If one of your ratchets isn't working, it's most likely just gummed up. I just got some that flopped around.
I unscrewed the plate and found the ratchet part was frozen in place. I got it all apart including sliding the
ratchet pawl out.(looks like a "9") Be careful and don't break the spring, and it should work good as new once
you clean and re lube it.,,,,BD