Cummins 3349230 Vibration Isolator Assembly

The Cummins 3349230 vibration isolator is an OEM engine mount designed to attenuate vibration and noise in 5.9 liter B-series diesel engines. It features an M20 mounting stud for secure installation on engine brackets and frame rails. The isolator uses a rubber-elastomer element bonded to metal end fittings to provide resilient support under static and dynamic loads. This part serves as a direct replacement for Cummins part number 3866346 and is interchangeable with Barry Controls LM5-B and ME500-2 mounts as well as Dual Flex DF-477-M3 aftermarket units. Primary applications include Tier 3 certified ISB and QSB engines used in marine propulsion, industrial generator sets, and off-highway equipment. The mount is rated for engine weights between 544 kg and 725 kg when installed in a four-mount configuration, with a maximum load capacity of 181 kg per isolator. Physical dimensions are 165 mm overall length and 87 mm width. The component is manufactured to Cummins OEM specifications for durability in harsh operating environments including saltwater exposure and high-cycle vibration.