JS220 Travel Motor JS220 Final Drive 20/925318

JCB Excavator Hydraulic Travel Motor JS200 Track Motor JS220 Final Drive 20/925318

The JCB JS220 final drive (part number 20/925318) is a critical component in the hydraulic system of the JCB JS220 excavator. Similar to other excavator final drives, it's responsible for converting hydraulic power into mechanical motion to drive the excavator's tracks. Here are the main components typically found in a Final Drive Assembly:

1. **Hydraulic Motor**: This component converts the hydraulic pressure generated by the excavator's hydraulic system into rotational mechanical energy. The hydraulic motor is usually designed for high torque at low speeds to provide the necessary power for track movement.

2. **Planetary Gearset**: The hydraulic motor's output shaft is connected to a set of planetary gears. The planetary gearset allows for torque multiplication and speed reduction, providing the necessary power and speed control for the excavator's tracks.

3. **Sun Gear**: The central gear in the planetary gearset. It receives power from the hydraulic motor and transfers it to the planet gears.

4. **Planet Gears**: These gears orbit around the sun gear. They transmit torque from the sun gear to the ring gear, providing the necessary reduction in speed and increase in torque.

5. **Ring Gear**: The outer gear in the planetary gearset. It meshes with the planet gears and transfers the rotational motion to the final drive's output shaft.

6. **Output Shaft**: This shaft receives the rotational motion from the ring gear and transfers it to the excavator's tracks via the sprocket.

7. **Bearings and Seals**: Bearings support the rotating components of the final drive assembly, ensuring smooth operation and minimizing friction. Seals prevent hydraulic fluid leakage and contaminants from entering the system.

8. **Housing**: The final drive assembly is housed within a sturdy casing, protecting the internal components from damage and providing structural support.

The final drive assembly is a crucial component of the excavator's drive system, and regular inspection and maintenance are essential to ensure optimal performance and longevity. Genuine OEM (Original Equipment Manufacturer) parts or high-quality aftermarket components designed specifically for the JCB JS220 model are recommended for replacements and repairs to maintain reliability and performance.