JCB 802, 802.4, and 802 Super Service Manual (9803/3140) provides comprehensive technical documentation for maintenance, repair, and troubleshooting of these compact excavator models. This PDF manual includes detailed specifications, hydraulic schematics, electrical diagrams, and step-by-step service procedures. Essential reference for technicians, operators, and equipment managers requiring factory-authorized guidance on component replacement, diagnostics, and preventive maintenance protocols.