners.
Check if needle valve is plugged. If so, open needle valve, cycle markers
slowly and reset needle valve.
Marker disk does not mark
Check that the marker folding linkage has enough slack to allow the marker
disk to drop into field depressions. Maximum down float should be limited
by the slot at the rod end of the marker cylinder – not by the chain. Refer to
Marker Adjustments, “Adjustments,” page 22.
Reverse the blade to pull or throw dirt. Refer to Marker Adjustments,
“Adjustments,” page 22.
Chain
Be sure retainer clip is facing opposite way of chain travel
Problem
Solution