Great Plains PD8070 Operator Manual - Manual (Page 34)

PD8070
401-266M 1/24/2006
32
Seed spacing not as indicated in
charts. Check that tires are inflated to proper pressure. Refer to Tire Inflation Chart,
“Appendix,” page 52.
Examine seed for inconsistent size. Do field check and adjust sprockets accord-
ingly.
Check that correct sprockets are installed on the transmission shafts. Refer to
Planting Rate Charts, “Adjustments,” beginning on page 20.
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 sta-
tionary.
Inconsistent seed depth. Increase down pressure on row unit. Refer to Row Unit Adjustments, “Adjust-
ments,” page 20.
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. Refer to Side Gauge
Wheels, “Adjustments,” page 20.
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. Refer to Row Unit Adjustments,
“Adjustments,” page 20.
Closing wheels not firming soil
around seed. Increase down pressure on closing wheels. Refer to Row Unit Adjustments,
“Adjustments,” page 20.
Closing wheel running on top of
seed furrow. Realign closing wheels. Refer to Row Unit Adjustments, “Adjustments,” page 20.
Repeated shearing of shaft cotter
pin. Drill shaft not aligned properly. Loosen bearing and align shaft.
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.
Opener disks and side gauge
wheels plugging. Adjust gap between opener disks and side gauge wheels. Refer to Side Gauge
Wheels, “Adjustments,” page 20.
Planter will not lower. Check that pressure and return hoses are fully engaged in SCV outlets.
Problem Possible Cause and Solution