Thanks Mike. I did use a light hammer but I do have heavier ones at work and I did use WD40. As for a disengagement pin, I didn't see one when I looked down in the top of the winch. I did see a small circular pattern in the bottom that I assumed was a machining mark but never had looked in there before so I never knew there was a pin. Reflecting on what I observed it could have been about 1/4 inch diameter and I never sprayed it. Darn it!!!!
Mike is correct. The is a vertical pin in the middle of the winch handle hole that pushed down and disengages the electric motor on the winch. Also, on my Oceanis 45, there is a circlip that holds the top on. I don't remember if the 40 electric winch has the circlip or just rotates off. I would also use a heavy spray of water around the collar to flush out any salt or grime. Then, a penetrating oil and let sit for a few hours or days.