We mainly discuss the hydraulic excavator
1 Excavator Main Structure Diagram
The main working parts of excavators generally include standard buckets, reinforced buckets, rock buckets, etc.
1.2 Bucket Link
Connect the bucket and cylinder to increase the range of activities of the bucket.
1.3 Bucket Cylinder
The bucket hydraulic cylinder mainly controls the movement of the bucket.
1.4 Arm (dipper arm) and 1.6 boom
The main function of the arm and boom is to control the digging, loading, and other actions of the bucket. The boom is mounted on the track frame.
1.5 Arm Cylinder
The arm cylinder mainly controls the movement of the arm.
1.7 Boom Cylinder
The boom cylinder mainly controls the movement of the boom, boom cylinder generally needs to configure two excavators per excavator.
The seat is for the driver, which is convenient for the driver to operate the excavator
1.9 Cabin Assy
The driver's workplace, protects the driver, isolates noise, and maintains a comfortable temperature. Its structure is directly related to the safety, work efficiency, and health of the driver. The cab generally adopts a thin metal shell structure and is flexibly connected to the frame.
1.10 Side Door
The side door is designed to facilitate the observation and maintenance of the internal components of the excavator. it generally includs the pump door, engine door, etc.
1.11 Counter Weight (heavy duty)
The counterweight is to balance the movement of the excavator's boom, arm, and bucket.
2 Excavator Undercarriage Diagram
2.1 Track Roller
The track rollers of the excavator are mainly connected to the excavator frame and the track link. It supports the weight of the excavator. Usually, an excavator has several track rollers.
2.2 Tensioner Assembly
The tensioning assembly of the excavator is mainly to make a certain pre-tightening force. This force is between the track link and the front idler, Preventing the track from falling off the excavator. This force is achieved by springs on the tensioner assembly.
2.3 Carrier Roller
The carrier roller is used to support the upper part of the track link. preventing the track link from sagging too much and affecting the movement of the excavator.
2.4 Front Idler
The function of the front idler is to guide the track link.
2.5 Track link Assy
The function of the track link assy is to connect the track shoes and receive the power transmitted by the sprocket.
2.6 Link Protection
The function of link Protection is to prevent the track link from falling off
2.7 Track Shoe Assy
The function of this part is to provide support for the excavator and increase the contact area with the ground
2.8 Track Shoe
This part is the basic unit that makes up track shoe assy
Sprocket is the drive part, connecting the travel motor and the track link, and driving the track link to move
3 Excavator Hydraulic Parts Diagram
3.1 Hydraulic Cylinder
A hydraulic cylinder is an actuator in the hydraulic system. Which converts hydraulic energy into the alternating motion of the hydraulic piston. it drives the alternating motion of the boom, arm, and bucket.
3.2 Swing Motor Assy
The swing motor assy (hydraulic motors) is an actuator in the hydraulic system, which converts hydraulic energy into alternating rotational motion. Through the cooperation of the swing Bearing ( slew ring ) , it drives the upper part of the excavator to do alternating swing motion.
3.3 Main Control Valve
The main control valve is a control component in the hydraulic system. Which reasonably distributes the hydraulic fluid to the various actuators. so that the actuators cooperate with each other to complete the predetermined excavation action.
3.4 Hydraulic Pump
The hydraulic pump is a power components in the hydraulic system. which converts the mechanical energy of the excavator engine into hydraulic energy. Excavators generally use a piston hydraulic pump.
We can supply replacement parts for your excavator.
3.5 Travel Motor Assy
The travel motor assy (hydraulic motors) is the actuator in the hydraulic system. which converts hydraulic energy into mechanical energy, The form of motion is rotary motion. The travel motor drives the track link assy so that the excavator has the ability to travel. It's moving parts.
3.6 Foot Pilot Valve
Foot pilot valve belong to the control components in the hydraulic system. Through the manual control of the Foot Pilot Valve by the driver. The Pilot Valve outputs a pressure signal to control the main control valve to work
3.7 Joystick Pilot Valve
Joystick pilot valve works similarly to Foot Pilot Valve.
4 Excavator Engine Parts Diagram
4.1 Engine Repair Kit
This kit includes a full or partial seal when you want to repair your engine.
4.2 Engine Cam Shaft
The engine cam shaft drives the rhythmic movement of the valve. controlling the engine to inhale and exhaust at the right time.
4.3 Engine Rebuild Kit
Engine rebuild kit including piston,liner, pin, piston rings, snap rings, and bushing. generally speaking, those parts should be changed if you want to repair an engine.
4.4 Engine Nozzle
The engine nozzle controls the amount and time of diesel injection, and these parameters are controlled by the engine controller unit.
4.5 Cylinder Head
The cylinder head is installed on the top of the cylinder block. which seals the cylinder from the top and constitutes the combustion chamber. The cylinder head includes intake and exhaust valve seats, valve guide holes, as well as intake and exhaust passages, etc.
4.6 Cylinder Block
The main body of the engine integrates each cylinder and crankcase. it is the supporting skeleton for installing pistons, crankshafts, and other parts and accessories.
4.7 Crank Shaft
The crankshaft is the main component of the engine, which converts the alternating motion transmitted by the pistons into rotational motion.
4.8 Engine Fuel Pump
The fuel pump delivers high pressure fuel to the fuel manifold to ensure a continuous supply of fuel to the injectors. So that the fuel can be injected as required.
4.9 Engine Controller
The function of the valve is to input air into the engine and discharge the exhaust gas after combustion. The structure of the engine is divided into an intake valve and an exhaust valve. The function of the intake valve is to suck fresh air into the engine and mix it with the fuel. the function of the exhaust valve is to discharge the burned exhaust gas and dissipate heat.
5 Excavator Electric Parts
5.1 Hydraulic Control Unit
Read the signals of the relevant sensors. It can output control signals to the hydraulic system. it ensures the stability and smoothness of the excavator's hydraulic system.
5.2 Engine Controller
Through the calculation and analysis of sensor data. the sensor includes engine speed, intake air volume, temperature, etc. The engine control signal is output to ensure the engine normally working.
5.3 Excavator Monitor
An excavator monitor is a display device, it shows the working condition of the excavator, alarms, and prompts. it also is setting device for some working parameters.
5.4 Excavator Wire
5.4.1 Excavator Hydraulic Pump Wire
5.4.2 Excavator Engine Wire
5.4.3 Excavator Internal Wire
5.4.4 Excavator Outer Wire
5.5 Excavator Sensor
5.5.1 Excavator Speed Sensor
5.5.2 Excavator Pressure Sensor
5.5.3 Excavator Water Temperature Sensor
5.5.4 Excavator Air Filter Sensor
Frequently Asked Questions
What are the major parts of an excavator?
Excavator major parts include the arm, boom, bucket, hydraulic pump, main control valve, swing motor, travel motor, engine, etc.
What is excavator arm?
Please refer to the above mentioned 1.4 arm of the main Structure of the Excavator
What is an excavator boom?
Please refer to the above mentioned 1.6 boom of the Main Structure of the Excavator