The Kioti Daedong DK50S, DK501, DK55, and DK551 tractors represent a line of versatile and reliable machinery, typically produced from the mid-2000s to the early 2010s. Manufactured by Daedong Korea Co., Ltd., these tractors are known for their robust construction and capability, making them suitable for a wide range of agricultural tasks and property maintenance. They offer a balance of power, with models around 50-55 gross engine horsepower, and practical features designed for efficient operation. The DK series is recognized for providing good value within the compact tractor market, emphasizing functionality and durability for users. This workshop service repair manual provides comprehensive guidance for the Kioti Daedong DK50S, DK501, DK55, and DK551 models. It covers all essential systems, including detailed procedures for engine overhaul, fuel, cooling, lubrication, transmission (manual and hydrostatic), axles, steering, brakes, hydraulics, and electrical systems. The manual also includes routine maintenance schedules, troubleshooting guides for diagnosing and resolving common and uncommon issues, and step-by-step instructions for repairs and component rebuilds. With over 500 pages of detailed information, this English-language manual is an indispensable resource for owners, service technicians, and agricultural mechanics seeking to maintain and repair these tractors effectively.