goeduck
Super Member
I would put a come-along winch on it between two trees with an angle so the end with the small shaft is pointing up. Tension it and fill that groove with penetrating oil. I’d keep adding oil if it seeps in. Leave it for a few days and add tension and heat if need be. I would also give the thick end some good taps with a maul if It doesn’t look like you could deform it. Many PTO shafts are thinner metal.