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Fan motor leaks.
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Case drain line crimped, not connected to low pressure port, or connected to wrong port with high back-pressure.
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Repair fan motor.
To avoid future failures, be sure to connect drain line to low-pressure (sump) return on tractor.
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|
Fan not turning.
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Low hydraulic oil level.
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Check and fill reservoir.
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|
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Pressurized return line.
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Reverse hose connections to tractor.
|
|
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Tractor control valve return line not open.
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Cycle control lever in opposite direction momentarily.
Connect hoses so fan turns in proper direction when SCV lever is held in forward position.
|
|
|
Fan motor seal leaking.
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Replace seal. See your John Deere dealer.
|
|
|
Faulty fan motor.
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Repair or replace motor. See your John Deere dealer.
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Optional diverter valve is switched to rear coupler attachment.
|
Change diverter valve position.
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Fan vibrates.
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Dirty fan blades.
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Clean fan.
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|
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Broken fan blades; fan out of balance.
|
Replace fan assembly.
|
|
Premature fan motor seal failure.
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Incorrect hydraulic hose connections.
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Connect hoses to correct ports.
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|
|
Shutting fan off to neutral SCV position.
|
Shut fan off to float SCV position.
|
| Symptom |
Problem |
Solution |
|
Plenum pressure too low.
|
Tractor flow control set too low.
|
Increase valve setting.
|
|
|
Tractor pressure too low.
|
Check and repair tractor hydraulic system. See your John Deere dealer.
|
|
|
More than one hydraulic coupler in line.
|
Use one coupler at tractor or full flow couplers.
|
|
|
Fan motor seal leaking.
|
Replace seal. See your John Deere dealer.
|
|
|
Pressure gauge vent plugged.
|
Clean vent.
|
|
|
Faulty fan motor.
|
Repair or replace motor. See your John Deere dealer.
|
|
|
Manifold cleanout covers open.
|
Close manifold cleanout covers.
|
|
Plugged air hoses or venturis.
|
Fan turning backward.
|
Check valve removed from return line. Check and correct hose connections to tractor.
|
|
|
Foreign material in seed.
|
Clean seed or use lid screen.
|
|
|
Foreign material in manifold.
|
Blow material out through manifold cleanout covers on a regular interval.
|
|
|
Foreign material in venturi.
|
See UNPLUGGING BLOCKAGE AT VENTURI in Operating Machine-Metering section.
|
|
Pressure gauge does not zero.
|
Gauge not adjusted.
|
Zero gauge. See ZEROING PRESSURE GAUGE in Operating Machine-Air System section.
|