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Old 02-13-10, 06:38 PM   #1
tsappenfield
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Raleigh brakes for dummies

A few weeks back, I posted a photo and question about the "self-adjusting brake experiment" by Raleigh in the early 1970's. Nobody seemed very interested. There has to be a lot of these brakes around. I'm trying to understand how they work. In the meantime, I've taken mine apart and replaced the brake cable. I'm aware of the rachet mechanism, but I still don't get how the brakes are supposed to work. Any engineers out there that can explain this in "I'm a little slow" terms?

TSapp
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Old 02-13-10, 07:41 PM   #2
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More accurately, they don't work. You're best off opening the mechanism, removing the spring, then Locktiting the adjuster threads. Replace the cable housing stop on your brake calipers with the type featuring built-in adjuster barrels.

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Old 02-14-10, 04:35 AM   #3
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Raleigh has em...

My understanding is that as the pads wear, the lever will move more. When the lever moves a predetermined amount, the next cog on the self adjusting mechanism (the little splined wheel) is allowed to engage and the brake will adjust itself a touch tighter. In other words, the mechanism automatically screws the brake cable adjusting screw a bit tighter.

Do they work? That I cannot comment on. I have owned three Raleigh Superbe roadsters and the brakes all worked fine. I even loosened one of and then tested the self adjusting feature. It seemed to work OK but I do prefer to set my brakes myself. Also, being made of steel (some plastic also), the levers are heavy and cumbersome looking.

At any rate, here is a picture of the brake lever in question, for those of you who are unfamiliar with the component.

RaleighSuperbe2_BrakeLever.jpg
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Old 02-14-10, 08:15 AM   #4
tsappenfield
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Randy,

Thanks for the explanation. That makes all sorts of sense. Now my question is, when I attach the new cable to the calipers, do I screw the splined adjuster all the way in or partially in? What do you think?

Terry
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