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Combine Will Not Move When 4-Wheel Drive is Engaged.
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One or both rear wheels in spin-out condition.
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Increase hydrostatic pump flow by moving hydrostatic control lever forward.
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Bad electrical control switch on console.
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Replace switch.
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Bad solenoid valve on control valve.
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See your John Deere dealer.
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Spool will not work in control valve.
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See your John Deere dealer.
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Combine Will Not Move When 4-Wheel Drive is Disengaged.
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Faulty line or connection between main system and rear wheel drive control valve.
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Repair or replace parts as needed.
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4-Wheel Drive Will Not Disengage.
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Bad electrical control switch on console.
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Replace switch.
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Bad solenoid valve on control valve.
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See your John Deere dealer.
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Spool will not work in control valve.
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See your John Deere dealer.
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Rear Wheels Wander During Transport Speeds.
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Toe-in out of adjustment.
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Adjust toe-in.
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Excessive Rear Tire Wear.
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Toe-in out of adjustment.
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Adjust toe-in.
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Steering Arms Do Not contact Stops at Full Turns.
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Steering cylinder out of adjustment.
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Adjust tie rod and reset toe-in.
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Hard Steering.
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Low relief pressure in steering system.
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See your John Deere dealer.
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2-Speed 4WD will not switch between low (turtle) and high (rabbit) speed.
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Bad solenoid on 2-speed motor.
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See your John Deere dealer.
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Wiring harness on rear axle disconnected.
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Connect wiring harness. If problem still exists see your John Deer dealer.
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