Great Plains NP30A 30-foot Operator Manual - Manual (Page 105)

Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 101
2014-05-20 Table of Contents Index 407-502M
NH
3
loss to atmosphere
(one row)
Plugged knife or tine See “Clearing Plugged Knives or Tines” on
page 112.
If knives or tines are plugging frequently, check:
coulter setup, application depth, knife/tine wear.
Field conditions and weather may also be
unsuitable at the moment.
Disconnected delivery or vapor line Treat this as knife or tine plugging (page 112)
until the cause is determined. If the cause is tall
tough field trash, consider re-working the field if
disconnects are frequent.
Knife shear bolt failed Replace shear bolt (page 95).
Sealer mis-adjusted or failed (such
as a broken spring) Check sealer. Adjust (page 97) or repair.
Rows in tractor tracks too shallow Reset tractor wheel spacing to avoid rows.
Uneven application
depth Excessive field speed. Reduce field speed.
Incorrect coulter depth setting. Set coulters to depth of knife or tine shoes
(page 94).
Rough application conditions. Rework the field.
Wings too Shallow Insufficient weight transferred to
wings Increase weight transfer (page 87).
Center too Shallow Excess weight transferred to wings Decrease weight transfer (page 87).
Knives or tines
plugging frequently Knives or tines worn Replace worn knives or tines.
Field too wet Wait for drier conditions.
Tractor rocking backward during
stops, or lift sequence pushing
knives or tines backward Refine stopping and/or lifting technique to avoid
reverse knife or tine motion.
Sealers plugging Conditions too wet. Wait for drier conditions.
Too much pressure on row-units. Reduce spring pressure.
Coulters set too deep, bring up
excess dirt and moisture. Check coulter adjustment.
Fertilizer Applicator not level from
front to rear Check applicator front-to-back level (page 37).
Failed bearings Replace bearings.
Disc blades worn Replace disc blades.
Sealers not compacting
the soil as desired. Sealer adjustment not optimal. Adjust sealer (page 97).
Not level front to rear. Check applicator front-to-back level (page 37).
Too wet or cloddy Wait until drier weather or rework ground.
2-Point Lift-Assist slow Adjustment valve not fully open. Open valve (page 155).
General Applicator Troubleshooting
Problem Cause Solution