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Excavator

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Mayank Chandwani

Study basic parts of an excavator. This will help you to learn basic parts in brief along with visual images on the side, which might help you to remember it easily.

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Excavator
Excavator
INTRODUCTION It is a completely Hydraulic machine. It consist of 4 hydraulic cylinders that can be subdivided into 2 boom cylinders, 1 arm cylinder and 1 bucket cylinder.
USES Digging of holes and foundations. Construction Mining
MAIN PARTS Bucket Swing motor. Centre joint and Bearing. Hydraulic pump primary and secondary. Control valve(Brain of hydaulic) MRV(main relief valve) and ORV(over relief valve) Travel accessories.
Bucket GP(general purpose) bucket used for soil like soft material and has a capacity of 0.71 meter cube. HP bucket used for mining and has a capacity of 0.65 meter cube. Two main types of teeth used are forged and cast teeth. The main difference is actually in impact cast does not react well to high torsional force as it is more brittle compound.
SWING MOTOR
Hydraulic Pump It contains two pumps primary and secondary. Two hydraulic pumps are used because the machine is fully hydraulic so to maintain the flow of oil and all possible conditions.
CONTROL VALVE It can be called as Brain of the machine. Each and every hydraulic part of the machine is attached to it by a pipe in which hydraulic fluid flow
Main Relief Valve It is used to maintain the pressure inside the hydraulics. It is always attached between the pump and all hydraulic lines Whenever back pressure is generated in any of the pistons, if it gets directly transferred to the pump can damage it, but if MRV is attached, the back pressure is controlled and transferred to the tank.
TRAVEL PARTS

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Excavator

  • 3. INTRODUCTION It is a completely Hydraulic machine. It consist of 4 hydraulic cylinders that can be subdivided into 2 boom cylinders, 1 arm cylinder and 1 bucket cylinder.
  • 4. USES Digging of holes and foundations. Construction Mining
  • 5. MAIN PARTS Bucket Swing motor. Centre joint and Bearing. Hydraulic pump primary and secondary. Control valve(Brain of hydaulic) MRV(main relief valve) and ORV(over relief valve) Travel accessories.
  • 6. Bucket GP(general purpose) bucket used for soil like soft material and has a capacity of 0.71 meter cube. HP bucket used for mining and has a capacity of 0.65 meter cube. Two main types of teeth used are forged and cast teeth. The main difference is actually in impact cast does not react well to high torsional force as it is more brittle compound.
  • 8. Hydraulic Pump It contains two pumps primary and secondary. Two hydraulic pumps are used because the machine is fully hydraulic so to maintain the flow of oil and all possible conditions.
  • 9. CONTROL VALVE It can be called as Brain of the machine. Each and every hydraulic part of the machine is attached to it by a pipe in which hydraulic fluid flow
  • 10. Main Relief Valve It is used to maintain the pressure inside the hydraulics. It is always attached between the pump and all hydraulic lines Whenever back pressure is generated in any of the pistons, if it gets directly transferred to the pump can damage it, but if MRV is attached, the back pressure is controlled and transferred to the tank.