This manual covers the CASE 988C / 988P Excavator, a robust piece of equipment designed for demanding construction and excavation tasks. Featuring a diesel engine and a hydrostatic 4-wheel drive transmission, this excavator is built for power and maneuverability on challenging job sites. Its substantial operating weight, approximately 20,000 kg, underscores its capacity for heavy-duty operations. The engineering focuses on reliability and efficiency, making it a dependable choice for professional use. The purpose of this Service and Repair Manual is to provide comprehensive guidance for the maintenance and repair of the CASE 988C / 988P Excavator, with a particular emphasis on its hydraulic system. It details essential procedures, technical specifications, and troubleshooting steps for common issues such as leakage, pump failure, cylinder problems, and control valve issues. This manual serves as an indispensable resource for owners, mechanics, and technicians to ensure the optimal performance and longevity of the equipment.