Technical & Reference Section > Tech and Restoration
AD990 set up help
Lpodonovan:
--- Quote from: Andyboy77 on September 09, 2016, 01:06 PM ---
--- Quote from: Lpodonovan on September 09, 2016, 09:31 AM ---Difficult to see but these arms are touching each other and are slightly rubbing when pulling brake lever
--- End quote ---
In this case I would try a suitable washer at the upper arm to lift it just enough to get rid of the rubbing isssue. :daumenhoch:
Regarding the other issue, I don't know about any adjusters that long so that it would go through the frame tube. But that doesn't mean they don't exist. Can you fit a piece of an outer cable there to prevent it from rubbing agianst the frame?
--- End quote ---
Thanks if I fit a washer exactly where would it go?
I've just been given a length of outer cable (from a modern mountain bike) it's clear and very small in diameter
pickle:
are they rubbing when the cable is under tension and set up correctly? or are they rubbing when loose? as the arms are thinner where they would normally cross over. I wonder if you're seeing the rubbing before you've set it up correctly?
apologies if you have and this comes across as a bit silly ;D
Andyboy77:
--- Quote from: Lpodonovan on September 09, 2016, 03:16 PM ---
--- Quote from: Andyboy77 on September 09, 2016, 01:06 PM ---
--- Quote from: Lpodonovan on September 09, 2016, 09:31 AM ---Difficult to see but these arms are touching each other and are slightly rubbing when pulling brake lever
--- End quote ---
In this case I would try a suitable washer at the upper arm to lift it just enough to get rid of the rubbing isssue. :daumenhoch:
Regarding the other issue, I don't know about any adjusters that long so that it would go through the frame tube. But that doesn't mean they don't exist. Can you fit a piece of an outer cable there to prevent it from rubbing agianst the frame?
--- End quote ---
Thanks if I fit a washer exactly where would it go?
I've just been given a length of outer cable (from a modern mountain bike) it's clear and very small in diameter
--- End quote ---
I've just had a look at a few pictures of a bike like yours. Obviously all cables are rubbing against the hole. At least I couldn't find a single picture that showd me somebody was trying to solve that problem. But if you are still concerned about the cable could snap at some point in time, try that piece of outer you've been given.
What pickle said is also very interesting. His question brought something to my attention, I've completely overlooked so far. All your pictures are without a rear wheel. To set a brake up propperly, I think there should be a rear wheel fitted too. As long as there is no tension to the brake cables, arms rubbing against each other doesn't seem to be too strange to me. So maybe you may put a wheel in, set up the brakes as you like 'em to be, and then look if the issues are still there.
If, I would try to fit the washer there to lift the arm up a tiny bit: :daumenhoch:
Lpodonovan:
--- Quote from: pickle on September 09, 2016, 03:47 PM ---are they rubbing when the cable is under tension and set up correctly? or are they rubbing when loose? as the arms are thinner where they would normally cross over. I wonder if you're seeing the rubbing before you've set it up correctly?
apologies if you have and this comes across as a bit silly ;D
--- End quote ---
Thanks for the comments it most certainly doesn't come across as silly. It really is my first time setting up an AD990. All my bikes have pitbulls so I'm the novice here
They do rub when set and when not so I think it's the frame mounts just not being 100% (forgive me nosepickben for claiming that discovery as my own). I think a small amount of filing is necessary and the next time I'm near someone with the bike who knows how to set these up correctly a bit of fine tuning
oldtired:
sometimes the bushes on 990's are out a bit ,they're pressed in , worth checking at least ?
an s&m with misaligned brake mounts ........... never ...... :-X :LolLolLolLol:
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