2724795 Coupling G Fits Caterpillar ModelsOne New Aftermarket Replacement Flexible Coupling (Coupling G) for Caterpillar (Cat) Hydraulic Excavators This aftermarket replacement flexible coupling (Caterpillar designation: Coupling G) connects to the main hydraulic pump on Cat excavators powered by the 3066 engine. The flexible coupling absorbs torsional shock and vibration between the engine and hydraulic pump, protecting both components during operation. Replacing a worn or damaged coupling
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