I had the same problem with the brakes on a B75; loosen the bolt in front of the spring that's holding it in place. Remove spring apply grease where it goes into black plastic part and reassemble.
Cheers. I'll probably have a quick go at that, it's a bit annoying as the rack now makes access a bit awkward.
@aggi started
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I had the same problem with the brakes on a B75; loosen the bolt in front of the spring that's holding it in place. Remove spring apply grease where it goes into black plastic part and reassemble.