Be really careful with a 3-jaw puller! I have some really good ones, and it is very easy to just break the teeth off the crank gear as most of these pullers have jaws that are not designed to really get behind a gear. They grab hold of the teeth, then break them off.
I use a bearing splitter/separator (different device - kind of a clamshell deal) - which gets behind the gear and then has bolts to pickup the outer pulling piece.
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