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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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Pressurized return line.
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Reverse hose connections to tractor.
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Selector valve set for AUGER.
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Push valve handle in for FAN operation.
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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.
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Faulty selector valve.
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Repair or replace valve. See your John Deere dealer.
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Damaged fan/motor coupling.
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Repair or replace coupling. See your John Deere dealer.
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Fan motor seal leaking.
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Replace seal. See your John Deere dealer.
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Faulty fan motor.
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Repair or replace motor. See your John Deere dealer.
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Fan vibrates.
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Dirty fan blades.
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Clean fan.
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Damaged fan/motor coupling.
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Repair or replace coupling. See your John Deere dealer.
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Broken fan blades; fan out of balance.
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Replace fan assembly.
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| Symptom |
Problem |
Solution |
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Fan speed too slow.
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Tractor flow control set too low.
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Increase valve setting.
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Tractor pressure too low.
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Check and repair tractor hydraulic system. See your John Deere dealer.
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More than one hydraulic coupler in line.
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Use one coupler at tractor or full flow couplers.
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Faulty selector valve.
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Repair or replace valve. See your John Deere dealer.
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Fan motor seal leaking.
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Replace seal. See your John Deere dealer.
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Faulty fan motor.
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Repair or replace motor. See your John Deere dealer.
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Plugged air hoses or manifolds.
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Fan turning backward.
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Check valve removed from return line. Check and correct hose connections to tractor.
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