We had some problems with a hyd unit after sitting all winter.
Got fluid-is the tank at the pump full?
On the SJ the nozzle was stuck unhook the cyl and make sure it is free
could be air in the lines loosen line at cyl ,hit switch and see if you get fluid.
check harness for corrosion at pump unit
does it move at all or only one direction?
I am not an expert I just had same type problems and hope this helps