Great Plains ADC2220 Operator Manual User Manual
Page 97
Great Plains Manufacturing, Inc.
Troubleshooting
93
2012-10-17
167-073M
Uneven seed
spacing
Excessive field speed
Reduce speed.
Unclean seed
Use clean seed.
Air leaks
Check hopper lids, meter seals, manifold caps
and seed hose connections. Adjust latch and/or
replace seals as needed.
Erratic meter clutch
Check for damaged cables and loose
connections.
Build up of seed treatment in meter.
Clean out meter (see above).
Tower blockage
Check towers for obstructions and plugging.
Blockages sometimes move from port to port in
towers.
Seed hose plugged
Stop and raise drill with fan running. Hand-crank
meter and check for rows not delivering seed.
Row misalignment
On hoe-type drills, check that openers are lined
up with press wheels.
Meter flutes worn or damaged
Empty hopper. Inspect from above while a
second person operates calibration crank.
1 Inch
(Secondary)
Hoses
Plugged
Fan speed too low
Increase fan speed. Check fan speed against
recommendations on page 73.
Hose damage
Inspect hoses for leaks, kinks and crushing.
Replace damaged hoses.
Large foreign matter
Inspect seed for material that can pass meter
but is too large for hose.
Excess hose slack - low sections are filling with
seed
Re-route or take up slack in hoses. Leave only
enough slack for flex and fold.
Sharp bends causing seed pile-up
Re-route hoses for gradual bends.
Air leaks causing erratic seed flow
Check hopper lids, meter seals, manifold caps
and seed hose connections. Adjust latch and/or
replace seals as needed.
2.5 Inch
(Primary)
Hoses
Plugged
Fan speed too low
Increase fan speed. Check fan speed against
recommendations on page 73.
Hose damage
Inspect hoses for leaks, kinks and crushing.
Replace damaged hoses.
Sharp bends causing seed pile-up
Re-route hoses for gradual bends.
Metering with fan off
Check for lift switch circuit malfunction or
hydraulic pressure switch malfunction on older
carts. If electric clutch has been locked-up,
meters will operate during all cart movement
unless gearbox clutches are disengaged.
Air leaks causing erratic seed flow
Check hopper lids, meter seals, manifold caps
and seed hose connections. Adjust latch and/or
replace seals as needed.
Pest nests clogging hose (a risk if the cart and
drill are separated for more than a few days)
Flush hoses. Seal any open hoses and ports
during drill storage or extended parking.
Problem
Cause
Solution