Great Plains YP1625 Operator Manual - Manual (Page 69)

07/09/2009 401-226M
Great Plains Manufacturing, Inc. Troubleshooting 65
Troubleshooting
Note: For Veris Drive monitor troubleshooting
see “Veris Troubleshooting” on page 113.
Problem Cause Solution
Planting too
much
Incorrect seed rate. Check seed rate information in the Veris section beginning
on page 113.
Actual field size is different. Verify field size.
Excessive overlap.
Irregular shaped field. Adjust marker, page 41.
Incorrect tire size or air pressure. Use correct chart for tire brand and model (see Seed Rate
manual). Use correct air pressure, page 118.
Improper main shaft sprocket. Check sprockets, Veris uses 23-tooth. Conventional uses 25-
tooth.
Improper gap on speed sensor. Check speed sensor on planter for 1 ⁄
16
in to 1 ⁄
8
in gap from
wheel. Improper gap can cause erratic speed signal causing
monitor to falsely report improper planting rate. Monitor may
also falsely report a low rate on soybeans by as much as 5
percent due to difficulty in counting all of the seeds.
Meter wheel or finger pickup has
more cells than indicated on seed
rate chart. Charts are based on either 6 finger or 12 finger meters or
various wheel counts.
Planting too
little Incorrect seed rate. Check seed rate information.
Excessive field speed. Reduce field speed.
Seed size and weight may vary. Adjust seed rate handle.
Incorrect tire size or air pressure. Use correct chart for tire brand and model (see Seed Rate
manual). Use correct air pressure, page 118.
Actual field size is different. Verify field size.
Excessive gaps between planter
passes. Adjust marker, page 41.
Plugged row-unit seed tube. Lift planter, expose bottom of seed tube and clean out.
Thrown or worn drive chains Check drive chains.
Worn sprockets and/or chain idlers. Replace sprockets and/or chain idlers.
Improper main shaft sprocket. Check sprockets, Veris uses 23-tooth. Conventional uses 25-
tooth.
Improper gap on speed sensor. Check speed sensor on planter for 1 ⁄
16
in to 1 ⁄
8
in gap from
wheel. Improper gap can cause erratic speed signal causing
monitor to falsely report improper planting rate. Monitor may
also falsely report a low rate on soybeans by as much as 5
percent due to difficulty in counting all of the seeds.
Meter wheel or finger pickup has
more cells than indicated on seed
rate chart. Charts are based on either 6 finger or 12 finger meters or
various wheel counts.