Great Plains John Deere 455 30' Flat Fold Markers - Manual (Page 17)

10/17/2002 205-046M
15 Troubleshooting
Troubleshooting
Problem Solution
Hydraulic marker functioning
improperly Check all hose fittings and connections for air and oil leaks.
The chain on the folding marker should be slack when the marker is both fully extended
and fully raised.
Check tractor hydraulic oil level.
Check all bolts and fasteners.
If needle valve is plugged; open valve, cycle markers, and reset the needle valve.
Double selector valve positioned for fold cylinders. Shift valve to marker sequence posi-
tion.
Blade does not mark The marker folding linkage and chain must have enough slack to allow the marker disk to
drop down into depression in the field. Maximum down float should be limited by the
slots at the rod end of the marker cylinder, and not by the chain. Read the adjustments
section of this manual when adding slack to chain.
The blade may be reversed to pull dirt in or throw dirt out depending on soil conditions.
An optional smooth blade is available through your Great Plains dealer. The notch blade
comes with your marker as standard equipment.