[ProjectM96]

Hello. I recently bought an RSS under drive pulley. Kept buying stronger tools with more leverage but I cannot get the old pulley off. Bolt is too tight.

Any help or DIY guides on that?

The RRS UDP came with that tool, but I do not know how to use that tool or why that tool is needed.

What do you guys mean when you say boss or block? And what do you mean when you say it is hard to align the pulley?

I thought all I had to do is remove the bolt holding the old pulley, pull it out, and insert the new pulley+belt.