sticky back brake

[Jaloopa]

Drum brake. When I press down on the lever it doesn't return properly. When it gets really bad it won't return until I pretty much come to a stop, and then it comes back up with a click.

My hypothesis is worn brake pads, but I'm making that assumption based on absolutely no knowledge of how brakes work or what the symptoms of dead pads are. Does it sound plausible, or am I barking up the wrong tree? If it is the pads, is it an easy fix, and how much will new parts cost?
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mattsprattuk wrote: but at least the lifan could do like 104mph in 3rd gear

[Nb]

Shoes might be worn, but also common with drums is the mechanism getting covered in crap and slowly seizing up. May only need a good clean and adjustment if your lucky.
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Cbr1100xx blackbird gone, mk4 golf gt tdi chav now
Colin1 wrote 'Im grateful for what i can get, which isnt all that much.'
Columbus travel insurance are crap!! Do not use!

[finpos]

Stop riding it and look up "over-camming". You'll probably fix it with new pads, probably about 20 squid.

f.

[Stelmer]

Strip and grease the mechanism up. I did it on mine and now it works 100% better than it ever has.

Check the pads as well.

[Pete.]

Most likely the cam has worn a groove in the brake shoe bearing-plate. Take out the brake shoes, on the end of each alloy shoe you'll see a small metal plate that the mechanism pushes onto. Look carefully and you will probably see a groove worn in that plate. Most times this can be cured by putting the shoes back upside-down (you will probably have to move the springs to the other side too) so that the cam presses on a fresh bit of the bearing-plate. Sometimes, the plates themselves are removable, so you can flip them over. In the past I have just filed the groove out of the plate which worked well too.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Jaloopa]

Will I need to take the wheel off or can I just strip the brake down in situ?
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mattsprattuk wrote: but at least the lifan could do like 104mph in 3rd gear

[Stelmer]

I just took out the axle bolt and let the wheel drop. No need to upset the chain adjusters.

[pa_broon74]

Hi.

This exact thing was happening with my CLR, changed the shoes TNA, cleaned the cam mechanism also to no avail. I had to stop in order for it to disengage.

Turned out to be the (and this is going to be murder to explain) but here goes: The link bar that connects the foot pedal to the drum break attaches to a thingymajig that hangs down, the bar pulls it forward thus causing it to turn, this transfers through to a flat tab which in turn, turns; pushing the pads out against the inside of your wheel.

You need to clean where the thingymajig goes through the drumbreak casing. Whack on some WD40 then waggle it about to free it up.


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Didn't catch anything.

[Jaloopa]

OK, I think I get what you're saying Pa. I'll go and check that. Did your brake squeak when slowing you down while this was happening?
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mattsprattuk wrote: but at least the lifan could do like 104mph in 3rd gear

[Jaloopa]

All sorted now. It only needed a clean out. I took it to RXS100_Chris's house since he's got a jack, and with his help and surprisingly little swearing we took the brake apart and greased the stickiest bits, and gave it all a good clean. It's better now than it has been in a long time, and as a bonus I now know a bit more about drum brakes.
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mattsprattuk wrote: but at least the lifan could do like 104mph in 3rd gear