Originally Posted by tommymc

I finally succeeded with a 1/4 drive 10mm socket and extension to push against the opposite arm with the fixing bolt in. Then did the same with opposite sides. The arms came off easily. Good luck.

Originally Posted by CliffordK

Somewhere I have an Allen head bolt that I picked up at a hardware store that was perfect size to slide into the BB spindle, but the head stopped while not interfering with the crank puller.

It pulls the cranks off very nicely.