Great Plains YP4425A Operator Manual User Manual
Page 94
90
YP4425A
Great Plains Manufacturing, Inc.
401-805M
2012-02-23
Uneven
seed
spacing
See “Population Troubleshooting Charts” on page 84.
Excessive field speed.
Reduce field speed.
Unclean seed.
Use clean seed.
Damaged seed tube
Inspect; repair or replace.
Seed-Lok
®
plugging.
Lock up Seed-Lok
®
Row-unit discs not turning.
See “Row-unit discs not turning freely” in this
Troubleshooting chart.
Worn/rusted sprockets and/or chain
idler or bearings.
Check and replace any worn/rusted sprockets or chain idlers.
Partially plugged row-unit seed tube. Lift up planter, expose bottom of seed tube and clean out.
Lack of proper seed lubrication on
seed.
See “Seed Lubricant” on page 128.
Planter does
not fold or
unfold fully
Fold cylinders out of phase
Re-phase cylinders, refer to page 30
Air in lines
Bleed fold circuit, refer to page 101
Uneven
seed depth
Excessive field speed.
Reduce field speed.
Planting conditions too wet.
Wait until drier weather.
Incorrect coulter depth setting.
See coulter manual or set unit mounted coulter.
Excessive or improper row unit down
pressure spring setting.
See 25 series row-units, page 67.
Damaged seed tubes.
Check seed tubes for damage.
Seed-Lok
®
building up with dirt.
Lock up Seed-Lok
®
Row-unit not penetrating low spots.
Adjust row-unit, see instructions beginning on page 67.
Rough planting conditions.
Rework the field.
Seed firmer not in place and set to
correct tension.
See “Seed Firmer Adjustments” on page 79.
Press wheel
or row-units
plugging
Planting conditions too wet.
Wait until drier weather.
Too much pressure on row-units.
Reduce down pressure on row-units.
Coulters set too deep, bring up
excess dirt and moisture.
Check coulter adjustment.
Planter not set to run level from front
to rear.
Backed up with planter in the
ground.
Clean out and check for damage.
Failed disc bearings.
Replace disc bearings.
Disc blades worn.
Replace disc blades.
Scraper worn or damaged. Side
depth wheels not set correctly.
Adjust side depth wheels page.
General Troubleshooting
Problem
Cause
Solution