This manual covers the JCB 3C construction equipment, manufactured by JCB. Designed for industrial and construction environments, the JCB 3C is powered by a diesel internal combustion engine, specifically the Leyland 38TD and 4 98NT variants. These engines, with a displacement of 4.98 liters for the 4 98NT, are naturally aspirated and utilize diesel fuel. The robust engineering of the JCB 3C ensures reliability in demanding operational conditions, making it a dependable choice for heavy-duty tasks. This Service Repair Manual provides comprehensive information essential for the maintenance and repair of your JCB 3C. It details engine service procedures, including recommended oil types and service intervals, along with technical specifications and operational guidelines. The manual is intended to assist owners, mechanics, and technicians in understanding the equipment's systems, performing routine maintenance, and addressing potential issues, thereby ensuring optimal performance and longevity of the JCB 3C.