Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
98
3PYPA
Table of Contents
Index
Troubleshooting
Hydraulic marker
functioning
improperly, or not
at all
Marker/Fold switch set to Fold.
CFM Switch must be set to “Marker”. Set tractor remote circuit to
Neutral or Float before operating switch.
Marker/Aux valve set to Aux
On a planter with optional Auxiliary Hydraulics, selector valve
must be set to Marker for markers to function. Set tractor remote
circuit to Neutral or Float before changing valve.
Air or oil 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(s) in sequence valve
plugged.
Open needle valves, cycle markers slowly and reset needle
valves, refer to page 169.
Marker disk does
not mark
Marker folding linkage does not have
enough slack to allow marker disk to
drop into field depressions.
Maximum down float should be limited by the slot at the rod end of
the marker cylinder, refer to page 170.
Reverse marker disk to pull or throw dirt.
Hydraulic Hitch
Won’t Stay Raised
Bypass valve is open at hitch
Close valve.
Speed Reading
Doesn’t Match
Tractor
Monitor speed reading will only match
tractor with planter lowered
If speeds don’t agree during planting (with planter lowered),
re-calibrate radar speed sensor with planter lowered.
Problem
Cause
Solution
