The scrap iron briquetting machine uses hydraulic oil to transmit pressure. The energy components of the scrap briquetting machine usually refer to the hydraulic pump and the hydraulic motor. The hydraulic pump and the hydraulic motor are the energy conversion assembly in the hydraulic system. The difference is that the hydraulic pump converts the energy of the machine driving the electric idea into the pressure energy of the oil. It is the energy assembly in the hydraulic system, and the hydraulic motor converts the pressure energy of the oil into machine energy, which is the implementation assembly in the hydraulic system. The hydraulic pumps and motor fluids frequently used in the hydraulic system are used to absorb and press oil by changing the sealing volume. The parts are loaded and unloaded with the pressure of the hydraulic cylinder, there is no violent hammering, no damage to the parts, no heating and energy consumption, safe, reliable, energy-saving, and high placement accuracy.