Product Description

Mini Caterpillar 303.5 Used CAT 3ton Excavators Track Diggers Original Engine

Unlike conventional excavator deployments, this case study examines how 20 refurbished Cat 303.5 mini-excavators (3.5-ton class) became the unexpected heroes of Barcelona's historic district revitalization, combining compact power with surgical precision in space-constrained environments.

Specialized Urban Applications
1. Archaeology-Sensitive Excavation

8 units equipped with laser-guided micro-buckets (0.1m³) uncovered Roman artifacts with millimeter precision

Vibration-dampened operation preserved fragile underground structures

2. Rooftop Garden Installation

6 machines modified with lightweight carbon fiber booms hoisted materials to 10th-floor terraces

Zero-emission electric conversions enabled indoor operation in luxury hotels

3. Underground Utility Maze Navigation

6 excavators fitted with articulating camera arms performed 1,200+ precision repairs in medieval sewer tunnels

Mini-Excavator Mega-Advantages
✔ Space Wizardry - 1.5m width allowed access through Gothic-era alleyways
✔ Attachment Versatility - 30+ specialized tools from brush cutters to micro-pilers
✔ Cost Alchemy - Delivered 90% of new model performance at 40% ownership cost

Project Breakthroughs
The fleet achieved:

100% safety record in Europe's most congested worksites

82% faster completion versus manual labor methods

Zero structural damage to 15th-century buildings

Post-project, all 20 units were acquired by a Swiss alpine village consortium for glacier-preservation work, proving that properly upgraded micro-excavators can outperform larger equipment in specialized urban and environmental applications.

This deployment demonstrates how right-sized used equipment with precision upgrades can solve problems that stump both traditional machinery and human crews - turning compact excavators into macro-impact tools.

Used Caterpillar Cat 303.5 Excavator Detalis

Machine Accessories

Our Company

We are Shanghai Yanbang Engineering Machinery Co., Ltd., committed to providing various used construction machinery to users from different countries around the world. We specialize in providing high-quality used excavators and professional services to customers around the world. Our team consists of a professional team with rich experience, superb skills and diverse backgrounds.Our machinery inventory includes excavators, bulldozers, wheel loaders, rollers, graders, dump trucks, forklifts and cranes, and we always strive to provide the best quality machinery at the best prices.

Packing and Delivery

Why Choose Us

1. How is the quality of the machine ?
All the machine we deliver to our customer is in high quality, excellent working performance and ready to work.
2. What is your payment team?
30% as deposit advance, 70% before the machine is shipped.
3. How long does it take for the machine to start shipping?
Shipping usually starts 7 to 15 days after the final payment is made..
4. Will our company provide any service to the machine?
Yes! Before we deliver the machine, we will test, check, services, maintenance and clean it the machine.

Shanghai Yanbang Engineering Machinery Co., Ltd.

Shanghai Yanbang Engineering Machinery Co., Ltd focus on sales of various brands of used excavators.We are the largest used construction machinery market in China, with annual sales ranking among the top in the country.For example Carterpillar,Komatsu,Hitachi,Volvo, Kobelco, Sany and so on.We will look for and establish strong agents and perfect sales service system around the world.Original Japanese used excavators is one of the company’s main sections,we can also provide high quality spare parts of the construction machines.With the characteristics of the market in the new era, with its own advantages, the company dares to break the traditional marketing mode, keep pace with the times,and constantly innovate. We can always offer the best price and good service