How do I remove the crank? Some weird part is in the way..

[id5000]

Looks like I need a key of some sort?
I'd like to try to have violence as a last (or at least second or third) resort here..

Showed the pic to a guy at my hardware store, he said he didn't have a clue :/

 

[id5000]

Or.. maybe it's a hole for a flat head screwdriver?

 

[socal_jack]

Looks like an old school dust cap. Hit it with some PB Blaster or similar penetrating lubricant first, then stick a screwdriver in the slot and unscrew it, but take it easy the threads damage easily. If it resists let it soak awhile and try again, if the cap is a dissimilar metal to the crank sometimes there's some galvanic corrosion. After it's out, clean the threads really well before using a crank removing tool on it.

There's a chance that's one that just pops off, can't tell though.

 

[id5000]

Thanks, gonna try that out tomorrow!

 

[Joe Poncho]

For sure it's an old dust cap. I remember them well!