GREAT PLAINS PL5500, Operator'S Manual, Page: 90 / 109

PL5500 Planter Table of Contents Index Troubleshooting
Great Plains | 411-633M | 10/21/2021 83
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Dry Fertilizer Troubleshooting
High pressure
at desired rate
Orifice size too small Review orifice sizing. If at recommended size, try the next
large size. Charts are based on typical density/viscosity
materials. See Material Rate manual.
Plugged nozzles Inspect low - flow rows, or several nozzles. Clean plates.
Consider smaller strainer screen size and/or large orifice
plate size. Sedimentation, coagulation, particulates,
foreign matter can also cause unusually high pressure.
Orifice plates upside down Position plates with words facing the outlet. Orifice port
holes are not symmetrical, and at smaller sizes this can
cause slightly higher back
- pressure with denser materials.
Very high flow
Fertilizer transmission in high range
when low range was intended Change sprockets. See Material Rate manual.
Possible pump issues Refer to the pump manual.
Pump leaks
Possible pump issues Refer to the pump manual.
Pump oil
consumption
Pump seals or O - ring Refer to the pump manual.
Noisy pump
Crankcase components worn Refer to the pump manual.
Problem Cause Solution
Problem Cause Solution
No fertilizer
flow, all rows
Hopper empty Fill hopper.
Chain missing at one or more
drive stages Check all chains.
No fertilizer
flow, some
rows
Hopper plugged Clean out any material clogging discharge port.
Shaft disconnected Check couplers along final drive shaft.
No fertilizer
flow, one row
Applicator tube plugged with soil Disconnect hose at top of applicator tube. Remove blockage
from below. Raise release height.
Applicator tube plugged with
fertilizer Disconnect hose at top of applicator tube. Remove blockage
from below. Use finer grained fertilizer, or dry out the fertilizer
if coagulation is the problem.
Low flow
Field speed too high Apply at a lower speed. Metering is lower at high speeds.
Ground drive wheel slipping Check lowered tool bar height. Operate at a lower field
speed. Field conditions may be too wet for reliable meter
drive. Spiked Wheel drive machines may install 417-346A
(Paddle Wheel Kit) for additional traction.
Meter flutes worn Inspect meter flute. Replace as needed.
High flow
Field speed too low for
transmission sprockets selected Apply at a higher speed, or use a new sprocket pair for the
actual rate and speed. Metering is higher at low speeds.
Fertilizer on
surface
Release height too high Lower release height.
Coulter depth too shallow Increase coulter depth (page 47).