Tsarin tafiya na excavator ya ƙunshi firam ɗin waƙa, tafiye-tafiye na ƙarshe na assy tare da akwatin gear, sprocket, abin nadi, raɗaɗi, taron silinda, abin abin nadi mai ɗaukar hoto, taron takalman waƙa, matse dogo da sauransu.
Lokacin da mai tonawa ya yi tafiya, kowane motar motar motsa jiki yana birgima tare da waƙar, motar tafiya tana motsa sprocket, kuma sprocket yana juya fil ɗin waƙar don gane tafiya.