The other day I shear one of the shear pins on my snow thrower tines I had replaced but the tines are not moving at all. (I hit a cement step while clearing the snow of a neighboard's driveway) Could some one let me know where I should start looking at? I don't want to disassemble more than I don't have to.

I would check the transfer case that redirects the turning shaft from the engine to the auger drive shaft. Should be visible and easily accessible from the front.