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 tension idler designed for the following Caterpillar® mini excavator models:
This is the larger roller wheel that pushes out as you grease the tensioner to tighten the rubber track.
Use the blue arrow to reference where the idler is installed, on the opposite side of the undercarriage from the sprocket.
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