|
Pump hard to prime.
|
Leak in suction hoses.
|
Check plumbing for leaks. Tighten and seal where needed.
|
|
|
Open special fitting check valve.
|
See PRIMING AND INITIAL START UP OF PUMP in Liquid Fertilizer-Piston Pump section.
|
|
Pump will not prime.
|
Strainer plugged.
|
Clean strainer.
|
|
|
Pump set too low.
|
Set pump according to rate chart.
|
|
|
Pump valves fouled.
|
See your John Deere dealer.
|
|
|
Packings worn.
|
See your John Deere dealer.
|
|
Pump metering low.
|
Leak in suction hoses.
|
Check plumbing for leaks. Tighten and seal where needed.
|
|
|
Open special fitting check valve.
|
See your John Deere dealer.
|
|
|
Strainer plugged.
|
Clean strainer.
|
|
|
Pump set too low.
|
Set pump according to rate chart.
|
|
|
Pump valves fouled.
|
See your John Deere dealer.
|
|
|
Pump drive set wrong.
|
Set drive according to rate chart.
|
|
|
Broken valve spring.
|
See your John Deere dealer.
|
|
Pump metering high.
|
Pump set too high.
|
Select pump number according to rate chart or adjust upward due to low drive wheel slippage.
|
|
|
Pump drive set wrong.
|
Set drive according to rate chart.
|
|
|
Valve stuck open.
|
See your John Deere dealer.
|
|
|
Broken valve spring.
|
See your John Deere dealer.
|
|
|
Contaminates under valve.
|
See your John Deere dealer.
|
| Symptom |
Problem |
Solution |
|
Fertilizer leaks past pump when pump is stopped.
|
Incorrect orifice or nozzle used.
|
Install correct orifice or nozzle.
|
|
|
Valve stuck open.
|
See your John Deere dealer.
|
|
|
Broken valve spring.
|
See your John Deere dealer.
|
|
Leaks between pump and crankcase.
|
Rod packing worn.
|
See your John Deere dealer.
|
|
Pump using excessive oil.
|
Oil seals worn.
|
See your John Deere dealer.
|
|
|
O-rings leaking.
|
See your John Deere dealer.
|
|
Pump noisy when operating.
|
Pump components worn.
|
See your John Deere dealer.
|
|
Fertilizer leaks at opener when machine stopped.
|
Check valve malfunctioning.
|
Repair or replace check valve.
|
|
Excessive cleanout of main strainer required or type of fertilizer used, plugs screen.
|
Main and row strainer mesh too fine.
|
Use courser mesh screens. See STRAINER MAINTENANCE in Liquid Fertilizer-Piston Pump section.
|
|
|
Fertilizer is dirty or crystallized.
|
Install finer mesh strainer on nurse tank.
|
|
Liquid fertilizer tank will not fill.
|
Drip line or cap fitting plugged.
|
CAUTION! Do not service if system is under pressure. Relieve pressure through fill line.
Clean. See CLEANING LIQUID FERTILIZER TANK LID FITTINGS AND DRIP LINE HOSES in Service and Adjustments section.
|
|
Fertilizer manifold pulsates or shakes.
|
Incorrect orifice or nozzle used.
|
Install correct orifice or nozzle. Install gauge to monitor system pressure.
|
|
|
Main and/or row strainer plugged.
|
Clean strainer. Install strainer on nurse tank.
|