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Komatsu PC75UU-3 Excavator Overview
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Machine Profile and History
The Komatsu PC75UU-3 is a compact hydraulic excavator popular for its zero or minimal tail swing design, allowing effective operation in confined spaces. Often used in urban construction, landscaping, and utility applications, the machine strikes a balance between maneuverability, power, and versatility. It weighs approximately 7,400 kg (16,314 lbs) and is powered by a 4-cylinder Komatsu 4D95LE engine producing 68.4 horsepower, tailored for high efficiency and low emissions.
Technical Specifications
  • Operating Weight: 7,400 kg (16,314 lbs).
  • Engine: Komatsu 4D95LE, 4-cylinder, 3.3L displacement, 68.4 hp at 2300 rpm.
  • Fuel Capacity: Around 100 gallons (about 380 liters).
  • Hydraulic System: 18.5-gallon (70 L) fluid capacity with relief valve rated at 3,840 psi.
  • Pump Flow: Maximum hydraulic pump flow at 44.1 gallons per minute.
  • Track Width and Under Carriage: Shoe width at 17.7 inches, track gauge 5.4 feet.
  • Travel Speed: Up to 3.2 mph, allowing sufficient mobility on and off-site.
  • Swing Speed: 10.2 rpm, offering efficient rotation without excessive machine length requirement.
  • Bucket Capacities: Ranges from 0.18 to 0.35 cubic yards depending on application needs.
Performance and Features
The PC75UU-3 benefits from Komatsu’s advanced hydraulic technology, providing smooth and responsive boom, arm, and bucket actions. Its reduced tail swing radius of about 4.9 feet allows operators to work closer to obstacles without risking damage or compromising safety.
The excavator’s design focuses on operator comfort, featuring a spacious cab with low noise levels, ample visibility, and ergonomic controls, improving productivity during long shifts.
Applications
Common in urban construction, utility works, and landscaping projects, the PC75UU-3 excels in:
  • Digging and trenching in restricted areas.
  • Material handling and grading.
  • Utility installation and repair.
  • Demolition applications in confined settings.
Maintenance Highlights
Routine maintenance includes hydraulic fluid and filter checks, engine oil changes, track tension adjustment, and component inspections. Komatsu provides detailed service manuals and electronic diagnostics to support preventive maintenance.
Glossary of Terms
  • Zero Tail Swing: Design feature where the rear of the excavator does not extend beyond the track width during rotation.
  • Hydraulic Relief Valve: Safety valve releasing excess pressure to protect hydraulic components.
  • Pump Flow: The volume of hydraulic fluid moved per minute, influencing the speed of hydraulic functions.
  • Swing Speed: The rate at which the excavator’s upper structure rotates.
  • Track Gauge: The distance between the centers of the tracks, affecting stability and maneuverability.
Conclusion
The Komatsu PC75UU-3 is a compact, nimble, and powerful excavator designed to tackle demanding jobs in tight quarters with efficiency and operator comfort. Its advanced hydraulic system and thoughtful design make it a popular choice for urban construction and utility tasks requiring precision and agility. Supported by comprehensive maintenance resources, the PC75UU-3 remains a reliable tool in the compact excavator market.
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Komatsu PC75UU-3 Excavator Overview - by MikePhua - 08-27-2025, 04:00 AM

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