Great Plains NP4000B Operator Manual - Manual (Page 114)

110 2013+ NP4000/A/B Table of Contents Index Great Plains Manufacturing, Inc.
417-199M Table of Contents Index 2014-05-14
General Application Troubleshooting
No Fertilizer Flow
Strainer plugged Close all valves. Inspect strainer
(page 127). Clean screen and
magnets as needed.
Material run-out Check tank level.
Temperature too low Wait for warmer conditions.
On/Off solenoid valve failure or open circuit. Suspend operation (page 69).
Close emergency shut-off valve.
Discharge line from emergency
shut-off valve to tines.
Wait for applicator to be safe to
approach.
Check harness connections and
fuses.
Use console SELF-TEST mode to
command Raven valves open. Check
valve ball indicators at valves.
Problem Cause Solution
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. 30 inches)
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. 30 inches). 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 129). Clean screen
as needed.
Material run-out Check tank level.
Tines
plugging
frequently Tine tips too low for coulter depth Raise tine weldment (page 90).
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 43).
Tractor rocking backward during
stops, or lift sequence pushing tines
backward Refine stopping and/or lifting technique to avoid reverse
coulter motion in ground.