Sethula i-DHG excavator double safety lock lock, okuyintuthuko eguquguqukayo kuma-couplers asheshayo we-hydraulic. Le sistimu yokukhiya kabili ezenzakalela ngokugcwele ibeka ukuphepha kuqala, iqeda isidingo sokufakwa mathupha kwezikhonkwane zokuphepha. Idizayini emisha, efakwe iziphethu zokuphepha namahhuku okuphepha, ehlinzeka ngokuvikela okuphindwe kabili ukuvikela ukungasebenzi kahle. Ihlukile kuma-couplers asheshayo e-hydraulic, ihuku yangaphambili ye-DHG couplers esheshayo ifakwe idivayisi yokukhiya ezenzakalelayo ukuze kuqinisekiswe ukuphepha okuphindwe kabili nokuthula kwengqondo kubaqhubi.