https://www.summitrubbertracks.com/Undercarriage/Idlers/makemodel/TRACKS__UNDERCARRIAGE_HITACHI_ZX40U_3_ID323
makemodel: TRACKS__UNDERCARRIAGE_HITACHI_ZX40U_3_ID323
Summit Supply stocks front idlers and rear idlers for most rubber tracked skidsteers and mini-excavators that are guaranteed to fit and made with hardened steel
makemodeltracksundercarriagehitachi