alternator pulley

[ct-hdi]

right my alternator pulley is tweeting (sounds like a tensioner noise).. I cant see if there is a bolt without taking the alternator off..

So my question is, does the alternator pulley unbolt? and if so, is it possible to swap it with a clutch pulley such as: Pulley

This should solve my problem, reduce stress on the crank pulley when turning off, also, hopefully solve the problem of why my battery warning light comes on occasionally when it rains

thanks