JCB 32008651 Belt Tensioner Assembly

The 32008651 automatic belt tensioner is engineered as a direct replacement for JCB backhoe loader applications. It features a spring-loaded pivoting arm with integrated idler pulley to maintain consistent serpentine belt tension across engine speed and load variations. The assembly includes a sealed bearing pulley and calibrated torsion spring mechanism designed for heavy-duty construction equipment duty cycles. This tensioner replaces multiple JCB part number variants including 320/08651, 320-08651, 320/08584, 320/08657, 320/08759, and 320/A8586. It is compatible with JCB 3CX, 4CX, 3C, 3D, and 1400B through 1700B series backhoe loaders. The unit mounts to the engine front accessory drive bracket and requires no adjustment during installation.