Liquid Fertilizer—Piston Pump System
| Symptom | Problem | Solution |
|
Pump hard to prime. | Leak in suction hoses. |
Check plumbing for leaks. Tighten and seal where needed. |
|
Open special fitting check valve. |
See PUMP PRIME AND INITIAL START UP in Prepare System section. |
|
Pump will not prime. | Strainer plugged. |
Clean strainer. |
|
Pump rate 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 rate set too low. |
Set pump according to rate chart. |
|
|
Pump valves fouled. |
See your John Deere dealer. |
|
|
Pump drive range set incorrectly. |
Set drive according to rate chart. |
|
|
Broken valve spring. |
See your John Deere dealer. |
|
Pump metering high. | Pump rate set too high. |
Select pump number according to rate chart or adjust upward due to low drive wheel slippage. |
|
Pump drive range set incorrectly. |
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. |
|
Fertilizer leaks past pump when pump is stopped. | 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. |
|
Noisy pump operation. | Pump components worn. |
See your John Deere dealer. |
|
Fertilizer leaks at opener when machine stopped. | Check valve malfunctioning. |
Repair or replace check valve. |
|
Main strainer screen plugged frequently. | Main strainer mesh too fine. |
Use courser mesh screens. See STRAINER RECOMMENDATIONS in System Overview section. |
|
Fertilizer is dirty or crystallized. |
Install finer mesh strainer on nurse tank. |
|
Liquid fertilizer tank does not fill. | Drip line or fitting plugged. |
Clean. See CLEAN LIQUID FERTILIZER TANK LID FITTINGS AND DRIP LINE HOSES in Service and Adjustments section. |
CAUTION: Avoid personal injury. Do not service if system is
under pressure. Relieve pressure through tank cap spring loaded vent.
Do not remove cap if system is under pressure.|
Fertilizer manifold pulsates or shakes. | Incorrect in-line orifice or nozzle used. |
Install correct in-line orifice or nozzle. Install gauge to monitor system pressure to verify that it is between 103—621 kPa (1.0—6.2 bar) (15—90 psi). If high, then use larger in-line orifice or decrease travel speed. |
|
Main row strainer plugged. |
Clean strainer. Install strainer on nurse tank. |
|
Fertilizer leaks at opener when machine stopped. | 14 kPa (0.1 bar) (2 psi) check valve stuck open or leaking. |
Clean or replace check valve. |
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OUO6064,000057B-19-20120313 |