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Final Drives for Excavators: Types and Installation Guide


Excavators serve as indispensable machines across construction, mining, landscaping, and infrastructure development, facilitating tasks like digging, trenching, demolition, and material handling with unparalleled efficiency and precision.

Final drives play a pivotal role in the functioning of excavators, contributing to their efficiency and performance.

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Neglecting maintenance or repairs of final drives in excavators can lead to severe operational disruptions, decreased machine performance, increased repair costs, and potentially, complete breakdowns, halting work progress and impacting project timelines.

Understanding their types and the installation process is crucial for excavator owners and operators. Let's delve into the specifics to grasp the significance and nuances of final drives.

Types of Final Drives:

  • Planetary Final Drives: Planetary final drives are the most common in modern excavators. They feature a compact design comprising multiple gears (planets) revolving around a central sun gear. This arrangement enhances torque output while reducing speed, ideal for heavy-duty applications.
  • Traditional Final Drives: Traditional final drives operate using a spur gear design. They're robust and straightforward, with fewer components compared to planetary drives. While less common today, some excavator models still utilize this design.
  • Hydraulic Final Drives: Hydraulic final drives are prevalent in excavators due to their reliability and robust performance. Powered by hydraulic fluid, these drives transfer power to the tracks, facilitating smooth movement and maneuverability.
  • Electric Final Drives: Electric final drives are gaining popularity for their eco-friendliness and energy efficiency. They employ an electric motor to drive the excavator's tracks, reducing fuel consumption and emissions.
  • Gear Final Drives: Gear final drives are known for their durability and strength. They operate using a set of gears to deliver power from the engine to the tracks, ensuring steady traction and stability during excavation tasks. 

Installation Guide for Final Drives:

  • Assess Compatibility: Before installation, ensure that the chosen final drive is compatible with the excavator model. Check specifications, such as size, power rating, and mounting points, to prevent compatibility issues.
  • Inspection and Preparation: Thoroughly inspect the excavator's undercarriage, removing any debris or obstructions that may hinder the installation process. Clean the mounting area to ensure a secure fit for the new final drive.
  • Mounting Process: Carefully position the new final drive, aligning it with the mounting points on the excavator. Follow the manufacturer's guidelines and use appropriate tools to secure the drive in place, ensuring a snug fit.
  • Hydraulic Connections: For hydraulic final drives, connect the hoses properly, paying attention to the designated pressure and flow rates specified in the excavator's manual. Proper connections prevent leaks and ensure optimal performance.
  • Testing and Calibration: After installation, conduct thorough tests to ensure the final drive operates smoothly. Test the tracks' movement, check for unusual sounds, and perform calibration if necessary to fine-tune the drive's performance.


Final drives are indispensable components of excavators, significantly impacting their functionality. Understanding the different types and following proper installation procedures is essential for maximizing excavator performance and longevity.

By selecting the right type of final drive and adhering to the installation guidelines, excavator owners can ensure optimal efficiency, durability, and productivity in their excavation operations.

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