I'm trying to remove the crankarms and BB from a Trek 520. The bike is circa 2006 according to the previous owner. They are labeled "FC-5502/5505" on one of them and "FC-5505" on the other. "HollowTech" also is written on at least one of the crankarms but it's very faded and hard to see.
I've watched some Park tool videos on the subject (https://www.parktool.com/blog/repair-help/crank-removal-and-installation-three-piece) and they seem to say if you have an 8mm crank bolt, then to use the square tapered crank puller (I do have a CCP-22 already). But they also say that if there are 8 splines on the inside, to use the Octalink/ISIS crank puller (CCP-44). Well this is an 8mm bolt and it seems to have 8 splines on the inside!
Shimano has some documentation here: https://si.shimano.com/pdfs/si/SI-1DG0C-000-ENG.pdf This seems to suggest that I need another special tool (the TL-FC15).
Question 1: How do I get the crank off? Do I need the TL-FC15? If so, can I use that with my CCP-22 or do I need Shimano's TL-FC10?
Question 2: I haven't been able to get the non-drive side crank bolt off. This is also an 8mm hex bolt but it's stuck on really hard. Before I bring out my breaker bar and/or impact driver, would the non-drive side be reverse threaded? Don't want to break anything here.