Shimano road brake isn't springing fully open
10-23-08, 09:28 PM
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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.
10-23-08, 10:25 PM
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Probably needs to be overhauled, cleaned, regreased etc. There is an article on park tools.
10-24-08, 05:38 AM
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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.
Un bolt the cable from the brake and squeeze the caliper by hand and see if it is sticky.
10-24-08, 03:35 PM
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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.
10-24-08, 03:59 PM
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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.
What model brake? Pictures?
10-24-08, 04:39 PM
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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.
10-24-08, 05:00 PM
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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.
10-24-08, 05:53 PM
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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.
