Originally Posted by dedwards0323

I do have a 12" strap wrench in my tool box, but that is for small jobs that don't require much holding power. One needs a heavy-duty strap wrench (see attached) to hold a pulley to loosen a bolt torqued to 150 ft-lbs. If I can get that strap wrench on & secured, the crank holding bolt comes loose. I know there may be doubters about this, but I've done this multiple times in similar applications and know it works.

And I agree that the holding bolt needs to be replaced if this service is performed. Not worth the risk to have to do this again due to a bolt failure caused by fatigue from previous pre-load.