You can buy a dedicated tool to compress the spring, but I was able to get mine apart and back together with some all-thread, nuts and washers, and a ball joint tool with an opening big enough to get at the snap ring. I've been able to get the older button clutches apart using my foot to compress the spring, but those come apart a little differently; you might be able to get it by hand with one person compressing the spring and the other handling the snap ring though. Either way, the snap ring pliers is the only dedicated tool you definitely need. You won't hurt anything as long as you're careful about it: make sure you're compressing roller assembly evenly, and don't force anything. A copy of the service manual would be helpful. Anyway, I can't say something's definitely broken; it's just that if it were me, I wouldn't want to take it very far until I got it all apart and made sure nothing was broken (or obviously, take the secondary to a shop that can check it over and fix if necessary)