Overview

The Cat 300.9D Versatile Power System (VPS) with HPU300 is a compact mini excavator designed for versatility and efficiency in confined spaces. This innovative machine offers dual power options—diesel and electric—allowing for zero-emission operation in sensitive environments. Its compact size enables access through narrow doorways, making it ideal for indoor demolition and urban construction projects.

Technical Specifications

• Engine Model: Yanmar 3TNV70​
• Net Power: 13 hp (9.7 kW)​
• Operating Weight: 2,399 lb (1,088 kg)​
• Maximum Digging Depth: 68 inches (1,731 mm)​
• Fuel Tank Capacity: 2.6 gallons (10 liters)​
• Hydraulic System Pressure: 2,466 psi (170 bar)​
• Travel Speed: 1.1 mph (1.8 km/h)

Advantages

✅ Dual Power Options: The ability to switch between diesel and electric power provides flexibility for various job sites, especially where emissions and noise are concerns. ​

✅ Compact Design: Its narrow width allows access through standard doorways, making it suitable for indoor and confined space operations. 

​✅ Low Noise Levels: Electric operation ensures quieter performance, beneficial for noise-sensitive areas. 

✅ Ease of Transportation: Lightweight design facilitates easy transport between job sites.

Disadvantages

🔴 Limited Power: With a 13 hp engine, it may not be suitable for heavy-duty excavation tasks.​

🔴 Shallow Digging Depth: A maximum digging depth of 68 inches may limit its use in deeper excavation projects.​

🔴 Open Operator Station: Lacks an enclosed cab, offering less protection in adverse weather conditions.

Best Use Cases

• Interior Demolition: Small enough to fit through doorways, making it perfect for removing flooring and breaking concrete indoors.
• Urban Construction: Ideal for narrow alleys, sidewalks, and areas where space is extremely limited.
• Landscaping: Great for small excavation projects like digging garden beds or installing irrigation systems.
• Utility Work: Useful for light trenching and underground pipe installations in tight spaces.

Price & Competitors

Price: Starts at $30,000 – $35,000 USD, depending on configuration and attachments.

Top Competitors:

• Bobcat E10e – Offers similar size and performance but features a fully electric option for zero-emissions work.
• Kubota K008-3 – Slightly more powerful (10.3 hp) and known for smooth hydraulic controls.
• Takeuchi TB210R – Offers better stability with a more robust undercarriage design.

Final Thoughts

The Cat 300.9D Mini Excavator is one of the smallest excavators on the market, making it a top choice for indoor work, tight spaces, and light excavation tasks. While it lacks power and advanced features, its compact size, low fuel consumption, and ease of transport make it a solid option for small contractors and landscapers. If you need a powerful but ultra-compact machine, the 300.9D is worth considering.