The KIOTI DK Series tractors, including the DK45 and DK50 models manufactured by DAEDONG Industrial Co., Ltd., represent robust and versatile agricultural machinery. These tractors are engineered for reliability and performance, offering a solid foundation for a wide range of tasks. The DK45 features a 2197 cc indirect injection diesel engine, while the DK50 is powered by a 1999 cc indirect injection turbo diesel engine, both designed for efficiency and durability in demanding applications. Their construction emphasizes quality, making them suitable for farm work, property maintenance, and other heavy-duty operations. This comprehensive workshop repair service manual provides detailed technical information for the KIOTI DK45 and DK50 tractors. It covers all major systems, including engine overhaul, lubrication, cooling, fuel, intake and exhaust, clutch, transmission, front axle, braking, hydraulics, and electrical systems. The manual offers step-by-step repair instructions, routine maintenance procedures, fluid specifications, tightening torques, and troubleshooting guidance, all presented with detailed illustrations and exploded views. This resource is designed for tractor owners, maintenance technicians, and repair shops to ensure proper upkeep and efficient repair of these machines.