hitachi excavator hydraulic pump

Hitachi ex60 hydraulic pump maintenance instructions 1. When the excavator is working and the pump abnormal sound, the excavator vibrates, or the computer board displays a fault code or an alarm, be sure to stop the machine to check whether it is caused by the hitachi ex60 hydraulic pump failure. 2. When the operating environment temperature of the excavator is very low, it is necessary to run the excavator idling for more than 10 minutes after the excavator is started. After the temperature of the excavator rises, load the excavator to ensure that the hydraulic pump of the excavator works normally. 3. The excavator must always pay attention to whether the hydraulic oil temperature of the excavator is too high? Is the water temperature of the excavator too high? ex60 hydraulic parts: hydraulic pump and accessories, pump cylinder plane, plunger, cylinder block, return plate, nine-hole plate, transmission shaft, pilot pump, thrust plate, swing seat (swing assembly), ball dumpling, friction plate, Separator, oil distribution pan, hydraulic plunger pump accessories, lifter, ball joint and other hydraulic pump accessories.

Hitachi ex200 hydraulic pump is the power source of the hydraulic system of the excavator, and it is an energy conversion device that converts mechanical energy into hydraulic energy. In the hydraulic excavator, the hitachi ex200 hydraulic pump is also the most faulty component. Once the hydraulic pump fails, it will immediately affect the normal operation of the excavator's hydraulic system, or even fail to work. What are the common faults of the hydraulic pump?

hitachi ex120 hydraulic pump installation precautions： Pay attention to check the display value of the counter class Observe the display value of the pressure gauge of the hydraulic circuit, the vibration status and stability of the pressure switch light signal at any time, so as to find out whether the hydraulic circuit is functioning properly as soon as possible. Pay attention to observe the action of the machine (for the modified pump) Improper design of the hydraulic circuit or poor manufacturing of components are not easy to find in the initial use stage, so special attention should be paid to the action states that appear under various operating conditions. Pay attention to the adjustment in each valve Fully understand the use of pressure control valve, flow control valve and directional control valve, pay special attention to the adjustment range and limit, otherwise adjustment errors will not only damage the machine, but also pose a threat to safety.

Excavator Hitachi ex100 hydraulic pump installation precautions (1) Ensure that the hydraulic oil is very clean The hydraulic oil directly enters the Hitachi ex100 hydraulic pump. If there are impurities in the hydraulic oil, the structures such as the plunger and the distribution plate will be worn, causing damage to the hydraulic pump, and even the hydraulic pump will be scrapped! Therefore, the hydraulic oil filter must be a genuine filter. Generally, the higher the density of the filter, the better the quality of the filter! (2) After the Hitachi ex100 hydraulic pump is installed, there is no hydraulic oil, and it is strictly started. It is necessary to add hydraulic oil to the oil return pipe. (3) Pay attention to the discovery of abnormal phenomena at any time Abnormal sounds, vibrations, or abnormal signals of the monitoring system must have their reasons. When an abnormal phenomenon is found, immediately find the circuit diagram, follow the diagram to find out, and carefully observe whether the abnormal phenomenon is caused by a temporary error. Assess the need for parking. For example, pressure, load, temperature, time, start-up, and stop all include the reasons that may cause abnormal phenomena. Usually, it should be analyzed and discussed item by item.