Shimano 600 brake adjustment. Am I missing something?
07-15-19, 05:15 PM
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Shimano 600 brake adjustment. Am I missing something?
I see no way to adjust the front and rear brakes with a barrel adjuster.There is a barrel but I see no way to turn it. This is on an 86 Miyata 912.
07-15-19, 05:47 PM
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That nut that looks like a washer should turn and screw the adjuster out.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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07-15-19, 05:48 PM
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The adjuster is the part just above the brake arm, the second pic shows the rubber removed. It is threaded and as you turn it the inner cable holder will rise. Sometimes it helps to take off the cable tension by squeezing the caliper together against the rim.
Edit - Whoops, too late!
Edit - Whoops, too late!
07-15-19, 05:49 PM
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Where there was the rubber o-ring thingy was is a nut. It will turn to adjust the tension. It may be a good idea to remove the wheel, pinch the brake closed with your hand, and wrestle the nut loose. Or loosen the pinch bolt and dismantle all of it and lube it good.
07-15-19, 05:58 PM
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I'm not familiar with these brakes, but you should be able to turn the nut between the conical nut at the top and the brake arm - that will lower or raise the conical nut. See how the thread has flats on it where it protrudes? That locks in to the rectangle hole in the brake arm so it doesn't turn when you make the adjustment. Does that make sense?
Edit: everyone jumped in while I was making a coffee.
Edit: everyone jumped in while I was making a coffee.
07-15-19, 05:59 PM
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The nut is cammed on the bottom, so every half turn will seat itself so that it doesn’t back off the tension preload.
07-15-19, 06:06 PM
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07-15-19, 06:08 PM
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I tried turning it but it is round and doesn't want to turn.
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07-15-19, 06:28 PM
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07-15-19, 06:36 PM
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07-15-19, 06:47 PM
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The barrel does not rotate nor thread into the brake arm for this kind of adjuster. It has flats to prevent it from rotating in the arm. The thumbnut is not a locknut, it is the adjuster which lifts the threaded shaft on the barrel and is indexed to the arm instead of having a locknut.
07-15-19, 06:48 PM
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07-15-19, 07:11 PM
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Thanks. I think mines just stuck from non use. I'll try shooting some oil on it.I don't know why they don't make it knurled like on my other bikes.
