The Kubota KX91-3S, KX101-3, KX121-3S, and KX161-3S Mini Excavators are versatile and powerful machines built for a variety of excavation, trenching, and material-handling applications. Designed with Kubota’s proven diesel engines, advanced hydraulics, and robust construction, these models provide the performance, reliability, and efficiency required by contractors and operators working in demanding environments.
The KX91-3S is a compact machine weighing about 3.2 tonnes, powered by a 28 hp engine and capable of digging depths up to 3.17 meters. The KX101-3 offers greater reach and performance, weighing approximately 3.59 tonnes and delivering 30 hp with a digging depth of around 3.3 meters. The KX121-3S steps up further with a 39 hp engine, an operating weight of about 4.1 tonnes, and a digging depth of nearly 4 meters. The largest in this group, the KX161-3S, weighs over 5.2 tonnes, powered by a 47 hp engine, with a digging depth of 4 meters and a reach of up to 6 meters. Across the range, transport widths vary between 1.55 meters and 1.96 meters, allowing excellent maneuverability while maintaining stability for heavy work.
The workshop repair manual provides detailed servicing instructions for all models, covering the engine, hydraulic system, cylinders, pumps, control valves, swivel joints, travel and swing motors, electrical system, and cab components. It includes detailed diagrams, wiring and hydraulic schematics, lubrication guides, torque specifications, and troubleshooting procedures, ensuring accurate diagnostics and professional maintenance for sustained machine performance.
Key Highlights
- KX91-3S: 3.2 t operating weight, 28 hp engine, 3.17 m digging depth
- KX101-3: 3.6 t operating weight, 30 hp engine, 3.3 m digging depth, 5.4 m reach
- KX121-3S: 4.1 t operating weight, 39 hp engine, 4 m digging depth
- KX161-3S: 5.2 t operating weight, 47 hp engine, 4 m digging depth, 6 m reach
- Transport widths: 1.55–1.96 m for stability and access to confined spaces
- Bucket breakout forces exceeding 9,000–11,000 lbs depending on model
- Workshop manual includes hydraulic and electrical schematics, torque values, and lubrication charts
- Coverage of engines, hydraulics, pumps, valves, travel/swing motors, and cab systems
- Designed for efficient servicing, reliability, and long-term durability
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