CAT Common Rail Adjustment Shim

CAT CR Adjustment Shim - 077-142

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Cat Adjustment Shim is a critical calibration component used in Cat diesel engine blocks, designed to maintain injection pressure stability under high pressure and enhance the precision of the fuel injection system. By precisely regulating the amount of fuel injected across nearly the entire operating range with micron-level accuracy, it supports stable engine operation at all RPM levels, contributes to maximizing power and efficiency, and helps minimize emission levels. Specifically engineered for Cat engine technologies, this high-precision component serves as a standard part of Cat common rail injection systems. Used particularly in heavy-duty Cat truck engines, this specialized component stands out with its superior surface quality, high wear resistance, and excellent fatigue strength. Manufactured with high dimensional precision through advanced lapping and surface finishing processes, it ensures strict tolerance compliance and provides a long service life.