Hello.
I'm having a problem with my Avid BB7 Caliper.
When i want to adjust the brake on the bigger side with the smaller adjustment button i have a problem.
The adjusment button works fine but only in one direction. When i want to retract it inside the stem-end just falls.
The stem-end has a little spring that goes inside. If i press it down it fits wheel but if i want to retract it from the adjustment wheel it falls off.
What can i do ? Is the spring to loose ?

Here is a photo: