Deere 4720 Hydraulic Drive Probelm??

[Brown Dog]

Idk about trans but my 4720 Open station has a p/s in-line Hex Filter under Left floorboard on side of trans area. Mine stops up & steering gets stiff.
I take it apart & clean small screen inside the hex shaped coupling.

 

[gkevin9]

Somehow the inline filter screen was flattened on itself inside the hex housing. It did not look dirty. I have a new one one the way. No idea why 5his happened.

 

[Kyle_in_Tex]

I don't think that's the correct picture...

 

[gkevin9]

]

 

[gkevin9]

 

[Kyle_in_Tex]

Somehow the inline filter screen was flattened on itself inside the hex housing. It did not look dirty. I have a new one one the way. No idea why 5his happened.

Where does that filter go?

 

[gkevin9]

Inside the hexagonal inline hydraulic filter under the floorboard.

 

[Kyle_in_Tex]

Glad you found the culprit.

 

[gkevin9]

Yes, me too but why did it fold in on itself?

 

[Kyle_in_Tex]

Yes, me too but why did it fold in on itself?

Good question. Unless it was physically damaged, only pressure or vacuum could act on it or both. It it got clogged the pressure differential probably did it in. You need to look at it under a microscope for what might have clogged it.

Hate to tell you this, but if your oil got really, really hot, you might want to change it. Not sure if there is a "smell" test or anything to make sure it is good. I'll let the hydraulics guys chime in here.