Used Excavator Komatsu PC400-7 Gallery, Images, Pictures

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Used Excavator Komatsu PC400-7 Main Parts Pictures

The Komatsu PC400-7 is a hydraulic crawler excavator designed for heavy-duty work in construction, mining, and other large-scale operations. Its robust design, powerful engine, and advanced hydraulic system make it a versatile machine capable of handling a variety of tough tasks. Below are the main parts and components of the Komatsu PC400-7 excavator:

1. Engine

• Engine Type: The Komatsu PC400-7 is powered by the Komatsu SAA6D125E-3, a turbocharged 6-cylinder diesel engine.
• Rated Power: Approximately 261 kW (350 hp) at 1,800 rpm.
• Turbocharger: The engine is equipped with a turbocharger for enhanced efficiency and power, especially under load and high-altitude conditions.
• Cooling System: Includes a radiator, oil cooler, and intercooler to maintain optimal engine temperatures during extended operation.
• Fuel System: The engine uses common rail fuel injection for improved fuel efficiency and reduced emissions.

2. Hydraulic System

• The hydraulic system is one of the core components of the PC400-7, providing the power for the boom, arm, bucket, and swing functions.
• Main Hydraulic Pump: The excavator is equipped with a variable displacement piston pump that provides high-flow and high-pressure hydraulic power, enabling it to perform demanding tasks.
• Hydraulic Cylinders: Control the movement of the boom, arm, and bucket. These cylinders provide the force needed for digging, lifting, and handling material.
• Hydraulic Control Valve: Directs hydraulic fluid to various cylinders, allowing for smooth operation of the machine's components.
• Pilot Control System: A pilot control system ensures that the machine responds precisely to the operator's commands with minimal effort.
• Hydraulic Oil Cooler: Maintains the hydraulic fluid at an optimal temperature to prevent overheating during long shifts.

3. Undercarriage

• Track Frame: Provides the base for the machine’s stability and weight distribution. It ensures the excavator operates efficiently on uneven and rough terrain.
• Tracks: The PC400-7 uses steel tracks for durability and superior traction on soft ground, mud, and rocky surfaces.
• Track Rollers: Rollers help distribute the machine's weight evenly across the tracks and reduce friction for smoother movement.
• Idlers: Located at the front of the undercarriage, idlers maintain tension in the tracks and help guide them during operation.
• Sprockets: The sprockets engage the tracks to drive the machine forward and backward.
• Track Shoes: The pads that provide contact with the ground and help maintain traction.

4. Upper Structure

• Cab: The operator’s cab is spacious and designed for comfort and safety, featuring ergonomic controls, air conditioning, and noise-reducing features.
• Swing Bearing: The swing bearing enables the upper structure (including the cab, boom, arm, and counterweight) to rotate 360 degrees, providing flexibility in operation.
• Counterweight: Positioned at the rear, the counterweight helps balance the excavator, preventing tipping during heavy lifting and digging tasks.
• Engine Hood: Protects the engine and cooling system while providing easy access for maintenance.

5. Boom, Arm (Stick), and Bucket

• Boom: The boom is a long, strong arm that provides vertical reach for digging, lifting, and other tasks.
• Arm (Stick): The arm or stick connects the boom to the bucket and allows the excavator to extend its reach for deeper digging and more versatile material handling.
• Bucket: The bucket is the main attachment used for digging and material handling. Various bucket types (general-purpose, heavy-duty, narrow, etc.) are available for different tasks.
• Quick Coupler: A quick coupler system allows for easy and fast attachment changes, improving productivity and versatility.

6. Attachment System

• The Komatsu PC400-7 can be fitted with various attachments for specialized tasks. Common attachments include:
  • Buckets (general-purpose, heavy-duty, trenching)
  • Hydraulic Hammers
  • Grapples
  • Augers
  • Rippers
• The quick coupler system enables fast switching between attachments, reducing downtime and improving job-site efficiency.

7. Cooling System

• Radiator: Cools the engine coolant to ensure the engine maintains an optimal temperature under load.
• Oil Cooler: Cools hydraulic oil, preventing the hydraulic system from overheating.
• Coolant Reservoir: Stores coolant for the engine cooling system, ensuring continuous performance during long operating hours.

8. Electrical System

• Alternator: Supplies electrical power to charge the battery and run the machine’s electrical components.
• Battery: Stores power for starting the engine and operating the electrical system.
• Fuse Box and Wiring Harness: Distributes electrical power to various parts of the machine and serves as a central point for troubleshooting.
• Machine Monitoring System: Displays real-time data on the machine’s performance, including engine status, fuel consumption, and maintenance alerts.

9. Transmission and Drive System

• Hydrostatic Drive: The PC400-7 uses a hydrostatic drive system for smooth, efficient control over travel speed and direction.
• Final Drive Motors: Provide the necessary power to move the tracks forward or backward.
• Planetary Gear System: Helps reduce the speed of the travel motors while increasing torque, allowing the machine to operate more efficiently in heavy-duty applications.
• Travel Speed Control: Allows the operator to control the machine’s speed, optimizing performance in various ground conditions.

10. Swing System

• Swing Motor: Powers the rotation of the upper structure, enabling the cab, boom, and arm to rotate 360 degrees.
• Swing Reducer: Slows down the swing motor while increasing torque, allowing for controlled rotation of the upper structure.
• Swing Ring: A bearing system that allows continuous 360-degree rotation of the upper structure.

11. Fuel System

• Fuel Tank: Stores the diesel fuel required for engine operation.
• Fuel Filters: Filters out contaminants from the diesel before it enters the engine, ensuring long engine life.
• Fuel Filler Neck: The point at which fuel is added to the tank, typically located on the side of the machine.