Great Plains 3-Point Solid Stand Drills - Manual (Page 9)

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7 3/19/03 Great Plains Mfg., Inc.
Section 5 Troubleshooting Guide
113-324M
Problem Solution
Hydraulic Marker functioning
improperly a. Check all hose fittings & connections for air and oil leaks.
b. The chain on the folding marker should be slack when the marker is both
fully extended and fully raised.
c. Check tractor hydraulic oil level.
d. Check all bolts and fasteners.
e. If needle valve is plugged; open valve, cycle markers, and reset the nee-
dle valve.
f. Double selector valve positioned for fold cylinders. Shift valve to marker
sequence position.
Blade does not mark a. The marker folding linkage and chain must have enough slack to allow the
marker disk to drop down into depressions 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 the chain.
b. The blade may be reversed to pull dirt in or throw dirt out depending on
soil conditions. See disk adjustments in this manual.
c. An optional smooth blade is available through your Great Plains dealer.
The notched blade comes with your marker as standard equipment.
Section 5
Troubleshooting Guide