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CONTACT USUsed Excavator CAT 312D2GC Gallery, Images, Pictures
Used Excavator CAT 312D2GC Main Parts Pictures
The CAT 312D2GC is a versatile, fuel-efficient mid-size hydraulic excavator designed for a wide range of tasks, including digging, lifting, grading, and trenching. Here are the main parts of the CAT 312D2GC:
1. Engine
- Engine Type: C4.4 ACERT™ Diesel Engine
- Function: Powers the excavator and drives the hydraulic system.
- Horsepower: Approximately 106 hp (79 kW).
- Key Components:
- Fuel Injection System: Ensures efficient combustion for optimal performance and reduced emissions.
- Turbocharger: Enhances engine performance by increasing the intake air.
2. Hydraulic System
- Hydraulic Pump: High-performance pump delivering power to various parts of the machine (boom, arm, bucket, swing, and travel).
- Hydraulic Cylinders: Actuators for controlling the boom, arm, and bucket movements.
- Hydraulic Oil Reservoir: Stores the hydraulic fluid that powers the system.
- Control Valves: Distribute hydraulic power to the correct parts based on operator input.
3. Boom
- Function: The long, rigid structure connected to the upper frame. It extends outward to support the arm and bucket, allowing for digging or lifting.
- Hydraulic Cylinder: Controls the boom's raising and lowering.
4. Arm (or Stick)
- Function: The arm extends from the boom and connects to the bucket, allowing it to dig and scoop materials.
- Hydraulic Cylinder: Controls the extension and retraction of the arm.
5. Bucket
- Function: The primary attachment used for digging, loading, and lifting materials like soil, gravel, and debris.
- Bucket Types: Varies in size and shape based on the work being done (e.g., digging bucket, heavy-duty bucket).
6. Undercarriage
- Tracks: Provide stability and allow for mobility, typically made of steel or rubber.
- Track Rollers: Support the tracks and reduce wear.
- Sprockets: Drive the tracks, ensuring movement and directional control.
- Idlers: Help maintain track tension and prevent slipping.
7. Cab and Operator Controls
- Cab: Enclosed space where the operator sits. It is equipped with heating, air conditioning, and visibility features for comfort and safety.
- Controls: Joysticks, pedals, and other controls allow the operator to maneuver the machine and its attachments.
- Display Screen: Shows performance data, fuel usage, maintenance alerts, and other important information.
8. Travel Mechanism
- Drive Motors: Motorized units that power the tracks, enabling forward, backward, and turning movements.
- Travel Speed: Capable of moving at different speeds depending on the application.
9. Counterweight
- Function: Located at the rear of the machine, the counterweight balances the excavator, especially when the arm and bucket are fully extended.
- Weight: Provides stability when lifting or digging heavy loads.
10. Swing Mechanism
- Swing Motor: Powers the rotation of the upper structure (cab, boom, arm, etc.) around the undercarriage.
- Swing Bearings: Support the upper structure, allowing smooth rotation.
11. Cooling System
- Radiator: Cools the engine, hydraulic system, and other components to prevent overheating.
- Coolant Reservoir: Stores the coolant fluid.
- Coolant Hoses and Pumps: Circulate coolant throughout the system.
12. Electrical System
- Battery: Provides power to start the engine and operates electrical components.
- Alternator: Charges the battery and powers electrical systems when the engine is running.
- Fuses and Circuit Breakers: Protect electrical components from damage due to overloads.
13. Fuel System
- Fuel Tank: Stores diesel fuel to power the engine.
- Fuel Filter: Removes impurities from the fuel before it reaches the engine.
- Fuel Pump: Transfers fuel from the tank to the engine.
14. Air Conditioning and HVAC System
- Cab HVAC System: Provides climate control for the operator, ensuring comfort in all weather conditions.
- Air Filter: Ensures clean air circulation within the cab.
15. Exhaust System
- Muffler: Reduces noise from the engine exhaust.
- Emission Control: Includes systems like diesel particulate filters (DPF) or selective catalytic reduction (SCR) to meet environmental standards.
16. Service and Maintenance Components
- Grease Points: Locations for lubrication to reduce wear and tear.
- Oil Filter: Filters engine oil to ensure proper lubrication and prevent debris from entering the engine.
- Maintenance Access Panels: For easy access to key components, making maintenance simpler and more efficient.
Here are the main parts of the CAT 312D2GC Excavator, which work together to deliver optimal performance and efficiency:
1. Engine
- Function: Powers the machine and drives all the mechanical and hydraulic systems.
- Details: The CAT 312D2GC is equipped with a 4-cylinder diesel engine that typically delivers around 55.4 kW (74.3 hp). The engine provides the necessary power for excavation and digging tasks.
- Key Components:
- Air filter system
- Fuel filter system
- Cooling system
- Exhaust system
2. Hydraulic System
- Function: Controls all the digging, lifting, and swing movements of the excavator.
- Details: The hydraulic system provides the necessary force to operate the boom, arm, bucket, and other attachments.
- Key Components:
- Hydraulic pump: Powers the system and controls fluid flow.
- Hydraulic cylinders: Provide force for arm, bucket, and boom movements.
- Hydraulic reservoir: Stores hydraulic fluid.
- Valves: Direct fluid flow to various components.
3. Undercarriage
- Function: Provides stability, mobility, and support to the excavator.
- Details: The undercarriage ensures the excavator can move efficiently on various surfaces and terrains.
- Key Components:
- Tracks: Steel tracks provide good traction and durability.
- Track rollers: Support and help guide the tracks.
- Idlers and sprockets: Help with track alignment and movement.
- Track frame: Supports and holds the track components.
4. Boom, Arm, and Bucket
- Function: These components are responsible for digging, lifting, and material handling.
- Details: The boom provides height, the arm offers reach, and the bucket is used for scooping and digging.
- Key Components:
- Boom: The long arm extending from the base of the machine.
- Arm: The jointed part that gives the excavator the ability to extend further.
- Bucket: The digging attachment, typically equipped with replaceable teeth.
- Linkage system: Transfers motion from the boom and arm to the bucket.
5. Swing Mechanism
- Function: Allows the upper structure of the excavator to rotate 360°.
- Details: The swing mechanism provides the excavator with the ability to rotate the upper part of the machine while keeping the undercarriage stationary.
- Key Components:
- Swing motor: Drives the rotation.
- Swing bearing: Supports the rotation of the upper part of the excavator.
- Swing gear: Transfers motion from the swing motor to the bearing.
6. Cab and Operator Controls
- Function: Provides the operator with the workspace and controls to manage the machine's functions.
- Details: The cab is designed for operator comfort and visibility while performing various tasks.
- Key Components:
- Seat: Adjustable for operator comfort.
- Controls: Includes joysticks, pedals, and switches for controlling movement and operation.
- Display screen: Shows machine diagnostics, fuel levels, and operational parameters.
- Climate control: Offers heating and cooling for the operator's comfort.
- Windows and mirrors: Provide excellent visibility for safe operation.
7. Cooling System
- Function: Prevents overheating of critical components like the engine and hydraulic system.
- Details: Ensures the engine and hydraulic fluid stay at optimal operating temperatures.
- Key Components:
- Radiator: Cools the engine coolant.
- Oil cooler: Cools hydraulic fluid.
- Cooling fan: Draws air through the radiator and oil cooler.
8. Fuel System
- Function: Stores and supplies fuel to the engine.
- Details: Ensures the engine has a constant supply of fuel for operation.
- Key Components:
- Fuel tank: Stores the fuel.
- Fuel pump: Transfers fuel from the tank to the engine.
- Fuel filters: Prevent contaminants from entering the engine.
9. Electrical System
- Function: Powers the electrical components and provides diagnostics for the excavator.
- Details: The electrical system is crucial for starting the engine, operating lights, sensors, and controlling various subsystems.
- Key Components:
- Battery: Powers electrical components and starts the engine.
- Alternator: Charges the battery.
- Wiring and fuses: Distribute electrical power to the various components.
10. Final Drive
- Function: Transmits power from the engine to the tracks.
- Details: Converts the engine's rotational power into movement to drive the tracks.
- Key Components:
- Final drive motor: Powers the tracks.
- Gearbox: Reduces speed and increases torque to drive the tracks.
11. Control System
- Function: Monitors and manages the performance of the excavator.
- Details: The control system adjusts various operational parameters to ensure efficiency and safety.
- Key Components:
- ECU (Electronic Control Unit): The brain of the machine, managing data from sensors and controlling functions.
- Sensors: Monitor things like engine temperature, hydraulic pressure, and fuel levels.
Shanghai Sunight Machinery Co., Ltd.
+86-021-68069923
No.6965, Linhai Road, Fengxian District, Shanghai, China
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