Great Plains NP4000B Operator Manual - Manual (Page 110)

417-199M Table of Contents Index 2014-05-14
106 2013+ NP4000/A/B Table of Contents Index Great Plains Manufacturing, Inc.
Troubleshooting
General Applicator Troubleshooting .......................... 106
FOLD / FIELD Troubleshooting ................................. 107
NH3 Metering System Troubleshooting ..................... 108
General Application Troubleshooting......................... 110
Ground Drive Pump Troubleshooting ........................ 112
Hydraulic Drive Pump Troubleshooting ..................... 113
The topics in this section presume that the applicator has
a Raven SCS 450 console, Raven AccuFlow™ metering
system, and CDS-John Blue
®
Impellicone
®
flow divider.
If also equipped with conventional liquid capability, the
topics in this section presume that the applicator is
equipped with a CDS-John Blue
®
pump and ground
drive, or a hydraulic pump and Raven SCS 450 console.
Troubleshooting sections are also found in the following
component manuals:
016-0159-403
Raven AccuFlow™ Operator manual
016-0159-831
Raven SCS 450 Installation, Operation and Service
manual
12-M-43
CDS-John Blue NGP Pump Parts and Instructional
manual
General Applicator Troubleshooting
Problem Cause Solution
Fold or unfold jerky or
imbalanced Air in lines Bleed fold/lift circuit (page 133).
Lift jerky or imbalanced Air in lines Bleed fold/lift circuit (page 132).
Lift-Assist casters
oscillating Caster stabilizer too lightly set Increase spring tension on caster
stabilizer piston (page 143).
Uneven application
depth Excessive field speed. Reduce field speed.
Coulters set too deep, lifting entire applicator Reduce coulter depth.
Rough application conditions Rework the field.
Worn tines inadequately preparing trench Replace worn tines.
Wings too Shallow Insufficient weight transferred to wings Increase weight transfer (page 92).
Center too Shallow Excess weight transferred to wings Decrease weight transfer (page 92).
Sealers not compacting
the soil as desired. Sealer adjustment not optimal. Adjust sealer (page 87).
Not level front to rear. Check applicator front-to-back level
(page 43).
Too wet or cloddy Wait until drier weather or rework
ground.
2-Point Lift-Assist slow Adjustment valve not fully open. Open valve (page 177).