The JCB Fastrac, encompassing models such as the 2115, 2125, 2135, 2140, 2150, 3155, and 3185, represents a significant advancement in tractor design, pioneered by JCB to offer unprecedented road speed and versatility. These machines are engineered for demanding agricultural and transport applications, combining robust construction with innovative features that enhance efficiency and operator comfort. The Fastrac's development, originating from J.C. Bamford's vision, aimed to bridge the gap between traditional tractors and road vehicles, a goal achieved through advanced suspension, powerful diesel engines, and sophisticated transmission systems, earning industry recognition for its impact and benchmark-setting capabilities. This comprehensive Factory Service Repair Workshop Manual provides in-depth coverage for all repairs, servicing, and troubleshooting procedures for the JCB Fastrac series. It details critical systems including the powertrain, transmission, drivetrain, hydraulics, brakes, steering, electrical systems, chassis, and bodywork. With hundreds of pages of highly detailed, professional mechanic-grade information, complete with numerous photos, diagrams, and exploded views, this manual guides users through routine maintenance, complex diagnostics, component disassembly and reassembly, and complete system overhauls. It is an essential resource for professional mechanics, service technicians, farm equipment repair specialists, and owners with advanced mechanical skills seeking to maintain and repair their Fastrac vehicles with factory-level precision.