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

8/14/2006
45 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 25.
Check for trash or mud build-up on Seed-Lok wheels.
Opener disks not turning freely Check for trash or mud build-up on disk scraper. Adjust scraper.
Refer to HD 10 Series Disk Spreaders and Scrapers, “Maintenance,”
page 50.
Check if scraper is adjusted too tight, restricting disk movement.
Refer to HD 10 Series Disk Spreaders and Scrapers, “Maintenance,”
page 50.
Check disk bearings.
Check opener frame for damage.
If opener disks turn freely by hand but not in field, reduce down pres-
sure on disk opener. Refer to Opener Down Pressure, “Adjustments,”
page 25.
Check press wheel adjustment. On HD10 Series Openers, refer to
Opener Seeding Depth, “Adjustments,” page 30. On 20 Series Open-
ers, refer to Opener Down Pressure, “Adjustments,” page 26.
Actual metering rate is different than
desired Check tire pressure. Proper inflation is listed on the Tire Inflation
Chart, “Appendix,” page 57.
Check tire size. Proper size is 9.5L x 15 for 15 foot drills and 11L x 15
for 20 foot drils and 24 foot drills.
Regularly clean seed treatment from seed cups.
Check drill box setting.
Refer to Seeding Rate, “Adjustments,” page 34.
Acremeter does not measure accurately Check tire pressure. Proper inflation is listed on the Tire Inflation
Chart, “Appendix,” page 57.
Check tire size. Proper size is 9.5L x 15 for 15 foot drills and 11L x 15
for 20 foot and 24 foot drills.
Check planting operation for excessive overlap or gaps between
passes.
Consider soil conditions. Loose soil and slippage will cause varia-
tions in acres registered.
Check that acremeter is correct for width of drill. Refer to the parts
manual.
Press wheels not compacting the soil as
desired Reset press wheel depth. On HD10 Series Openers, refer to Opener
Seeding Depth, “Adjustments,” page 30. On 20 Series Openers, refer
to Opener Down Pressure, “Adjustments,” page 26.
Increase down pressure on disk openers. Refer to Opener Down Pres-
sure, “Adjustments,” page 26.
Troubleshooting