Type: It is a piston - type hydraulic pump, which is of high efficiency and reliability, suitable for the hydraulic system of Hitachi ZX40U - 2 excavators7.
Displacement: The specific displacement value is not publicly available, but for similar models of hydraulic pumps, the displacement is generally in the range of 40 - 60
cm
3
/rev.
Pressure
Rated Pressure: Usually, the rated pressure of this type of pump is around 20 - 25 MPa, which can meet the normal working pressure requirements of the ZX40U - 2 excavator's hydraulic system.
Peak Pressure: The peak pressure that the pump can withstand is generally 25 - 30 MPa, which provides a certain margin for the operation of the hydraulic system under special circumstances.
Speed: The maximum rotational speed of the pump is related to the engine speed of the excavator. Generally, it can reach 1500 - 2000
min
−1
. The ZX40U - 2 excavator's engine has a rated power of 29.8 kW at 2500 rpm1. The hydraulic pump speed is matched with the engine speed to ensure the normal operation of the hydraulic system.
