Komatsu PC200LC-6 Hydraulic Excavator Detailed Overview

[MikePhua]

Introduction and Company Background
Komatsu Ltd., founded in 1921, is the world’s second-largest manufacturer of construction equipment, known for a diverse product line including excavators, dozers, wheel loaders, and mining machinery. The Komatsu PC200LC-6 is a notable medium-sized hydraulic excavator recognized for its productivity, durability, and advanced hydraulic technology.
Technical Specifications

• Engine: Komatsu SAA6D102E-1, six-cylinder diesel engine
  
• Engine Power: 99 kW (133 hp) at 2000 rpm
  
• Operating Weight: 21,030 to 22,423 kg (46,363 to 49,434 lbs)
  
• Bucket Capacity: 0.42 to 1.22 m³ (0.55 to 1.59 yd³)
  
• Boom Length: Approximately 5700 mm (18 ft 8 in)
  
• Arm Length: Options ranging from 1840 mm to 4055 mm (6 ft to 13 ft 4 in)
  
• Hydraulic System: HydrauMind closed-center system with load-sensing and pressure-compensated valves
  
• Main Pumps: Two variable-displacement piston pumps with a combined flow rate of up to 412 liters/min (108.8 gpm)
  
• Travel Motors: Dual axial piston motors with parking brakes
  
• Swing Motor: Single axial piston motor with swing holding brake
  
• Relief Valve Settings: Implement up to 5190 psi, travel around 5050 psi, swing at 3980 psi
  

Features and Innovations

• Advanced Hydraulic Control: The HydrauMind system optimizes power and efficiency by adjusting pump output to demand, supporting smooth and precise operation of boom, arm, bucket, swing, and travel functions.
  
• Operator Comfort: The cab features viscous mounts to reduce noise and vibration, a spacious interior, and an easy-to-read diagnostic monitor that tracks machine health and performance. The cab includes an effective air conditioning system and an automotive-style three-inch retractable seatbelt for safety.
  
• Durability: Critical boom and arm parts are made of cast steel with one-piece top and bottom plates for increased strength. Large sealed undercarriage components enhance service life in harsh environments.
  
• Multiple Working Modes: Includes five selectable modes to tailor engine speed, pump flow, and system pressure for different applications such as breaker use or general excavation.
  

Operational and Maintenance Highlights

• Operators benefit from multi-position controls and adjustable seats that improve ergonomic comfort and productivity.
  
• The hydraulic system’s extensive filtration protects pumps and valves, minimizing downtime and maintenance costs.
  
• Self-diagnostic capabilities cover over 119 parameters, facilitating quick troubleshooting and maintenance actions.
  

Applications and Utility
The PC200LC-6 suits jobs ranging from urban construction to heavy mining and forestry, thanks to its adaptable attachments and robust hydraulic power. Typical tasks include trenching, material handling, demolition, and site preparation.
Terminology Explained

• Variable-Displacement Pump: A pump that adjusts output flow to match demand, reducing fuel consumption.
  
• Load-Sensing System: Hydraulic technology that adjusts pump output pressure and flow rates based on load requirements.
  
• Axial Piston Motor: A type of hydraulic motor offering high efficiency and smooth torque control.
  
• Implement Relief Valve: Safety valve limiting hydraulic pressure to prevent system overload.
  
• Diagnostic Monitor: Computerized system showing operational data and alerting to faults.
  

Case Insight
A mining contractor using the PC200LC-6 reported high uptime rates due to its advanced hydraulic efficiency, which reduced fuel consumption by up to 15%. The operator highlighted the cab comfort as a major contributor to maintaining long shifts with less fatigue.
Conclusion
Komatsu PC200LC-6 marks a significant advance in medium hydraulic excavators, blending powerful engine technology with state-of-the-art hydraulics and operator-centric design. Its strong specifications and application versatility make it a reliable choice for a wide range of heavy equipment users seeking efficiency, durability, and ease of maintenance.