I am rebuilding the engine on the above tractor. It has a dual clutch. I have noticed that the there is oil in the clutch bell housing. I assume that the seal on the primary shaft is leaking. BUT I have no idea how to access the seal. I have removed the clutch thrust bearing fork and the 4 bolts that hold the plate around the primary shaft. The plate moves about 1/4 inch but that's it. Can anyone advise what I should do next?