Great Plains CTA4000 HD Operator Manual - Manual (Page 57)

Great Plains Manufacturing, Inc. Troubleshooting 53
2012-11-28 160-037M
Uneven seed depth Excessive field speed Slow down. Check Seeding Rate Chart for
correct maximum field speed.
Insufficient down force for low
spots Increase down force
Openers “diving” during no-till
operations Opener frame adjustment incorrect for down
force range. See “Opener-Subframe
Adjustment” on page 45.
Implement not level Check:
“Eyebolt Adjustment” on page 26 and
“Frame Level” on page 39.
Planting conditions too wet Wait until drier weather.
Uneven depth across
implement Implement not level See “Frame Level” on page 39.
Lift cylinders may also need bleeding. See
“Bleeding Lift Hydraulics” on page 22.
Weight transfer to wings too high
or too low. See “Adjusting Weight Transfer” on page 42.
Press wheel heights not all the
same Set T-handles the same.
Opener heights not all the same See page 47.
Implement height
changing or creeping Air in system See “Bleeding Lift Hydraulics” on page 22.
Worn lift components. If a cylinder is leaking oil past a seal, consult
the Parts Manual and replace the seal.
Tractor hydraulic malfunction Confirm by using a different circuit for lift.
Seeding pattern skipping
rows Plugged openers Check that disks turn freely. Check scrapers.
Seed hose plugged Stop and raise implement with fan running.
Hand-crank meter and check for rows not
delivering seed.
Hose disconnected or leaking Check hose path from front cart meter to row
unit. Check for leaks in hoses.
Seed tube plugged Check for debris and pest nests in tube.
Primary seed hoses are
plugging
Fan speed too low Increase hydraulic flow to circuit.
Erratic fan speed Observe rpm reported by monitor, then check
for oil flow surging by tractor.
Flow not stopping when raised Have observer verify that meter gear rotation
ceases when implement is moving while
raised.
Damaged hoses Inspect and repair as needed.
Sharp bends or too much slack in
hoses Re-route hoses for minimum necessary slack
and no sharp bends.
Secondary seed hoses
plugging Fan speed too low Increase hydraulic flow to circuit.
Damaged hoses Inspect and repair as needed.
Debris in seed or hoses Disconnect, inspect and clear.
Sharp bends or too much slack in
hoses Re-route hoses for minimum necessary slack
and no sharp bends.
Problem Cause Solution