Rubber tracks and wear parts are sold individually unless specified in the details. We offer free shipping across the USA when you order online and ship to a commercial address. *Some restrictions apply.
This is the aftermarket replacement front tension idler for the following Kubota mini excavators:
This idler is a complete assembly with mounting brackets.
The idler must be replaced when significant wear is present to keep the track tensioned properly. If you run on worn idlers the track will lose tension and many other problems will occur such as de-tracking. Keep your track tensioned properly by greasing the tension idler into place and check the tension daily and evaluate the wear on the sprockets and idlers. Uneven wear will result in premature track damage. You will see the best results and longest lifespan of the undercarriage if you maintain the tension and replace worn parts at the same time.
This part is commonly referred to as a tension wheel or tension pulley, but it does not come with the actual spring tensioner. The idler comes fully assembled as seen in the picture.
This idler assembly (RD118-21300) is known to fit:
Here is the complete line of undercarriage parts for the Kubota KX 121-3 including the rubber track, drive sprocket, bottom rollers, top rollers, and tension idler.
Free shipping from one of our seven warehouses.*
* Restrictions apply. See details at checkout.