I don't know the proper term, it's the shaft that goes through the bellhousing. The pedel, linkage and the bell housing shaft all turn like they should, but the clutch will not release. I know on my tractors there is a inspection plate on the bottom side, so you can see and lube the throw out bearing. I don,t know if the dozer has one of these or will I have to take the motor out to see whats going on?