I have a wd with a hydraulic problem. Sometimes...usually upon first starting up...the hydraulics work normally the first time used. Then they work very slowly, but at normal pressure. Takes at least 30 seconds to raise the loader bucket to full height. Once in a while during subsequent operation it will lift at normal speed for one cycle, then resume the slow-lift thing. All the adjustments are correct as far as I can tell. There is some leakage of transmission oil into the hydraulics and it is a little too thick, but would this cause the intermittent operation. It acts as though only piston in the pump were working. Put some Rislone in but it didn,t help.