Hitachi 4123994 Front Engine Mounting Rubber Cushion

This front engine mounting rubber cushion is designed to replace Hitachi OEM part number 4123994. It functions as a critical vibration isolation component between the engine block and the excavator frame, reducing structural fatigue and operator cabin noise. The mount features a bonded rubber-to-metal construction with a central threaded bolt and flanged base plate for secure attachment. It is compatible with Isuzu 6BG1 and 6BD1 series diesel engines commonly installed in the Hitachi EX200 series hydraulic excavators. Cross-references include Hitachi part numbers 4248362, 4255652, and 2016999. The component is sold as a kit of two pieces per engine application.