Crafts hydraulic ngwa ngwa njikọ bụ pin grab ụdị ngwa ngwa coupler.Enwere cylinder hydraulic nke valvụ solenoid na-ejikọta na nko nwere ike ibugharị.Mgbe a na-achịkwa cylinder hydraulic na-agbatị ma ọ bụ na-eweghachite, ngwa ngwa ngwa ngwa na-enwe ike ijide ma ọ bụ tufuo ntụtụ nke mgbakwunye gị.Ihe kachasị uru nke ngwa ngwa hydraulic ngwa ngwa bụ na naanị anyị kwesịrị ịnọdụ n'ime ụlọ nke excavator, na-achịkwa ngbanwe nke jikọtara na valvụ solenoid iji mee ka ngwa ngwa na-agbanwe ngwa ngwa ngwa ngwa.