Great Plains NP3000A Operator Manual - Manual (Page 107)

Great Plains Manufacturing, Inc. Table of Contents Index Troubleshooting 103
2014-04-22 Table of Contents Index 407-613M
Hydraulic Drive Pump Troubleshooting
The Ace Pump Instruction manual (HYD-MAN) and the
Raven SCS-450 Installation, Operation and Service
manual (016-0159-831) have additional troubleshooting
information.
High Rate
Ground drive on High Range when
rate requires Low Exchange Range sprockets (page 94).
Dial setting incorrect Re-check Range and Dial settings for rate.
Low Manifold
Pressure Relief valve set too low Adjust relief valve (page 94).
Ground drive on Low Range when
rate requires High Exchange Range sprockets (page 94).
Field speed too low Increase speed or reduce orifice plate size.
Ground drive wheel or chains
slipping Check condition of arm and chains. Check operating height
of applicator (may be too high). If soil is too wet, try
reconfiguring for a lower manifold pressure, or wait for dryer
conditions.
Product
Dumping at
Relief Valve Rate, speed or material viscosity too
high for orifice plate size Re-check pump rate determination, Range sprocket, pump
dial and console setup (Option). If correct, replace orifice
plates with a larger size (page 91).
Orifice plates clogged Use larger plates (page 91) or finer strainer screen
(page 93).
Relief valve set too low Adjust relief valve (page 94).
Tines plugged Clean out tine tubes
Material slushy due to low
temperature, or actual ice in boom Wait for warmer conditions.
High Manifold
Pressure Ground drive on High Range when
rate requires Low Exchange Range sprockets (page 94).
Field speed too high Reduce speed or increase orifice plate size.
Problem Cause Solution
Problem Cause Solution
Rate Alarm,
Low System not fully charged Prime system. Check for blocked air bleed line on standard
first pump. Open petcock on user-plumbed second pump.
One or more manual valves not fully
open Suspend operations. Check all manual valves from nurse
tank withdrawal valve (if any) to inlet shut-off valve.
Control valve malfunction or harness
status Check harness connections and fuses.
Use console SELF-TEST mode to command rate to zero.
Check indicator at control valve.
Command rate to maximum. Check valve open.
Rate Alarm,
High Incorrect VALVE CAL for Control
Valve or METER CAL for flow meter. Recheck console setup against values provided for
components (page 44).
Control Valve failed, or harness
status Check harness connections and fuses.
Use console SELF-TEST mode to command rate to zero.
Check indicator at control valve.
Command rate to maximum. Check valve open.