Originally Posted by
HillRider
Once the bolts or nuts are removed you need a specific puller to remove the crank arms from the spindle. However, the crank you show has the chainrings (aka the "sprockets") riveted to the spider arms and they can't be removed or replaced.
There is the possibility that the two cranks might be similar enough that you could switch them; the only way know for sure is to do the switch and see if it works.