>>1062503So by crank tool you mean an extractor like this pic?
This will just let you take the crankarms off the axle.
https://www.youtube.com/watch?v=cPQyQnNdewsFor you to be able to replace the bb,
https://www.youtube.com/watch?v=yBnYoYVTnloyou will also need a bb wrench, most likely one like this for a square taper bb
http://www.parktool.com/product/bottom-bracket-tool-bbt-22(there are some square taper bbs that need a different one, but those are rare).
Be aware that, especially if your cranks are aluminum and even more so if the bike has seen some salt in winters, they might be seized to the axle. Spray some wd40 in there where crank's inner square surface sits on the axle. If you got very bad luck, you might end just stripping the puller thread instead of pulling the crank off (more chances to that if you got a cheapo 5$ chink puller).
In that case something like this will need to be done
https://www.youtube.com/watch?v=jrpIoXxVyTsTo prevent cranks become seized on your new bb, put some grease on the axle.
>all the money I spentConsider buying tools as an investment that will let you fix your bikes yourself in the future, not just this bb right now. Even if you buy a new bike, parts will eventually wear out and need replacing.
