Great Plains YP825A Operator Manual User Manual
Page 96
92
YP425A, YP625A and YP825A
Great Plains Manufacturing, Inc.
401-651M
2014-08-15
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) plugged.
Open needle valves, cycle markers slowly and reset needle
valves, refer to page 164.
Marker disk
does not
mark
Disk angle too straight for soil
conditions
Reverse marker disk to pull or throw dirt.
Speed
Reading
Doesn’t
Match
Tractor
Monitor speed reading, using
optional radar, will only match tractor
with planter lowered.
(Speed reading with magnetic
pickup falls to zero when lifted.)
If speeds don’t agree during planting (with planter lowered),
re-calibrate radar speed sensor with planter lowered.
General Troubleshooting
Problem
Cause
Solution