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20170227_180449.jpg | Hits: 171 | Posted on: 2/27/17
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This is the piston. Well, its less of a piston than an extension of the piston. I'm going to call it a "piston follower". The actual piston is a rubber ring. This piece sits on top of the rubber ring and transfers force to the clutch release bearing, which in turn presses against the fingers in the pressure plate. The bottom portion rests against the rubber piston seal, and the whole assembly is pushed out using hydraulic pressure when you step on the clutch. Its hard to tell from these pictures, but notice that the bottom portion is not smooth, and instead is covered with burrs. These burrs are solid, and are present around the entire base. I've cut many pieces of plastic pipe in my day, and if I had to guess, these burrs are from the (lack of) machining process during construction. The burrs are fused to the unit, which makes me assume that the factory uses (inadequate) heat to smooth the surface after cutting.
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