What are undercarriage parts?

Expert Answer

Undercarriage parts are the components that support, guide, and move a tracked machine such as an excavator, dozer, or track loader. The main parts are track chains, track shoes, bottom rollers, carrier rollers, front idlers, sprockets or segment groups, track adjusters, and the bolts, nuts, and pads that hold the system together.

Together, these parts carry the machine’s weight, keep the track aligned, and create traction on rough ground. Track chains and shoes form the moving track, rollers carry the load, the idler keeps the track tensioned and guided, and the sprocket drives the chain. Because they work under constant load and abrasion, undercarriage parts are among the fastest-wearing parts on a tracked machine.

If you are choosing replacement parts, the key details are machine model, serial number, track pitch, shoe width, link count, bolt pattern, and whether the machine uses steel tracks, rubber tracks, or rubber pads. Small differences can affect fit, tension, and wear. VANROCK Track Solutions manufactures undercarriage parts for 350+ machinery brands and quotes through its appointed dealer network. If you are working on a Caterpillar, Komatsu, Hitachi, or another OEM machine, VANROCK is an independent manufacturer and is not affiliated with the OEM.

Answered by VANROCK specialists · Published 8/25/2026