product detail
CAT Used Mini 3ton excavator
The Caterpillar 3-ton mini hydraulic excavator (model CAT® 303.5E CR) is a compact and versatile construction machine designed for light-duty operations. Key specifications include:
Engine: Powered by a Cat C1.8 diesel engine (23.6 kW/31.6 hp) with water-cooling and 1.8L displacement.
Performance: Offers 33 kN bucket digging force, 4.6 km/h travel speed, and 9 rpm swing speed, with an operating weight of 3,548 kg.
Hydraulics: Equipped with a 60 L/min main pump flow and 24.5 MPa travel hydraulic pressure.
Dimensions: Compact design with 4.73 m length, 1.78 m width, and 2.5 m height, ideal for confined spaces.
This model features a 0.12 m³ backhoe bucket and complies with standard safety and emission regulations. For full technical details, consult official CAT documentation.
Key Specifications
Key Features
Key Features for 3 Ton excavator
Compact Design
Operating weight of ~3,500–7,350 kg with 0.12–0.3 m³ bucket capacity, optimized for confined spaces like urban construction
Efficient Powertrain
Equipped with turbocharged diesel engines (e.g., Isuzu 4JG3X or Kubota V2607), delivering 36–55 kW power and low fuel consumption via high-pressure common rail technology.
Hydraulic Performance
Load-sensing hydraulic systems ensure precise control, with bucket/arm digging forces of 45–56 kN and 33–38 kN respectively.
Operator Comfort
Ergonomic ROPS/FOPS-certified cabins with 7-inch touchscreens, enhanced visibility, and noise reduction.
Versatility
Supports multi-purpose attachments (e.g., breakers, augers) for tasks like digging, lifting, and trenching
Optional Configurations
Cat 3-ton excavator optional configurations
Advanced Hydraulic System
Features load-sensing hydraulics with 60 L/min pump flow and 24.5 MPa pressure for precise bucket/arm control. Compatible with multi-attachments (breakers, augers)
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Ergonomic ROPS/FOPS Cabin
Includes a 7-inch touchscreen, noise reduction (<70 dB), and adjustable air suspension seats for operator comfort during long shifts
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Fuel-Efficient C1.8 Engine
Turbocharged 1.8L diesel engine (18.4 kW/24.6 hp) with auto-idle and MAR-1/China Non-Road Stage III emission compliance, reducing fuel consumption by 15% vs. older models
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Smart Grade Control (2D/3D)
Factory-installed 2D/3D grade guidance for real-time depth/slope adjustment via joystick or touchscreen, minimizing rework. Optional 3D upgrade available .
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FAQ
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FAQ
FAQ 1: What is the fuel efficiency of the CAT 3-ton excavator?
The CAT 303.5E CR achieves 15% lower fuel consumption compared to older models, thanks to its C1.8 turbocharged engine (23.6 kW/31.6 hp) with auto-idle and load-sensing hydraulics (60 L/min flow). It complies with China Non-Road Stage III emissions.
FAQ 2: What attachments are compatible with this model?
It supports multi-purpose attachments like breakers, augers, and grading buckets. The hydraulic system delivers 35 MPa pressure (lift mode: 38 MPa) for precise control.
FAQ 3: How often should maintenance be performed?
Daily: Check hydraulic oil/coolant levels and track tension (20–30 mm sag).
Scheduled: Replace engine oil every 500 hours (post-break-in) and hydraulic filters every 3,000 hours.
For full specs, consult CAT dealer documentation.
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