Caterpillar 320BL クローラーショベル

The CAT 320BL is a classic 20-ton-class (mid-size) hydraulic excavator from Caterpillar's B-Series lineup, renowned globally for its rugged durability, strong digging power, and reliable performance. It was a flagship model in the late 1990s and early 2000s, and remains highly sought-after in the used equipment market for general construction, earthmoving, and quarrying applications.
Core Features & Design
Robust Powertrain
The 3066T diesel engine is legendary for its reliability and strong low-end torque, ideal for heavy digging and loading.
Mechanical fuel injection system for simplicity, easy maintenance, and tolerance to lower-quality fuels.
Advanced Hydraulics (Cross-Sensing System)
A high-performance hydraulic system that delivers 100% engine power to the hydraulics for maximum efficiency.
Boom regeneration circuit speeds up boom lowering, reducing cycle times and saving fuel.
Provides smooth, precise control for both heavy-duty work and fine grading.
Long Undercarriage (L-spec)
The 'L' stands for Long Undercarriage, offering superior stability, especially when lifting heavy loads or working on slopes.
Heavy-duty steel tracks, reinforced frame, and extended track length for excellent lift capacity and balance.
Durable Structure
Thick, high-strength steel booms and sticks designed for extreme stress and impact resistance.
Reinforced idlers, rollers, and track chains for long service life in harsh conditions.
Operator Station
Spacious, ROPS/FOPS-certified cab for safety.
Ergonomic pilot controls, adjustable suspension seat, and excellent visibility to reduce fatigue.
Easy-to-read instrument panel for monitoring all machine functions.
Easy Maintenance
Wide engine hood and service doors for ground-level access.
Extended service intervals on filters and fluids to reduce downtime.
Centralized grease points for quick daily maintenance.
Typical Applications
General earthmoving & excavation
Road construction & maintenance
Foundation digging & trenching
Material loading & handling
Quarrying & small-scale mining
Demolition (with appropriate attachments)
The 320BL is a workhorse that defined Caterpillar's reputation in the 20-ton class. Its combination of power, reliability, and ease of repair makes it a staple on job sites worldwide, even decades after production.