Excavator Hydraulic Pump

hitachi hydraulic pump maintenance instructions
When the hitachi hydraulic pump of the excavator is first used, pay attention to whether the pump has abnormal noise? Because it is easily affected by air bubbles and dust at the beginning of operation, poor lubrication at high temperature or overloading of conditions, etc., make the hydraulic pump emit abnormal sound.
Pay attention to the displayed value of the pressure gauge of the hydraulic circuit of the excavator at any time.
Understand the function of each valve inside the hydraulic pump system of the excavator.

The speed of the hydraulic pump is also related to the control pressure. The control pressure comes from the valve group, with positive control and negative control. The positive control oil pressure signal comes from the differential pressure, the higher the pressure, the greater the hydraulic pump flow, which is a proportional signal.

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.

What k3v112dt main pumps do:
1) k3v112dt main pump has high transmission efficiency to give full play to the power and fuel economy of the engine.
2) The hydraulic system and hydraulic components have sufficient reliability under the action of large load changes and sharp vibration and impact.
3) Coordinate lightweight and vibration-resistant coolers to reduce the total heat generation of the system, so that the hydraulic oil temperature does not exceed 80 degrees when the main engine continues to work, or the temperature rise does not exceed 45 degrees.
4) Due to the dust in the excavator operation site, the hydraulic oil is easily polluted. Therefore, the sealing performance of the hydraulic system is better, and the hydraulic components are less sensitive to oil pollution. The entire hydraulic system should be equipped with an oil filter and a dust-proof device.
5) Hydraulic or electro-hydraulic servo control device is adopted, so that the excavator can set up an automatic control system, thereby improving the technical performance of the excavator and reducing the labor intensity of the driver.

Features of hpv118 hydraulic pump
1、High working pressure: rated working pressure up to 275 bar
2、High volumetric efficiency: typical volumetric efficiency is 0.94
3、Wide speed range: the speed range is 600~2800 rpm (400~2800 rpm for vehicle)
4、Low speed/low pressure/high viscosity operation capability of hpv118 hydraulic pump
5、Low pressure pulsation/Low noise
6、Strong anti-pollution ability
7、Double shaft seal option

We are strict with the quality of k3sp36c hydraulic pump, We stick to provide high-quality products and good services to customers and attach great importance to the material and manufacturing technique of products to ensure the interests of our customers!
In the future, we will continue to learn more professional knowledge about the k3sp36c hydraulic pump and increase our procurement and sales experience, to provide customers with better products and services!

Performance Character of k5v80dtp hydraulic pump
1.High-strength aluminium alloy housing, light weight; 
2.Alloy steel gear transmission, stable and durable 
3.Flange installation mode: SAE Standard 
4.Oil inlet and outlet connection: Screw thread 
5.Input axis connection: Woodruff key; 
6.Auto-compensation unit of axial and radial clearance; 
7.SP series gear design, small fluctuation, high pressure, low noise; 
8.High volume efficiency and mechanical efficiency of k5v80dtp hydraulic pump;