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Caterpillar 301.5CR Mini Excavator Overview
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Machine Overview and Application
The Caterpillar 301.5CR is a compact and versatile mini excavator designed for tight spaces and efficient digging in a range of applications such as residential construction, landscaping, and utility work. This model focuses on providing power and maneuverability while maintaining a small footprint.
Key Specifications
  • Engine: Cat C1.1, delivering approximately 21 horsepower (15.7 kW) at 2400 rpm, compliant with EPA Tier 4 Final and EU Stage V emissions.
  • Operating Weight: Approximately 3,900 lbs (1,775 kg) with canopy.
  • Dig Depth: Standard stick allows digging depth around 100 in (2540 mm).
  • Hydraulic System: Load sensing hydraulics with a variable displacement piston pump offering 17.4 gallons per minute flow at 213 bar (3,089 psi).
  • Travel Speed: Up to 2.7 mph (4.4 km/h) high speed.
  • Ground Pressure: Ranges from 4.0 psi to 4.4 psi depending on weight configuration.
  • Gradeability: Maximum 30 degrees.
  • Swing Radius: Reduced tail swing radius of 32.3 in (820 mm) for enhanced maneuverability.
Features and Operator Comfort
The 301.5CR features an adjustable wrist rest, suspension seat options, and an intuitive LCD monitor that provides easy-to-read machine information. Operators benefit from stick steer travel mode, allowing control via joysticks, reducing fatigue and improving handling in job site navigation.
Safety and Durability
The machine complies with safety standards including ROPS, TOPS, and Level II Top Guard certifications, offering operator protection in rollover or tip-over scenarios. Robust build quality and hydraulic system reliability enhance durability.
Maintenance and Service
Routine maintenance includes checking hydraulic fluid levels, engine oil, and track condition. The hydraulic tank holds about 4.8 gallons (18 liters), and hydraulic system capacity is approximately 6.9 gallons (26 liters). Regular inspections and prompt servicing prolong equipment life.
Glossary of Terms
  • Load Sensing Hydraulics: A hydraulic system that adjusts pump output based on demand, improving fuel efficiency.
  • Stick Length: The length of the excavator arm section affecting dig depth and reach.
  • Travel Speed: The maximum speed the machine can move during operation.
  • Gradeability: The steepest slope the machine can climb safely.
  • Swing Radius: The horizontal distance the excavator’s upper structure extends beyond its tracks during rotation.
Conclusion
The Caterpillar 301.5CR mini excavator combines power, compactness, and advanced hydraulics engineered for efficient work in constrained environments. Its operator-centric design supports extended use with reduced fatigue, while safety and durability features protect operators and the machine. Adhering to recommended maintenance schedules and understanding key specifications ensures sustained high performance for diverse tasks.
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