GREAT PLAINS Yield-Pro Air-Pro YP2425A, Operator'S Manual

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YP2425A Table of Contents Index Troubleshooting
Great Plains | 401-626M | 2019-06-11 Table of Contents Index 97
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 63.
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 61.
Reverse marker disk to pull or throw dirt.
Auxiliary
Hydraulics
Inoperative
Marker/Fold switch set to Fold
CFM Switch must be set to “Marker” for Aux to function. Set tractor
remote circuit to Neutral or Float before switching.
Marker/Aux valve set to Marker
Selector valve must be set to Aux. Set tractor remote circuit to
Neutral or Float before changing valve.
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. See
page 155.
Problem Cause Solution