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Okay, my idea didn't work. Okay, a sprocket brake assembly is pretty much as simple as a "rod" with a sprocket in the middle. When you take the dust cover off the back, you stick a screwdriver in the hole, and turn the sprocket. If you are turning the sprocket the right way, it pushes out on the rod it attached too, and presses the brake shoes out, forcing them into the drum. Hence, it tightens your brakes.
Now, the lever is harder to explain. It is a flat piece of metal about 1/2 inch wide, and about 1 inch wide in the middle, from one brake shoe to the other. Say we are looking at the brakes, with the drum off. The left brake shoe, and the right brake shoe. in between them is this metal flat piece, which is basically in two pieces. the left brake shoe, has the left metal piece, it comes to the middle where it meets the right metal piece. The left metal piece has a half "C" shape cut into it on the end, making it rounded, with little gears or teeth on it. The right metal piece is the opposite, a half "c" that is cut into it, making it concave, with matching gears or teeth. both pieces meet here in the middle and fit together. then the right metal piece attaches to the right shoe. What holds the two pieces together is the spring. now, by simply spreading the springs and moving one "gear" out or in, it puts the left metal piece further in or out of the other piece, puts tension on the brakes. I figured out how they work, no problem, with the drum off. now, with the drum on, I can't adjust the darned thing. For those of you totally confused, which I am myself, let me brake the "metal piece" thing like this.
say you have a solid piece of wood,say a 2x4. in the middle of the 2x4, cut it in half at like a 45 degree angle. sorta like this.
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now, if you push the two together,they meet perfectly, then push harder, one slides "up" on the other. imagine the brakes are attached to the outside of these pieces, and the tension would be eased. slide them apart, and the tension is increased. Okay, who is confused??!!?!
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