Dexta - More Hydraulics

Here's the deal. I have a 57 Dexta with a frontloader. The rear hydraulics work great, but the front loader works intermittently. There doesn't seem to be any rhyme or reason. Moving the rear lift lever back and forth sometimes makes the front loader work.

Any ideas?

Do I have to overfill the differential/hydraulic to make the front loader work?

1. Changed out the oil. It was milky white, not very good, I think.

2. Filled the differential with 30 hd per the manual. Overfilled by a little less than a gallon to take into account the front-loader. Still problems.

3. Bought a pressure guage and dissconnected the front/aux hydraulic line. With the tractor running, raised the rear hydraulics, and opened the front valve (no dar). No flow.

4. I was very surprised, as I moved the control lever back and forth with the front/aux open, by a stream of oil which shot out, just as I was looking at the end of the hose.

5. So, I reconnected the hose and worked with the front loader for about an hour, then parked the tractor.

When I came back an hour later, the front hydraulics didn't work, and no jiggling or manipulation of the control valve would get them to work.

What gives?

Dave M.