Great Plains ADC2250 Operator Manual - Manual (Page 41)

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Section 4 Troubleshooting
7/28/10 Model 2250 Air Drill Cart 167-033M
Great Plains Mfg., Inc.
Problem Solution
Actual seed rate is different from rate
desired. Air leaks; check for air leaks around lids and on bin. A small air leak can reduce
the seeding rate dramatically.
Gearbox, quick change sprockets or driving/driven gears are not set correctly.
Check the seed rate charts and set them correctly.
Check the cart tires for correct pressure; over or under inflation will affect rates.
Seed treatment building up on meter; unload bin and clean out meter.
Foreign matter is blocking meter. Keep strainer basket in place and foreign matter
out of bin.
Electric clutch height switch is set too low; clutch is not engaging.
Faulty or corroded electric clutch harness connections letting the clutch disen-
gage; clean or replace terminals.
Fan speed too low, the pressure switch is not staying set. Run the fan at a higher
speed.
Running meter out of seed. Enough seed should be kept in the drill to cover the
agitator shaft.
Improper clutch sprocket installed; 45’ drills use 29t sprocket; 34’ drills use 38t
sprocket.
Gearbox shifters forced out of place by forcing the gearbox to shift with the clutch
handle engaged. Gearbox no longer indicating actual setting.
Foreign matter in seed. Rate Charts are based on clean, untreated seed.
Erratic seeding pattern or emergence 1” hoses plugged; stop and raise the drill with the fan running. Hand crank the
meter to see if any hoses are plugged, refer to the Setting the Drill Seeding Rate in
the “Adjustments” section starting on page 20.
Air leaks; check carefully for leaks and adjust the latch or replace the seals as
needed.
Poor connection for the electric clutch leads letting the clutch cycle on/off.
Debris in tower blocking the hoses. Blockage may shift from outlet to outlet.
Driving too fast.
Opener not lined up with press wheel.
1” hoses are plugging. Hoses have too much slack; leave only enough slack for the drill wing flexing.
Fan speed is too low for seeding rate.
Damaged hoses need replaced.
Debris in seed too large for hose.
2 1/2” hoses are plugging. Hoses are routed with too sharp of bends.
Fan speed is too slow.
The meter is not shutting off when the fan is off.
Fan won’t run fast enough. Tractor hydraulics are not supplying enough oil. Must be able to supply 15gpm at
2000psi.
Tractor oil level is too low.
Trying to run the fan backwards; bottom of the blade should move towards the rear
of the drill.
Check valve installed backwards.
Section 4
Troubleshooting