Great Plains SML1000 Operator Manual User Manual
Page 28
24
SML-1000, SML-750, SML-500
Great Plains Manufacturing, Inc.
407-451M
03/31/2011
a.
See Seed Rate manual for relief valve pressure range and adjustment.
MetaData: End of “Troubleshooting”
Material
Dumping
Orifice size too small for
material or rate
Re-check orifice plates against Seed Rate manual
guidelines.
Speed too high
Gallons/acre or liters/ha is correct, but speed is too high
for orifice plate size. Slow down or recalculate for speed
actually used.
Relief valve set too low
Check and adjust the relief valve. If not set too low, ori-
fice size is likely to small for material viscosity or solids.
Pump strainer clogged or
mesh size too fine for mate-
rial
Inspect pump strainer. Clean filter mesh. Check size
against material requirements.
Low Flow
But no material is dumping...
Pump drive in Low Range
Exchange sprockets
Valve not fully open
Check tank discharge, cart outlet and implement inlet
valves. Align handles with hose.
Ground drive wheel slipping
Wait for dryer conditions
Rate setting calculation (or
pump range/scale setting)
incorrect
Re-check field size, swath, speed, pump setup and ori-
fice plate sizing.
Pump wearing
This check for positive displacement pumps only:
With implement lowered and stopped, and tank over
half full, disconnect fitting at pump outlet. Once fluid
already present in fitting drains off, flow should stop.
If material continues to flow, even at a very low rate,
it indicates bypass in the pump. Repair or replace the
pump.
Erratic
Gauge
Reading
Air in lines
Prime pump or wait for pump to clear air.
Failed gauge
Replace gauge.
Cold weather: material too
viscous for accurate reading
Wait for warmer weather.
High Flow
Pump drive in High Range
Exchange sprockets
Rate setting calculation (or
pump range/scale setting)
incorrect
Re-check field size, swath, speed, pump setup and ori-
fice plate sizing.
Fertilizer Cart Troubleshooting
Problem
Cause
Solution
Page(s)