The SM 1404 is a heavy-duty Self Starter Rocker Assembly (Brush Holder) designed for mid-to-large scale hydraulic excavators. This assembly is specifically engineered to meet the high-torque cranking requirements of the Komatsu PC 130 and the Hitachi Zaxis 330 series. Featuring a robust 4-brush configuration, it provides the high-amperage current path necessary to start large-displacement industrial engines in extreme weather and site conditions.