Great Plains PT1230 AA1080 Operator Manual - Manual (Page 42)

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Section 4 Troubleshooting
PT1230 Pull-Type Folding Planter 401-069M-B 4/12/05
Great Plains Mfg., Inc.
Opener disks and side gauge wheels
plugging. Adjust gap between opener disks and side gauge wheels. Refer to Side Gauge
Wheels, “Adjustments,” page 33.
Closing wheels leave severe imprint in
soil. Reduce down pressure on closing wheels. Refer to Row Unit Adjustments,
“Adjustments,” page 32.
Closing wheels not firming soil around
seed. Increase down pressure on closing wheels. Refer to Row Unit Adjustments,
“Adjustments,” page 32.
Closing wheel running on top of seed
furrow. Realign closing wheels. Refer to Row Unit Adjustments, “Adjustments,” page 32.
Repeated shearing of shaft cotter pin. Drill shaft not aligned properly. Loosen bearing and align shaft.
Drive-wheel chain consistently falls off. Chain may be too long. Remove offset link.
If chain links are stiff, oil or replace chain.
Check if trash is dislodging chain; if so, install trash guards.
No seed being planted. Check that seed hopper is full of seed.
Opener disks and side gauge wheels
plugging. Adjust gap between opener disks and side gauge wheels. Refer to Side Gauge
Wheels, “Adjustments,” page 33.
Planter will not lower. Check that pressure and return hoses are fully engaged in tractor remote outlets.
Planter frame raises or lowers slowly. Lower tractor hydraulic pressure. Tractor operating pressure must be a minimum
of 1500 psi.
Operator tractor with flow-control lever in the unrestricted position. Refer to your
tractor operator’s manual
Erratic or uneven lift. Check for air in hydraulic system. Bleed system of air if necessary.
Planter will not raise. Tractor hydraulic system bypassing oil. Readjust tractor’s hydraulic lever linkage.
Refer to your tractor operator’s manual.
Wings do not fold evenly. Large differential in wing weights. Keep attachments and hopper level even
between wings.
O-ring leaking in cylinder. Replace O-ring.
Contamination in combiner-spool orifice of slower wing. Remove contamination
from spool.
Does not fold or unfold. Selector-valve handle not fully shifted. Shift selector valve.
Selector-valve handle bent. Replace handle.
Tractor hydraulic pressure below 1900 psi. Increase to 1900 psi if allowed by trac-
tor manufacturer. If not, do not fold planter with hoppers loaded.
No seed being planted. Seed hopper empty. Fill seed hopper.
Markers not alternating. Marker hoses improperly connected to marker valve.
Check for air in marker valve. Bleed marker hydraulic system.
Marker valve defective. Replace valve. See your Great Plains dealer.
Marker floats off ground. Air in hydraulic system. Bleed marker lift cylinder.
Alternator valve defective. Replace valve. Contact your Great Plains dealer.
Check for leaks in tractor remote valves.
Marker cylinder not dropping down into J-slot. (Hose loop too short.) Lengthen
marker hydraulic hose loops.
Problem Possible Cause and Solution