The O.P. stated he is able to drive the tractor, which proves the transmission pump is functioning at least well enough to engage the PermaClutch and the quad range planetary two-speed (IF so equipped). As part of the troubleshooting procedure it will be necessary to determine for SURE that there's enough excess flow to feed the main hydraulic pump.
Also, there's a POSSIBILITY of a huge internal ''leak to sump'' of the output of the main hydraulic pump.
One REALLY needs a copy of the factory service manual and follow the diagnostic tree found there to get to the bottom of what's going on with certainty.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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