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Undercarriage Parts Track link Assy Sprocket Bucket Recoil Spring Shoe Plate
Undercarriage parts for an excavator are critical components that support the machine’s movement and stability. Here's a list of common excavator undercarriage parts, along with their functions:
Track Chains / Track Links
Connect to the track shoes and circulate around the undercarriage frame.
Available in sealed, greased, or lubricated versions.
Track Shoes (Pads)
Flat plates bolted to the track chain that contact the ground.
Available in different widths and types (single, double, triple grouser).
Track Rollers (Bottom Rollers)
Support the weight of the excavator and guide the track along the frame.
Carrier Rollers (Top Rollers)
Help support and guide the upper portion of the track chain.
Idler Wheels (Front Idlers)
Maintain track tension and guide the track at the front.
Sprockets
Engage with the track links and drive the track using hydraulic power from the final drive.
Track Adjusters (Tensioners)
Maintain proper tension in the tracks, typically spring-loaded and grease-adjusted.
Final Drives
Hydraulic motors that power the sprockets to rotate the tracks.
Track Guards / Guides
Keep the tracks aligned, especially when working in rough or uneven terrain.
Bushings & Pins
Wear components in the track chains that allow the links to pivot.
