Kubota 121-2 Front Idler RD101-21300

New undercarriage parts and rubber tracks are sold individually but we suggest replacing all of your worn parts at the same time.

This is the aftermarket replacement front tension idler for Kubota 121-2 and 121-2SS 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. Keep your track tensioned properly by greasing the tension idler into place and check the tension daily and evaluate the wear on the sprocket 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 wear parts at the same time.

Alternate Part Number:	Kubota dealer part number: RD101-21300, RD108-21300
Alternate Model:	The RD101-21300 tension idler is known to fit the KX121-2 exclusively.
Alternate Part:	There are no known alternate part listings for the KX121-2 mini excavator, this idler wheel is guaranteed to fit.

Kubota KX 121-2 Construction Parts:

Here is the complete line of undercarriage parts for the Kubota KX 121-2 including the rubber track, Drive Sprocket, Bottom Rollers, Top Rollers, and Tension Idler.