I have a 28ton Huskee log splitter. I have been using it for 2 years with no problem. On this occasion I was returning the ram back to the top position and all was working fine. When I tried to extend the ram to split, the ram started moving ridiculously slow. It moves slow in both directions now. I replaced the dent valve, did not fix. It looks like the lovejoy is spinning from the motor to the pump so it is not sheared(at least not internally). I am changing the oil and filter today hoping that it may be a clogged filter. Are there any other checks that I can make? Like removing a hose and cycling the valve to see if I have oil movement? If I leave the dented in the return position the pump builds up pressure to reset the valve.