JD310 - Too much hydraulic oil?

[rScotty]

Any idea what's up with the hydraulic oil on this JD310SG? After running it for a month it works fine, and the level seemed about right in the sight glass when I got it....maybe a little high but not much. But it seems to be creeping up. Tonight I checked a couple hours after shutting it off and still can't see any air space above the oil in the sight glass. Guess I'll let it cool off overnight - although it doesn't seem to run hot. Anyone have any info?
Other than that it seems to run fine.
rScotty

 

[catdozer]

After running the oil will expand some, but are all your booms in the neutral position?( buckets flat on the ground)

 

[Bob Rooks]

What Catdozer said.
Also, if you have a suction side air leak the oil will become aerated and the small air bubbles will displace the oil, but this symptom usually settles out overnight.
I check my oil with all cylinders retracted.

 

[DLTTrekkers]

Were can it(oil) come from ?Hydraulic oil black in couler ? Then from engine . Engine oil getting less ? HYDR PUMP FITTED TO ENGINE ?