The 144-6799 and 226-4049 are interchangeable part numbers for the 301.5 through the 301.8 Caterpillar® mini excavator series. This idler assembly is fully assembled with the bushing and seals and it arrives ready to install using your existing mounting brackets. The idler ships without the mounting arms in most cases so you just need to push the roll pins out of your existing idler arm brackets and reuse your original mounting brackets for installation. 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.
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