The JCB JS145W is a robust wheeled excavator designed for demanding construction and material handling applications. Featuring a powerful Cummins QSB4.5-C140 turbocharged diesel engine delivering 104 kW (140 hp) and a hydrostatic 4WD transmission, this machine offers reliable performance and efficient operation. Its engineering prioritizes durability and productivity, making it a valuable asset for various heavy-duty tasks. This workshop repair service manual provides comprehensive guidance for maintaining and repairing the JCB JS145W Tier 3. It covers essential procedures, technical specifications, troubleshooting steps, and safety guidelines necessary for optimal vehicle performance and longevity. Owners, mechanics, and technicians will find detailed information to ensure the machine operates at peak efficiency and safety standards.