Squeaking Rear Drum Brakes

[buddyearl]

Have a new 50cc moped and rear drum brakes squeak. What can I do to eliminate the squeaking?

[Pony66]

Ride it more:) Really they just squeak a bit. You could take everything apart and rough up the shoes. Try to find a long hill and go down hitting the breaks, maybe they will break in faster.

[skuttadawg]

Its normal to squeak since vibrations emit sound . There is grease to put on sides not the contacting shoe or drum . If greased they should not squeak unless worn down . My TaoTao squeaked from day one , but fixing requires rear wheel and exhaust removed grr . I mostly used the front disc since has more braking power and I hate to hear it squeak . You might need shims to keep shoes tight so they do not wiggle . I would not use brake silencing spray as it may get on shoes or drum causing a braking power loss . The easiest thing to try is adjusting the cable but turning the nut on the end . Be careful not to overtight as cables stretch and break from normal use .

Thats another reason to have rear disc brakes , better stopping , no cable to break and simple to replace pads since you do not have to remove the wheel .

Maybe one day someone will have a drum kit thats hydraulic ( uses brake oil ) instead of cable like cars ) . Discs can be replaced but since drum is made into wheel you may need to replace wheel when drum is worn out

[mainepeace]

I haven't been able to figure it out. I sand the drum case and clean it out with acetone. I sand the brake pads. Squealing still happens. It's not just a small squeak, but a penetrating SCREECH that makes everyone's head turn when I brake.

It's very weather dependent. When it's really hot and humid they squeal more than when it's cooler and dry, but when it gets cold they squeal again. It's annoying because only two of the 24 brakes that I currently own squeal.

Greg

[TERRA NUVO]

buddyearl, don't worry about it, every beautiful woman has a scar somewhere.


Greg great observation.

mine do it every morning

[scooterguy18]

Wire wheel the shoes and turn em over. Use a Dremel with a cylindrical sanding attachment and brake fluid and scuff the wheel hub-sort of a honing. Dont forget to clean off the fluid before install. (mark the shoes with a sharpie so you know which side was out so you can turn em) Night and day brother. Sorry, some come with a squeal that just gets worse over time and I cant live with that. Adjusting the cable usually works......on a Yamaha, or a Honda. But Ive found on the sumyungguyonehunglo scooters its a temporary, short lived fix. A newbie will do that too often and wind up with drag, stretched cable(or broke), and worn shoes. Dont be lazy. (grr) Drop the pipe, pull the wheel, and do the damn thing. Giterdone!!

[yoshidawg]

I had this problem. Took the wheel off, new shoes sanded the drum scuffed put disc brake quiet compound on the backs of the shoes. that worked for about two rides. Then I got these slotted shoes and repeated the process now my rear brake no longer SCREAMS out to the world that I'm here.

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[Pony66]

Sept 22, 2011 1:27:12 GMT -5 mainepeace said:

I haven't been able to figure it out. I sand the drum case and clean it out with acetone. I sand the brake pads. Squealing still happens. It's not just a small squeak, but a penetrating SCREECH that makes everyone's head turn when I brake.

It's very weather dependent. When it's really hot and humid they squeal more than when it's cooler and dry, but when it gets cold they squeal again. It's annoying because only two of the 24 brakes that I currently own squeal.

Greg

Im guessing that something is wrong with the shoes. Have you tried another pair of shoes? Im thinking some oil or grease penetrated the pads sometime. Maybe something is off on the casting that the shoes dont apply correctly and some of the shoe is touching the drum? Maybe there is something metalic in the pad?