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Avid Shorty 4: Wrench help: binding when torqued up...(5 posts)

Avid Shorty 4: Wrench help: binding when torqued up...Spunout
Oct 7, 2003 8:23 AM
Greetings,

My new Avid Shorty 4 brakes came along with an '03 Jamis Nova (picture coming) and I had one sticky rear brake.

I spent half an hour fiddling with the springs, and couldn't get the right brake to move freely. So, took off the cables, and noticed that the right brake does not pivot smoothly at all. I backed off the mounting bolt, and it turns freely, and adjusts just fine.

Shorty specs show that the mount should be torqued to 7Nm, but I can't get there without binding the movement. I haven't taken the brake apart.

I can take it back to the LBS if time permits, but if I could quickfix it myself that would be no problem.

Fixes: Grease the pivot? Paint on the mount? Bushings stuck?

Any suggestions appreciated,

Michael.
re: Avid Shorty 4: Wrench help: binding when torqued up...richpierce
Oct 7, 2003 9:37 AM
I always grease the pivots after a nice rubbing with 4-0 steel wool. Make sure there's not a thread of steel wool left tho as it acts like a catalyst for rust.

Next trick is to look at the inside of your brake pivot where it rotates on the brake post on the frame and see if it seems scored (scratched up) at all. You can take a drill, wrap it with 600-grit wet or dry sandpaper and spin it around in there. Clean with a Q-tip when you are done.

Next look for grime anywhere in the brake's moving parts. Clean with spray automotive brake cleaner (outside, not near your paint)and grease with a very light grease and clean off excess which is a dirt magnet.

Last but not least try different washers underneath the brake arm mounting bolt and different bolts. If you left a washer off forget all I wrote above and try that first.
re: Avid Shorty 4: Wrench help: binding when torqued up...richpierce
Oct 7, 2003 9:38 AM
I always grease the pivots after a nice rubbing with 4-0 steel wool. Make sure there's not a thread of steel wool left tho as it acts like a catalyst for rust.

Next trick is to look at the inside of your brake pivot where it rotates on the brake post on the frame and see if it seems scored (scratched up) at all. You can take a drill bit (NOT powered by the drill!), wrap it with 600-grit wet or dry sandpaper and spin it around in there. Clean with a Q-tip when you are done.

Next look for grime anywhere in the brake's moving parts. Clean with spray automotive brake cleaner (outside, not near your paint)and grease with a very light grease and clean off excess which is a dirt magnet.

Last but not least try different washers underneath the brake arm mounting bolt and different bolts. If you left a washer off forget all I wrote above and try that first.
Similar problemChicago_Steve
Oct 7, 2003 11:25 AM
I had a similar problem with the Shorty Ti's... Cleaning the brake boss with a scotch brite pad then a nice lubing with Phil's grease seemed to take care of the problem...
Thanks alot! nmSpunout
Oct 7, 2003 11:37 AM