That’s a common problem. If you have a pair of smooth jawed pliers you can bend the inner coil in so that it presses against the arbor hook. Just grab the inner coil about 3/4 of a turn back from the hole and squeeze and bend inward a little then release the plier, move a little closer to the end and bend it a little again. Keep doing this until the end of the spring presses slightly against the arbor hook. You’ll know when your are there when you can turn the arbor and the hook catches the hole in the spring without having to physically push the spring towards the arbor. I use a pair of parallel jaw smooth faced pliers but any smooth jawed plier will work.