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2019-03-11
407-502M
NP30A or NP40A
105
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
General Applicator Troubleshooting
Problem
Cause
Solution
Fold or unfold jerky or
imbalanced
Air in lines
Bleed fold circuit (page 126).
Lift jerky or imbalanced
Air in lines
Re-phase lift circuit (page 51).
Depth stop uneven
Air in lines
Re-phase lift circuit (page 51).
Lift-Assist casters
oscillating
Caster stabilizer too lightly set
Increase spring tension on caster stabilizer
piston (page 130).
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 38),
lift-assist spacers (page 38) and gauge wheel
height (page 86).
3-Point: check/adjust tractor hitch (page 38)
and gauge wheel height (page 86)
Coulters set too deep; lifting knives or
tines
Reduce coulter depth to shoe depth (page 99).
Insufficient sealing
Adjust sealers (page 102). 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 51).
Check tire pressures (all models).
Check wings level on all models (page 92).
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.