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  1. #1
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    Shimano road brake isn't springing fully open

    I'm working on a front brake from a 2005 Trek 1000 and its not springing full open. There is a little bit of squeaking from the collar around the spring. I suspect the next step is taking the thing fully apart, cleaning it, lubing the right parts and reassembling. Before I do that I thought I'd check here and see if anyone had better advice.

  2. #2
    that bike nut BikingGrad80's Avatar
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    Probably needs to be overhauled, cleaned, regreased etc. There is an article on park tools.

  3. #3
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    Could be the cable starting to fray also.
    Everything should be as simple as possible...But not more so.---Albert Einstein

  4. #4
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    check your housing and cable. There may be corrosion in the housing. I overhauled a brake before because I thought it was the brake sticking (its still needed it) but in fact it was a badly corroded cable sticking in the housing.

    Un bolt the cable from the brake and squeeze the caliper by hand and see if it is sticky.

  5. #5
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    The brake springs back fairly well when its off the bike. it stops springing back properly when i place it back on the bike and tighten the mounting. do i need to take apart the the brake assembly and clean it? am i simply over tightening the mount? its really not on that tight.

  6. #6
    Senior Member DannoXYZ's Avatar
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    Quote Originally Posted by mattkime View Post
    The brake springs back fairly well when its off the bike. it stops springing back properly when i place it back on the bike and tighten the mounting. do i need to take apart the the brake assembly and clean it? am i simply over tightening the mount? its really not on that tight.
    Sounds like the pivot-bolt locknut isn't locked correctly to prevent the arms from getting pinched when you install the brake. You might also want to drip a drop of oil onto the spring where contacts the caliper-arm.

    What model brake? Pictures?

  7. #7
    Senior Member bluenote157's Avatar
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    I had some older dura ace calipers.. and the bushing/washers got so gunked up that under pressure they would stick like the OP described.

  8. #8
    Great State of Varmint Panthers007's Avatar
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    A brake -set that old deserves a full overhaul and new cables and housing. Do oil the new cables - not grease as they can turn to glue in the plastic or teflon inner cable-housing. Clean and oil all the parts. That should take care of them. Just think about doing this sooner this next time.
    How do you keep an idiot in suspense?

  9. #9
    cab horn
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    Quote Originally Posted by Panthers007 View Post
    A brake -set that old deserves a full overhaul and new cables and housing. Do oil the new cables - not grease as they can turn to glue in the plastic or teflon inner cable-housing. Clean and oil all the parts. That should take care of them. Just think about doing this sooner this next time.
    No new brake cable and housings, and especially derailleur cable/housings need to be lubed.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

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