Purchased an older home built log splitter. 6.5 tecumseh Gas engine. Controls and ram from an old dozer I am told. Has not been used for the last couple of years. Engine fires, pump seems to be working. The pump is a John S Barnes pump (single stage is what I was told.) Pressure gage on inlet of the control valve shows 3000 psi. The ram moves freely both directions but does not have enough force to split wood. Owner thought it was a pump issue but I am more inclined to believe maybe the control or the ram itself are the culprit. Any help would be appreciated..