(I posted this to Classic & Vintage yesterday but no replies or even views. I think this might be a more appropriate forum.)
I replaced a set of Mafac pads with Koolstop salmons and they squeal horribly. (It's strange that the Mafac pads didn't give me this problem even though I installed a previously unused set. I suspect it's because they're made of a softer material. That's one reason I replaced them; while they did a fine job stopping the bike they seemed to wear quickly.) I've lightly sanded and cleaned the rims and sanded the pads but it hasn't helped much. I think I need to toe in the brakes but I'm not exactly sure how. Twisting the arms of sidepulls with a wrench is simple enough but these cantis are different animals.
Would you bend the posts of the brake pads? I don't have access to a vice so that's going to be tricky. Plus I'm afraid of weakening the posts or snapping them in two if I have to refine the bend a second or third time.
Would you use a wrench to twist the round part of the brake arm where the pads insert? Seems like that might be easier...the taper of the area just below the round part (looks like the "waist" of an hourglass) might make it easier to bend. However it's going to be a pain because I'll have to take the brake arms off the frame so I don't accidentally bend the mounting posts. I'll also have to remove the brake pad because the screw head will get in the way and won't let me get a good flat contact between wrench and brake. Seems like a very inexact and inefficient method...I can easily see getting it "not quite right" after all the disassembling and reassembling.
I can see how Paul Neo-retros are an improvement in this design with their vertical adjustment slots and the fact that they use brake pads with spherical washers.
Thanks for any advice you can offer...this bike is currently unride-able.If there's anything else I should consider (or any steps I might have missed above) please speak up!