Hi Dotball, and a big warm welcome to the forum. It is great to have another Scott Bonnar owner on board.
With your problem, all you have to do is remove the nut on the end of the roller shaft, and with a rubber mallet or a small block of wood and hammer; gently tap the end of the shaft (so as not to damage the thread) and it should slide out, releasing the roller. Note: one end has a 'T'section of metal welded to it, that wraps around the height actuating arm, but is
not attached to it.....as per the diagram above.
Please let us know how you get on.
