Kubota KX033-4 Tension Idler Assembly

Aftermarket Replacement | Part #RD118-21300

This tension idler assembly is built for the Kubota KX033-4 mini excavator and comes as a complete, ready-to-install unit with the required mounting brackets. The spring tensioner is not included.

The idler should be replaced when significant wear is present to maintain proper track tension. Running your machine with a worn idler can cause the track to lose tension, increase the risk of de-tracking, and contribute to accelerated wear across the entire undercarriage. Daily tension checks and consistent monitoring of idler and sprocket wear are recommended to maximize track life and prevent uneven wear.

While commonly called a tension wheel or tension pulley, this component functions as the idler that the tensioner pushes against to tighten your track. The assembly ships exactly as pictured—fully assembled and ready for installation.

These single-flange idler assemblies are built to original Kubota specifications and use high-quality seals to keep dirt out and lubrication in for long-lasting service. Guaranteed fit for the KX033-4.

WARNING: Cancer and Reproductive harm. See www.P65Warnings.ca.gov