Used Excavator Sprocket

Sprocket for Mini-Excavators: The Most Requested Undercarriage Part

The sprocket is the drive gear located at the rear of the chassis, transmitting power from the travel motor to the track through its teeth. It propels the machine forward: the hydraulic travel motor rotates it, and the sprocket teeth engage with the track links to move the machine.

On compact mini-excavators, the sprocket is particularly stressed due to tight turning radii and frequent directional changes on urban sites. Therefore, it is one of the most common wear parts of the undercarriage to monitor as soon as the machine starts to lose travel efficiency.

Kubota Mini-Excavator Sprockets: A Common Case

For Kubota mini-excavators, the sprocket is among the most regularly replaced undercarriage parts. Models such as KX080-4, U36-4, and equivalents feature specific gear configurations with size and mounting hole patterns unique to each series. It is essential to provide the exact model of your machine to ensure compatibility before ordering.

Excavator Sprocket Maintenance: How to Limit Premature Track Wear?

The sprocket and track wear together: a damaged sprocket accelerates the wear of the track links, and vice versa. Regular maintenance extends the lifespan of both components.

Main causes of premature sprocket wear include:

• Operating in abrasive terrain (sand, crushed granite, rocks)
• Frequent sudden changes in direction
• Insufficient track tension causing excessive play between links and teeth
• Build-up of dirt and debris in the teeth leading to lateral wear

Regular visual inspections during routine maintenance help anticipate replacement before breakdowns immobilize the machine on site. Key points to monitor are:

• Uneven sprocket tooth wear, often indicating track misalignment
• Material loss on the sides of the teeth
• Cracks in the sprocket steel body

Excavator Track and Sprocket: Two Parts to Inspect Together

The sprocket is not the only undercarriage part to monitor. When replacing it, it is an opportunity to inspect the entire rolling system. Excavator tracks should show even wear on the links; if some links are more worn, the sprocket or the bottom rollers are likely the cause.

Parts to check simultaneously during sprocket replacement include:

• The front idler wheel to ensure no play in its axle
• Bottom rollers and top rollers for any bearing leaks
• Track tension, to be adjusted systematically after any undercarriage component replacement

Our Range of Sprockets for All Brands

Our dismantling operations cover sprockets for the main tracked machinery brands. Here are the most represented brands in our stock:

• Caterpillar: tracked excavators of all series
• Volvo: EC excavators from 14 to 480 tons
• Liebherr: tracked and wheeled excavators
• Komatsu: mini and medium-tonnage excavators
• Case: backhoe loaders and tracked excavators
• JCB: mini and tracked excavators
• Kubota: compact mini-excavators of all series
• Hyundai: tracked excavators and mini-excavators
• Doosan: medium and heavy tracked excavators

Each sprocket undergoes inspection before resale:

• Condition and profile of sprocket teeth
• Wear of gear tooth profile
• Integrity of steel (no cracks)

Sprockets with cracked steel or excessively worn teeth are not sold. To verify compatibility with your machine, please provide the brand, model, and serial number to our technical team.