What Causes Hydraulic Gear Pump Failure?

At the heart of the excavator's operation is the hydraulic system. This system's power source is the hydraulic gear pump. The effectiveness of the hydraulic gear pump has a direct impact on the operational efficiency of heavy machinery, such as Komatsu excavators. What exactly is a hydraulic gear pump, then? What is the mechanism? What causes it to occasionally fail? How can you resolve an issue if you run into one? This post from MyMROmarts will help you better maintain your excavator by providing you with answers to these questions.

 

What Is a Hydraulic Gear Pump?

A hydraulic gear pump is a device that delivers hydraulic oil through the rotation of gears and is a positive displacement pump. It usually consists of a driving gear and a driven gear. Its main function is to deliver hydraulic oil from the tank to the actuators in the system. This can drive the excavator to complete various actions. For example, the Komatsu gear pump, which is widely used in Komatsu excavators, is known for its high efficiency.

 

This gear pump is not only suitable for excavators of brands such as Komatsu but is also widely used in other heavy machinery.

 

How does a Hydraulic Gear Pump Work?

The operation of a hydraulic gear pump can be divided into the following steps:

1. Suction phase

When the gears rotate, the space between the teeth is expanded. This creates a negative pressure that draws the hydraulic oil into the pump body.

 

2. Delivery phase

The hydraulic oil moves along the gears and the pump body wall. This prevents direct oil backflow.

 

3. Discharge phase

When the gears mesh, the hydraulic oil is squeezed out. This creates a high-pressure flow that supplies the rest of the system.

 

What Causes Hydraulic Gear Pump Failure?

Understanding the causes of hydraulic gear pump failure can help you quickly diagnose and solve the problem. The following are common causes of failure:

 

1. Hydraulic oil contamination

If particles or impurities are mixed in the hydraulic oil, it will wear the gears and seals. This will also reduce the working efficiency of the hydraulic gear pump.

 

2. Overload operation

If the excavator works for a long time under high load, it is easy to cause the hydraulic gear pump to be damaged. For example, when the excavator gear pump works under conditions exceeding the design pressure, it is easy to fail.

 

3. Excessive oil temperature

Long-term high-temperature operation of the hydraulic system will reduce the viscosity of the hydraulic oil and accelerate the wear of the gear pump.

 

4. Installation problems

When the hydraulic gear pump is not installed properly, the gears and bearings are not properly aligned. This will also cause early damage to the hydraulic gear pump.

 

How to Repair Hydraulic Gear Pump?

When there is a problem with the hydraulic gear pump, you can follow the steps below to repair it.

 

1. Check and clean the hydraulic system

Disassemble the hydraulic gear pump and check whether there is dirt inside the pump.

Clean all parts to ensure the cleanliness of the hydraulic oil.

 

2. Replace worn parts

Check the wear of gears, seals, and bearings. When you find a problem, you should replace the accessories in time. For example, using compatible Komatsu gear pump accessories can effectively restore the performance of heavy equipment.

 

3. Test pressure and flow

After repair, use test heavy equipment to check whether the pressure and flow of the hydraulic pump meet the standards.

 

4. Optimize installation and commissioning

During the installation process, align the hydraulic gear pump well with the hydraulic system. This can avoid new problems caused by improper installation.

 

You may better safeguard your excavator equipment by being aware of its operation, the reasons behind malfunctions, and the repair process. For the best assistance for your excavator, choose the reputable MyMROmarts online store if you're searching for premium hydraulic gear pumps or associated accessories.