Buy aftermarket Cat mini excavator parts for your 303.5 and 303CR online at Pentom Parts and save versus going to your local dealer. Our parts are guaranteed to fit. This idler wheel is designed for the Cat 303.5 and 303CR models. Parts may vary for sub models.
This is the aftermarket replacement rear idler for the following Cat mini excavators:
This is the idler at the rear of the undercarriage just below the sprocket. It is the larger roller wheel at the back and there is only one per side, two total on the entire machine.