Free Shipping to commercial address. *Restrictions apply


Kubota KX 080-3 KX 080-4 Idler Assembly

RD809-21300 Kubota Idler
Kubota KX 080-3 KX 080-4 Idler Assembly
The RD809-21300 is the direct replacement idler for the Kubota mini excavator model KX 080-3 and KX 080-4 for sale online at Rubbertrax. Check out online for free shipping to commercial addresses. This idler assembly is too heavy to ship on ground carriers so it must be delivered to a commercial address via freight truck.
SKU: RD809-21300
Weight: 180 lbs
Make: Kubota
Shipping: Fast and Free!
Price: $1,090.00

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.

The RD809-21300 is the original part number for the Kubota KX080-3 tension idler. The idler also fits the KX080-4 series and we guarantee fit for both models. This is the aftermarket idler for the following Kubota mini excavators:

  • Kubota KX 080-3
  • Kubota KX 080-4

Replacing your tension idler is crucial to proper track functionality. A worn idler can cause a rubber track to de-track and cause major damage to the track and the undercarriage. Keep your track properly tensioned and replace your idler if you have any issues tensioning the tracks. If your idler is showing significant signs of wear or making noise then you should consider bringing it in for maintenance before a failure in the field. This idler is very heavy and a failure in the field would be a costly experience. Check your idler frequently for proper tensioning and function.

Alternate Part Numbers

  • Kubota Dealer Part Number: RD809-21300

Alternate Models

This idler assembly (Kubota: RD809-21300) is known to fit:

  • Kubota KX080-3
  • Kubota KX080-4

KX080-4 Undercarriage Parts

We stock the full undercarriage for the Kubota KX080-3 and KX080-4: