Posted 6/23/2022 07:05 (#9717309 - in reply to #9716739) Subject: RE: JD 6620 Fuel Issue
Stuff that grows in the fuel will look like brown or black snot when you tap the old filter on something to dislodge it.
Combines are noted for growing this kind of stuff in the off season and also for having chaff etc in the tank.
It may be you just need to clean the two sediment bowl screens mentioned above and change square glass filter, but if you get repeated clogs of the screen in the sediment bowl under the tank or the sediment bowl/valve fitting itself clogs and fuel won’t run out of the tank freely, it’s time to drain and rinse tank.
I’ve taken an electric transfer tank pump with a filter and set it in a bucket under the combine tank so I could filter the (treated) fuel and put it into my transfer tank where it would be filtered again before being put back into the combine. Buy an extra filter or two!
Fought this problem with a 4420 one year and it sucks. Screen in sediment bowl would clog every 15 minutes until we finally bit the bullet and cleaned the tank.