The SM 4483 is an industrial-grade Self Starter Rocker Assembly (Brush Holder) designed specifically for the JCB 3DX Backhoe Loader (12V System). Utilizing a heavy-duty Bosch-style (B.TYPE) architecture with a high-torque 4-brush configuration, this assembly is engineered to withstand the extreme environmental conditions of construction sites. It provides the massive "breakaway" current required to crank the 4-cylinder turbocharged engines found in Earthmoving equipment.