Used Excavator Komatsu PC70 Gallery, Images, Pictures

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Used Excavator Komatsu PC70 Main Parts Pictures

The Komatsu PC70 is a small to medium-sized hydraulic excavator, known for its versatility and ability to work in tight spaces. It is used primarily in construction, urban development, landscaping, and material handling. Below is a detailed breakdown of the main parts of the Komatsu PC70:

1. Engine

• Type: Diesel engine (typically Komatsu S4D95 or similar).
• Power Output: Approximately 70–75 horsepower.
• Function: Provides power to the hydraulic system and travel motors.
• Cooling System: Includes a radiator, fan, and coolant system to prevent engine overheating.
• Fuel System: Includes the fuel tank, fuel pump, fuel filter, and fuel lines that ensure clean fuel delivery to the engine.
• Air Filter: Prevents dust and other contaminants from entering the engine.
• Exhaust System: Includes an exhaust manifold, muffler, and optional aftertreatment system (like a Diesel Particulate Filter, DPF, or Selective Catalytic Reduction, SCR).

2. Hydraulic System

• Main Hydraulic Pump: Powers the boom, arm (stick), bucket, and other hydraulic attachments.
• Hydraulic Cylinders: Control the movement of the boom, arm, and bucket. Typically, there are three cylinders: for boom lifting, arm (stick) extension, and bucket operation.
• Hydraulic Reservoir: Stores hydraulic fluid and ensures a constant supply to the hydraulic system.
• Control Valves: Direct the hydraulic fluid to the appropriate components to carry out movements (digging, lifting, etc.).
• Hydraulic Hoses and Pipes: Carry pressurized hydraulic fluid throughout the system to the cylinders and valves.
• Auxiliary Hydraulic Lines (Optional): For powering additional attachments, such as breakers, hammers, or augers.

3. Undercarriage

• Tracks: The Komatsu PC70 uses rubber or steel tracks, which provide better stability and mobility on rough or uneven terrain.
• Track Rollers: Support the tracks, allowing them to rotate smoothly over the ground.
• Idlers: Positioned at the front of the track frame, the idlers help guide the tracks and maintain proper tension.
• Track Tensioner: Allows for adjustment of the track tension to ensure smooth movement and to reduce wear.
• Final Drive: Transmits power from the engine to the tracks, allowing the machine to move forward or backward.

4. Boom and Arm (Stick)

• Boom: A long arm that extends vertically and horizontally to lift, move, and position materials. It provides the reach necessary for digging or lifting at a distance.
• Arm (Stick): The extendable part of the boom, which provides further reach and depth when digging or excavating.
• Pins and Bushings: Connect the boom, arm, and bucket. These allow for smooth articulation during operation.
• Boom and Arm Hydraulic Cylinders: Control the lifting and extension of the boom and arm, enabling the operator to reach and manipulate materials at various angles and depths.

5. Bucket

• Bucket Types: The PC70 can be fitted with different types of buckets, such as general-purpose, heavy-duty, or rock buckets, depending on the application.
• Bucket Teeth: Replaceable teeth that provide better penetration into the material, aiding in digging.
• Quick Coupler (Optional): Allows the operator to easily change the bucket or other attachments, such as breakers or grabs.
• Bucket Pin: Secures the bucket to the arm or stick, and allows for smooth operation.

6. Operator’s Cabin

• Seat: The seat is ergonomically designed for comfort during long hours of operation. It can be adjusted to fit the operator’s needs and preferences.
• Control Console: Contains the joystick and lever controls for operating the boom, arm, bucket, and auxiliary hydraulics.
• Instrument Panel: Displays critical information such as engine speed, hydraulic pressure, fuel levels, and any system alerts.
• Visibility: The cabin is designed for excellent visibility in all directions, particularly the area around the digging and lifting operations.
• Climate Control: Air conditioning and heating options (in some models) to keep the operator comfortable in varying weather conditions.
• ROPS/FOPS (Rollover/Falling Object Protective Structure): Provides safety for the operator in the event of a rollover or falling debris.

7. Swing System

• Swing Motor: Powers the rotation of the upper structure (cab, boom, and arm) to allow the excavator to rotate 360 degrees.
• Swing Gearbox: Transfers the rotation force from the swing motor to the upper structure.
• Swing Ring: A large bearing that enables smooth rotation of the upper structure.
• Swing Lock: Holds the upper structure stationary when not in use to prevent unintended rotation.

8. Electrical System

• Battery: Powers the electrical systems, such as the ignition, lights, and instrumentation.
• Alternator: Charges the battery during operation and powers electrical components.
• Wiring Harness: Connects electrical components and allows for communication between sensors, controllers, and actuators.
• Lighting System: Includes work lights, headlights, tail lights, and turn signals to ensure safe operation in low-light conditions.

9. Fuel System

• Fuel Tank: Stores diesel fuel for the engine.
• Fuel Filters: Clean the fuel before it reaches the engine to prevent clogging and damage.
• Fuel Lines: Deliver fuel from the tank to the engine.

10. Travel System

• Travel Motors: Drive the travel motors to propel the excavator on its tracks.
• Final Drives: Transmit power from the travel motor to the tracks, enabling the excavator to move forward or backward.
• Brakes: The PC70 features multi-disc brakes for smooth and controlled stopping. It includes both service brakes for operation and parking brakes to hold the machine stationary.
• Track Frames: Support the tracks, providing the excavator with its stability and load-bearing capacity.

11. Cooling System

• Radiator: Cools the engine and hydraulic oil to prevent overheating.
• Oil Cooler: Specifically cools the hydraulic oil used in the system, maintaining its ideal temperature.
• Coolant Fan: Moves air through the radiator and oil coolers to maintain optimal operating temperatures.

12. Exhaust System

• Exhaust Pipe: Directs exhaust gases away from the engine.
• Muffler: Reduces the noise generated by the engine’s exhaust.
• Aftertreatment System (Optional): Some models may include a Diesel Particulate Filter (DPF) or Selective Catalytic Reduction (SCR) to meet emissions standards.

13. Brake System

• Service Brakes: Multi-disc brakes used to stop the excavator during regular operation.
• Parking Brake: Holds the machine stationary when parked.

14. Safety Features

• Emergency Stop Button: Allows the operator to quickly stop the machine in case of an emergency.
• Backup Alarm: Sounds when the excavator is reversing, alerting surrounding personnel.
• Seatbelt: Ensures the operator is securely fastened during operation.
• Overhead Guard (ROPS/FOPS): Protects the operator from falling objects or in case of a rollover.
• Swing Lock: Prevents unintended swinging of the upper structure when stationary.