Great Plains NP30A 30-foot Operator Manual - Manual (Page 104)

407-502M Table of Contents Index 2014-05-20
100 NP30A or NP40A Table of Contents Index Great Plains Manufacturing, Inc.
Troubleshooting
The topics in this section presume that the applicator has
a Great Plains-supplied Raven SCS 450 console, Raven
AccuFlow™ metering system, and CDS-John Blue
®
Impellicone
®
flow divider.
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
General Applicator Troubleshooting
Problem Cause Solution
Fold or unfold jerky or
imbalanced Air in lines Bleed fold circuit (page 121).
Lift jerky or imbalanced Air in lines Re-phase lift circuit (page 50).
Depth stop uneven Air in lines Re-phase lift circuit (page 50).
Lift-Assist casters
oscillating Caster stabilizer too lightly set Increase spring tension on caster stabilizer
piston (page 129).
Excessive NH
3
loss to
atmosphere (all rows)
Application depth too shallow Pull-type: check/adjust depth stop (page 85).
2-Point: check/adjust tractor hitch (page 37),
lift-assist spacers (page 38) and gauge wheel
height (page 86).
3-Point: check/adjust tractor hitch (page 37)
and gauge wheel height (page 86)
Coulters set too deep; lifting knives
or tines Reduce coulter depth to shoe depth (page 94).
Insufficient sealing Adjust sealers (page 97). 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.
Check wear on disc sealers.
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 Re-phase cylinders on pull-type and 2-Point
(page 50).
Check tire pressures (all models).
Check wings level on all models (page 124).
Fold cylinders locked in Neutral, and
unable to follow terrain Set fold circuit to Float for field application.
Worn knives inadequately preparing
trench Replace worn knives.