Great Plains NP30A 30-foot Operator Manual - Manual (Page 109)

Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 105
2014-05-20 Table of Contents Index 407-502M
General Application Troubleshooting
Problem Cause Solution
Excess
Material
Remaining Field size different. After ruling out metering problems, re-check geography.
Excessive gaps between applicator
passes. Gap between opposing pass end trenches should be one
row space (e.g. 30in)
Material
Consumption
Too High Field size different. After ruling out metering problems, re-check geography.
Excessive overlap Gap between opposing pass end trenches should be one
row space (e.g. 30in). Also check tracks for unintended
re-applications, particularly if relying on GPS mapping.
Tank or system Leak Suspend application. Check for leaks.
Rows Not
Fertilized Check for plugged row-unit tube Stop application. Lift applicator and inspect tines.
No Fertilizer
Flow Strainer plugged Close all valves. Inspect strainer (page 119). Clean screen
as needed.
Material run-out Check tank level.
Tines
plugging
frequently Tine tips too low for coulter depth Raise tine weldment (page 93).
Coulter blades too worn Replace coulter blades.
Field too wet Wait for drier conditions.
Applicator not level from front to rear Check applicator front-to-back level (page 37).
Tractor rocking backward during
stops, or lift sequence pushing tines
backward Refine stopping and/or lifting technique to avoid reverse
coulter motion in ground.
Excessive
NH
3
loss to
atmosphere
(all rows)
Application depth too shallow Check/adjust tractor hitch (page 37), lift-assist spacers
(page 38) and gauge wheel height (page 86).
Coulters set too deep; lifting tines Reduce coulter depth to tine depth (page 93).
Insufficient sealing Adjust sealers (page 99). Test running dry. Try multiple
settings on different rows at the same time if the adjustment
needed is not obvious.
Check applicator front-to-back level.
Application rate too high for soil or
weather conditions Consult with agronomist on optimal rate and conditions.
Field speed too high Slow down.
NH
3
loss to
atmosphere
(some rows)
Wings not level Check tire pressures.
Check wings level (page 124).
Fold cylinders locked in Neutral, and
unable to follow terrain Set fold/lift circuit to continuous Extend (unfold/lower) for
field application.