Great Plains PD8070 Operator Manual User Manual
Page 63
Great Plains Manufacturing, Inc.
Troubleshooting
59
2014-07-23
401-479M
Seed spacing not as
indicated in charts
Check that tires are inflated to proper pressure. See “Tire Inflation Chart” on
page 97.
Examine seed for inconsistent size. Do field check and adjust sprockets accordingly.
Check that correct sprockets are installed on the transmission shafts. See “Seed
Rate: Sprocket Combinations” on page 35.
Excessive speed may be causing row unit bounce. Reduce ground speed when
planting.
Charts are approximate. Slight variations due to wear may produce seed spacing
variations.
Scattering of seeds
Reduce planting speed.
Check seed tube for proper installation.
Examine seed tube for wear or damage. Replace seed tube if necessary.
Seed tubes and/or
openers plugging
Do not allow planter to roll backward when lowering. Lower planter only when tractor
is moving forward.
On four-wheel-drive tractors, avoid turning tractor when planter is down and
stationary.
Inconsistent seed
depth
Increase down pressure on row unit. See “Row Unit Down Pressure” on page 46.
Inspect seed tube for plugging or improper installation. Check that seed tubes are
hooked properly in shank of row unit.
None of the row units
are planting
Pin between counter-shaft and seed transmission sheared. Repair cause of pin
shearing and replace pin.
Opener disks and side
gauge wheels
plugging
Adjust gap between opener disks and side gauge wheels. See “Row-Unit Opener
Adjustments” on page 49.
Fertilizer hopper not
metering
Pin between counter-shaft and fertilizer transmission sheared. Repair cause of pin
shearing and replace pin.
Closing wheels leave
severe imprint in soil
Reduce down pressure on closing wheels. See “Row Unit Down Pressure” on
page 46.
Closing wheels not
firming soil around
seed
Increase down pressure on closing wheels. See “Row Unit Down Pressure” on
page 46.
Closing wheel running
on top of seed furrow
Realign closing wheels. See “Press Wheel Adjustments” on page 55.
Repeated shearing of
shaft cotter pin
Drive shaft not aligned properly. See “Shaft Alignment” on page 67.
Drive wheel chain
consistently falls off
Chain may be too long. Remove offset link.
If chain links are stiff, oil or replace chain.
Check if trash is dislodging chain; if so, install trash guards.
No seed being planted
Check that seed hopper is full of seed.
Problem
Possible Cause and Solution