Great Plains 3N-3020 Operator Manual - Manual (Page 52)

3N-3010 and 3N-3020
196-366M 3/29/2012
50
Note: For Veris Drive monitor troubleshooting refer to page 63 s.
Problem Cause Solution
Hydraulic marker functioning
improperly Air or oil leaks in hose fittings or connec-
tions. 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, refer to page 42.
Needle valve(s) in sequence valve
plugged. Open needle valves, cycle markers slowly
and reset needle valves, refer to page 42.
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 cylin-
der, refer to page 42.
Reverse marker disk to pull or throw dirt.
Drill does not fold or unfold fully Rephase cylinders, refer to page 20
Bleed fold circuit, refer to page 20
Adjust fold cylinders, refer to page 20
Drill wanders back and forth in
transport Use all locks.
Adjust tongue shims on rub blocks or frame
spacers.
Adjust fold cylinders, refer to page 20