| Symptom | Possible Cause | Solution | |---|---|---| | | Low oil supply | Check sight glass, fill with correct oil | | Entire hydraulic system fails to function | Clogged hydraulic filters | Replace filters | | Entire hydraulic system fails to function | Clogged charge pump suction screen | Clean screen | | Entire hydraulic system fails to function | Oil cooler air passages clogged | Clean oil cooler | | Entire hydraulic system fails to function | High-pressure internal leak | See your John Deere dealer | | Hydraulic oil overheats | Low oil supply | Fill with correct oil | | Hydraulic oil overheats | Oil cooler air passages clogged | Clean oil cooler | | Hydraulic oil overheats | Clogged transmission oil filter element | Replace transmission filter | | Hydraulic oil overheats | Internal hydraulic leak | See your John Deere dealer | | System overheats | Oil cooler or radiator plugged | Blow air through core and clean | | System overheats | Lack of charge oil flow | Check charge pump and filter | | High oil loss | Loose connections or leaking hoses/O-rings | Tighten connections or replace damaged components |