Posted 5/22/2018 00:00 (#6772711 - in reply to #6772621) Subject: RE: 40 series Deere hydraulics
east central ND
When I ran fans on my 4440 I had to return the oil from the fans to the filter housing or it would cavitate like you say. The rear pump can't pump the oil fast enough to supply the main pump. At that time they recommended running the fans on #3 remote.