OMN406828

Symptom	Problem	Solution
Hydraulic/Hydrostatic System overheating. (Warning is displayed.)	Air passages in cooler core plugged.	Clean cooler core.
	Fan belt slipping or broken.	Check automatic belt tensioner or replace fan belt.
	Rotary screen not rotating-cotton fans not engaged.	Engage cotton fans.
	Rotary screen belt broken.	Replace belt.
	Hydraulic oil level low.	Check system for leak and repair. Fill reservoir to appropriate level.

Picker will not propel forward or reverse.	Hydrostatic oil not properly warmed up.	When operating in temperatures below -12°C (10°F), run-in picker 10—15 minutes to warm up hydrostatic drive oil. See COLD WEATHER OPERATION in Operating the Machine section.
	Drive systems unable to maintain charge pressure.	See your John Deere dealer.
	Solenoid loose on propel pump or motors.	Reinstall solenoid.
	Transmission inoperative (de-rate warning on ADU).	Check transmission or see your dealer.
	Hydraulic oil level low.	Check system for leak and repair. Fill reservoir to appropriate level.
	Broken coupling from motor to transmission.	Repair as needed.
	Air leak in system.	Tighten connections.
	Propel charge filter plugged.	Change filter element.
	Park brake engaged via armrest switch.	Release park brake.
	Pump/pump drive splines damaged.	See your John Deere dealer.
	Damaged pressure sensor.	Replace sensor.
	Pressure sensor disconnected.	Attach sensor.
	Tried to disengage park brake before start-up check complete.	Key off. Restart and wait until run page displays on ADU before attempting to move machine.
	Multifunction control handle moved out of neutral during start-up check.	Key off. Return handle to neutral and restart machine.

Ground travel speed erratic.	Hydraulic oil level low.	Check system for leak and repair. Fill reservoir to appropriate level.
	Propel charge filter plugged.	Change filter element.
	Multifunction control handle creeps toward neutral.	Replace friction washers and/or springs as necessary.
	Drive systems unable to maintain charge pressure.	See your John Deere dealer.
	Solenoid loose on propel pump or motors.	Reinstall solenoid.

Picker not responding to multifunction control handle.	Hydrostatic oil not properly warmed up.	When operating in temperatures below -12°C (10°F), run-in picker 10—15 minutes to warm up hydrostatic drive oil. See COLD WEATHER OPERATION in Operating the Machine section.
	Operator presence system activated.	Bring hydro lever to neutral and try again.
	Propel charge filter plugged.	Change filter element.
	Air in system.	Tighten connections, hose clamps, and check for broken hydraulic lines.
	Hydraulic oil level low.	Check system for leak and repair. Fill reservoir to appropriate level.
	Drive systems unable to maintain charge pressure.	See your John Deere dealer.
	Solenoid loose on propel pump or motors.	Reinstall solenoid.

Lack of power or loss of power.	Hydrostatic oil not properly warmed up.	When operating in temperatures below -12°C (10°F), run-in picker 10—15 minutes to warm up hydrostatic drive oil. See COLD WEATHER OPERATION in Operating the Machine section.
	Hydraulic oil level low.	Check system for leak and repair. Fill reservoir to appropriate level.
	Propel charge filter plugged.	Change filter element.
	Leaking or broken oil line or connection.	Check and repair as necessary.
	Drive system unable to maintain or build up pressure.	See your John Deere dealer.

Picker will not start in neutral or will start when hydro lever is in any operational position.

Safety switches out of adjustment, faulty wiring or inoperative switch.

Check wiring connections or see your John Deere dealer.

DP99999,000081A-19-20120126