Great Plains 2420 Operator Manual - Manual (Page 28)

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Section 4 Troubleshooting
2400, 2410 and 2420 Three-Point Drill 118-706M 5/15/06
Great Plains Mfg., Inc.
Section 4
Troubleshooting
Problem Solution
Uneven seed spacing or uneven stand Check for plugging in seed cups.
Check for plugging in seed tubes.
Reduce ground speed.
Check if opener disks are turning freely.
Use faster drive type and position seed-rate handle to a lower setting.
Increase opener spring pressure to penetrate low spots. Refer to Opener
Down Pressure, “Adjustments,” page 15.
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.
Opener disks not turning freely Check for trash or mud build-up on disk scraper. Adjust scraper. Refer to
Disk Scraper Adjustment, “Adjustments,” page 24.
Check if scraper is too tight, restricting disk movement. Refer to Disk
Scraper Adjustment, “Adjustments,” page 24.
Check disk bearings.
Check opener frame for damage.
If opener disks turn freely by hand but not in field, reduce down pressure on
disk opener. Refer to Opener Down Pressure, “Adjustments,” page 15.
Check press wheel adjustment. Refer to Opener Depth, “Adjustments,” page
16.
Actual metering rate is different than
desired Check tire pressure. Proper inflation is listed on Tire Inflation Chart,
“Appendix,” page 34.
Check tire size. Proper size is 11L x 15.
Regularly clean seed treatment from seed cups.
Check seeding rate. Refer to Seeding Rate, “Adjustments,” page 17, for
instructions on calibrating seeding rates.
Consider your seed weight. Seed-rate charts are based on average seed
weights.
Acremeter does not measure accurately Check tire pressure. Proper inflation is listed on Tire Inflation Chart,
“Appendix,” page 34.
Check tire size. Proper size is 11L x 15.
Check planting operation for excessive overlap or gaps between passes.
Consider soil conditions. Loose soil and slippage will cause variations in
acres registered.
Check that acremeter is for your width of drill. Refer to drill parts manual.
Acremeters are accurate within a 5 percent range.
Press wheels not compacting the soil as
desired On 00 and 10 Series openers, reset press-wheel depth. Refer to Opener
Depth, “Adjustments,” page 16. On 20 Series openers, adjust press-wheel
spring. Refer to Opener Down Pressure, “Adjustments,” page 15.
Increase down pressure on disk openers. Refer to Opener Down Pressure,
“Adjustments,” page 15.