The Allis-Chalmers Model 175 Tractor, a robust utility tractor produced from the mid-1970s to the early 1980s, represents a significant contribution to agricultural and industrial machinery. Known for its user-friendly operation and maintenance design, this tractor was built with the engineering quality and reliability that defined the Allis-Chalmers brand. Its capabilities, often powered by a diesel engine with approximately 35-45 PTO horsepower and a manual gearbox, made it a versatile workhorse for various tasks. The Model 175 embodies the practical innovation of its era, offering owners a dependable machine capable of significant work while minimizing operational costs through its design. This Workshop Service Manual provides comprehensive coverage for the Allis-Chalmers Model 175 Tractor, serving as an essential resource for service, repair, and maintenance. It details procedures for critical systems including the engine, transmission, hydraulics, electrical systems, steering, brakes, chassis, and PTO. The manual offers in-depth, professional-level information, encompassing preventative maintenance schedules, diagnostic troubleshooting, component rebuilds, adjustments, and detailed disassembly and assembly instructions. With clear explanations, specifications, torque values, and wiring diagrams, this manual empowers owners, mechanics, and technicians to effectively maintain and repair their Model 175 Tractor, ensuring its longevity and optimal performance.