Great Plains NTA3007 Operator Manual - Manual (Page 123)

Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 119
2012-07-02 Table of Contents Index 166-371M
Openers drill too deep
(Bulldozing) Too much hydraulic down pressure on
openers. Reduce hydraulic down pressure on
openers.
Incorrect press wheel adjustment. Readjust press wheel (page 114).
Front of openers
dropping too low in
hard or minimum-till
conditions Incorrect opener frame setting. Remove shims (page 106).
Too much hydraulic down pressure on
openers. Reduce hydraulic down pressure on
openers.
Opener frames do not
float over uneven
terrain Hydraulic lever not locked forward. Lock hydraulic lever forward.
Openers not connected to circuit designed
for hydraulic motor control. See “Hydraulic Hose Hook-Up” (page 28).
Pressure gauges read
zero when openers are
lowered and tractor
hydraulic lever is held
forward Hydraulic hoses not routed correctly
between pressure control valves and opener
lift cylinders. See hose routing diagrams (beginning
page 177).
Pressure gauges show
pressure when
openers are raised Hydraulic hoses not routed correctly
between pressure control valves and opener
lift cylinders. See hose routing diagrams (beginning
page 177).
Hydraulic marker
functioning improperly 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.
Chain length incorrect
Marker disc does not
mark Marker folding linkage does not have enough
slack to allow marker disc to drop into field
depressions. Maximum down float should be limited by the
slot at the rod end of marker cylinder.
Disc orientation not ideal for conditions Reverse marker disc to pull or throw dirt.
Chain Skipping or
Excess Wear Debris/no retainer clip Be sure retainer clip is facing in opposite
direction of chain travel (page 123).
Excess slack Adjust chain slack (page 123)
Sprockets not aligned Adjust sprockets on shafts.
Problem Causes Solutions