Great Plains YP4025F-1670 Operator Manual User Manual
Page 97
Great Plains Manufacturing, Inc.
Troubleshooting
93
2014-09-08
401-571M
Press
wheels not
compacting
the soil as
desired.
Incorrect spring handle setting
See “Press Wheel Adjustment” on page 89.
Wheel stagger needs adjustment for
conditions
See “Press Wheel Adjustment” on page 89.
Insufficient row unit down force
See “Refer to Figure 78” on page 71.
Too wet or cloddy.
Wait until drier weather or rework ground.
Use of incorrectly shaped tire for your
conditions.
Wedge shaped wheels work best on narrow spacings and in
wet conditions. Round edge wheels work best in wider row
spacings and drier conditions.
Incorrect press wheel depth.
Reset press wheel depth, page 89.
Press wheel
or row-units
plugging
Planting conditions too wet.
Wait until drier weather.
Too much pressure on row-units.
Reduce down pressure on row-units.
Coulters set too deep, bring up
excess dirt and moisture.
Check coulter adjustment.
Backed up with planter in the ground. Clean out and check for damage.
Failed disk bearings.
Replace disk bearings.
Disk blades worn.
Replace disk blades.
Scraper worn or damaged.
Replace scraper.
Air lines
plugging
between air
box and Y
splitters
Improper air hose routing.
With planter unfolded, hoses should form a gentle
horizontal “S” shape through the holders with no big sags.
Air leaks between manifold and
splitters
Check for leaks and correct as needed.
Fan air flow too low.
Speed up fan. If already at 3800 rpm, increase airflow by
reducing butterfly valve angle, before increasing rpm.
Seed
blowing out
of Pro-Box
door area
Fan air flow too high.
Slow down fan. If already at or below 3000 rpm, set fan at
3800 rpm and use fan butterfly valve to reduce airflow.
Seal on top of airbox damaged or out
of adjustment.
Seal should be compressed approximately
1
⁄
2
inch when
hopper or box is installed.
Hydraulic
marker
functioning
improperly
Marker circuit set to Aux
Set Marker/Aux valve on wing to Marker. See page 52.
Air in lines or valves
Re-phase Marker cylinders, then see “Marker Cylinder
Bleeding” on page 97.
Leaks in hose fittings or connections.
Check all hose fittings and connections for air or oil leaks.
Low tractor hydraulic oil level.
Check tractor hydraulic oil level.
Loose or missing bolts or fasteners.
Check all bolts and fasteners.
Needle valve plugged.
Open needle valve, cycle markers slowly and reset needle
valve. See page 172.
Needle valve(s) in sequence valve
plugged.
Open needle valves, cycle markers slowly and reset needle
valves. See page 172.
Wing Fold Switch ON
Turn Wing Fold switch OFF
Marker disk
does not
mark
Marker disc needs adjustment
Increase disc angle. If still no mark, reverse marker disk to
pull or throw dirt.
Hydraulic
Hitch Won’t
Stay Raised
Bypass valve is open at hitch
Close valve.
Problem
Cause
Solution