The EXEN VIBACK Front Assembly VB Series is a powerful, labor-saving dam-use vibrator system designed for concrete placement in hard-to-reach, confined areas where conventional hydraulic shovels cannot operate. This specialized front assembly mounts directly onto 7- or 13-ton base machines, transforming them into efficient concreting tools with four, six, or eight high-performance hydraulic vibrators. The VB Series features a slewing system that allows precise positioning of the vibrators without moving the base machine, enabling smooth concrete placement in vertical, narrow, or cornered spaces. Equipped with the robust HIB150HDL hydraulic vibrator, the unit ensures effective compaction of low-slump, coarse aggregate concrete, with minimal transmission of vibration to the base machine thanks to its unique dual damping structure. The compact manifold-type hydraulic piping enhances safety and operator visibility, while the abrasion-resistant ductile cast iron vibrator tip guarantees durability against harsh dam concrete conditions. Easily integrated into existing excavators and quickly detachable after use, the VIBACK system enhances operational efficiency, reduces labor, and delivers consistent, high-quality concrete compaction in dam construction projects.