Na-ewebata DHG excavator okpukpu abụọ mkpọchi mkpuchi ngwa ngwa, nke bụ ọganihu mgbanwe na ngwa ngwa hydraulic. Nke a na-akpaghị aka na-akpaghị aka abụọ usoro na-etinye nchekwa mbụ, na-ewepụ mkpa maka ntinye aka nke ntụtụ nchekwa. Nhazi ohuru ohuru, nke nwere isi iyi nchekwa na nko nchekwa, na-enye nchekwa nchekwa okpukpu abuo iji gbochie mmebi. Dị iche na ndị na-ejikọta ngwa ngwa hydraulic nkịtị, nko n'ihu nke DHG ngwa ngwa di na nwunye na-eji ngwaọrụ mkpọchi akpaka iji hụ na nchekwa abụọ na udo nke obi maka ndị na-arụ ọrụ.