Great Plains ADC2220 Operator Manual User Manual
Page 95
Great Plains Manufacturing, Inc.
Troubleshooting
91
2012-10-17
167-073M
Planting too
much
(or material
consumption
too high)
Meter setting too high
Re-check against chart & calibration.
Incorrect cart setup sprockets for implement
Re-check against page 114.
High rate flute stars installed. Meter contains 3-
or 4-star high rate flutes, and standard 2-star
chart was used.
Re-install standard 2-star flutes, or adjust target
rate per “Meter Rate Adjustment” on page 67
before consulting chart.
Seed size and weight vary from chart
Calibrate. Adjust rate to compensate.
Actual field size is different
Verify field size.
Excessive overlap or irregular field shape
Adjust implement marker.
Incorrect tire size or air pressure
Check tire size and air pressure, page 107.
Meter sprocket damaged
Replace if damaged.
Clutch not disengaging
Check implement lift switch, and pressure
switch on early carts.
Erratic
Seeding
Pattern,
Emergence or
Flow
1in seed hoses plugged
Stop and raise the drill. With the fan running,
hand crank the meter and check for seed flow at
the affected rows. See also page 93.
Air leaks - even a small leak can alter seed
delivery dramatically. Air leaks can cause
seeding skips that move across the drill width.
Check hopper lids, meter seals, manifold caps
and seed hose connections. Adjust latch and/or
replace seals as needed.
Fan air flow too low - can have many of the
same symptoms as leaks.
Check fan rpm on seed monitor and air pressure
on magnehelic gauge.
Check for sufficient oil reserve and flow.
On early carts, check fan pressure switch.
Clutch circuit intermittent
Check implement lift switch. Check entire
harness for faulty or corroded connections.
Clean or replace terminals.
Obstruction in tower (sometimes moves from
row to row)
Remove tower cap. Separate and clean out
distribution rings.
Dividers missing or damaged in towers
Remove tower caps and check that dividers are
installed, and their condition.
Ground speed too high can cause erratic
seeding
Reduce ground speed.
Hoe misalignment (hoe-type ADIs only).
Check that openers are lined up with press
wheels.
Problem
Cause
Solution