What are the names of excavator undercarriage parts?

Expert Answer

The main excavator undercarriage parts are track chains, track shoes, track rollers, carrier rollers, idlers, sprockets or segment groups, track adjusters/recoil assemblies, and the track frame. Depending on the machine, you may also see track guards, rubber pads, track bolts and nuts, pins and bushings, and mounting hardware.

In simple terms, the undercarriage is the bottom section that carries the machine and makes it move. Track shoes provide ground contact and traction, track chains link the running gear together, bottom rollers support the weight, carrier rollers guide the upper track, and the idler and adjuster help keep correct track tension. The sprocket or segment group drives the chain as the final drive turns.

If you are checking wear, look for common symptoms such as loose tracks, uneven wear on shoes or rollers, noise from the front or rear of the frame, chain elongation, missing hardware, or vibration while traveling. These signs often point to parts that need inspection before they damage other components. Track shoes and pads should also be chosen for the surface you work on, since steel and rubber options serve different conditions.

When ordering replacements, use the machine model, serial number, and key measurements such as track width, pitch, number of links, and roller diameter so the parts match the undercarriage correctly. Avoid guessing by appearance alone, because similar-looking parts can differ by brand and model. VANROCK supplies excavator undercarriage parts through its appointed dealer network and quotes pricing on request. If you are looking for Caterpillar, Komatsu, or another OEM brand, VANROCK is an independent manufacturer and is not affiliated with those OEMs.

Answered by VANROCK specialists · Published 7/26/2026