The Kubota KH51/KH61 series represents a line of versatile compact excavators, engineered for reliability and performance across various demanding applications. These machines, produced over various years, are characterized by their robust construction and efficient diesel engines, often featuring hydrostatic transmissions for precise control. Their compact dimensions and operating weights make them ideal for navigating tight job sites while still delivering the power and functionality required for excavation, landscaping, and construction tasks. The focus on durable engineering ensures these excavators are a dependable asset for professionals and owner-operators alike. This comprehensive Repair Service Manual provides detailed technical information and procedural guidance for the Kubota KH51/KH61 models. It covers essential maintenance schedules, fluid specifications, and capacities, alongside in-depth instructions for disassembly, assembly, cleaning, and reinstallation of key components. With step-by-step repair procedures and critical specifications, this manual is an indispensable resource for professional technicians and DIY mechanics seeking to maintain, diagnose, and repair these excavators effectively, ensuring their continued optimal performance and longevity.