He aha nā helu kiko'ī o nā'āpana excavator

E kamaʻilio pōkole e pili ana i nā lako hana pono o kēlā me kēia lā Nā mea kūʻai aku a me nā mea hana maʻamau ʻO ke Aliʻi, nā cylinder litlinder, hydraulic cylinder pistson Inā makemake nui kahi overhaul nui, nā mea e like me nā Vilves Valves, Cylinders