Belt tensioner issues

I am new to the group and need some expert advice. I am replacing the alternator on my 2003 Tundra 4.7. I cannot get the tensioner to move at all. Any one have some good advice?

 

Are you rotating the correct direction? It goes the opposite of what you may expect.

https://www.youtube.com/watch?v=dhlk7YUO_8A​

 

Also worth mentioning if you haven't messed with belt tensioners before and are using small-ish hand tools, the springs can be pretty stiff inside them.

 

Totally. Those Mountain wrenches dude is using are the same ones I have. I wouldn't attempt this job without using at least an 18" breaker bar for leverage.

 

I changed my tensioner out with stubby wrenches. My poor princess hands were in rough shape afterwards.

 

Put yer purse down Mike and give 'er hell!! Good luck sir.