Whether you are a seasoned technician, a skilled construction worker, a knowledgeable engineer, or a proficient mechanic dealing with hydraulic pumps and their associated systems, it is crucial to have a comprehensive understanding of the basic principles behind hydraulic pumps. By doing so, you can ensure that you are utilizing the system correctly and achieving optimal performance.

To begin with, hydraulic pumps can be categorized into three fundamental types: vane pumps, gear pumps, and piston pumps. Each of these types has various variants, along with numerous other components that are vital to comprehend when planning, implementing, and maintaining hydraulic systems.

 

 

What exactly does a hydraulic pump do?

While a hydraulic system is in operation, a hydraulic pump carries out two primary functions. Firstly, it converts mechanical energy into fluid power by drawing oil from the reservoir and into the pump inlet.

Secondly, it pumps the fluid through the pump outlet, forcing it into the hydraulic system. These functions are considered mechanical actions, as they involve the movement and manipulation of the fluid.

 

Does a hydraulic pump create pressure?

It is important to note that hydraulic pumps do not create pressure to propel the hydraulic fluid through the system, as some people mistakenly assume. Instead, pumps generate fluid flow, not pressure. As the fluid flows through the system, it encounters resistance, which in turn creates the necessary pressure to overcome this resistance and allow the fluid to flow smoothly.

 

Different classifications of hydraulic pumps

All hydraulic pumps fall into one of two categories: non-positive-displacement pumps or positive-displacement pumps.

Non-Positive Displacement Pumps - These pumps provide a steady flow of fluid. They are particularly well-suited for low-pressure systems. However, it is important to note that the flow rate output may vary as the system pressure changes.

Positive-Displacement Pumps - On the other hand, positive-displacement pumps are commonly used in high-pressure hydraulic systems. Unlike non-positive-displacement pumps, there is no slippage in positive-displacement pumps. Additionally, it is possible to control and adjust the speed of the pump as needed, offering greater flexibility and precision in hydraulic applications.

 

Common hydraulic pump components

Hydraulic pumps, the heart of any hydraulic system, are made up of various components that work together to ensure efficient and reliable performance. While the specific components may vary depending on the type of pump, there are several key elements that are commonly found in all hydraulic pumps.

 

1. Pump Housing: This sturdy exterior casing serves as the protective shield for the internal components of the pump. It safeguards the delicate parts from external elements and potential damage.

2. Pump Shaft: The pump shaft is responsible for the rotation and movement of the impeller inside the pump. It transfers power from the prime mover to the impeller, enabling the pump to generate the necessary hydraulic pressure.

3. Seals: Hydraulic pumps incorporate seals at different locations to prevent fluid leaks. These seals maintain the integrity of the hydraulic system, ensuring that the hydraulic fluid remains contained within the pump and doesn't escape.

 

In addition to the common components mentioned above, there are several other components that may be present in hydraulic pumps, depending on their specific design and purpose:

 

• Check Valve: A check valve allows the flow of hydraulic fluid in one direction while preventing backflow. It ensures that the fluid moves in the desired direction, enhancing the overall efficiency of the hydraulic system.

• Gears: Some hydraulic pumps utilize gears to transfer power and create hydraulic pressure. These gears mesh together to generate the necessary flow of hydraulic fluid.

• Load Sense Controls: Load sense controls are used in certain hydraulic pumps to adjust the pump's output based on the system's demand. By monitoring the load pressure, these controls optimize the pump's performance and prevent excessive energy consumption.

• Pistons: Pistons are commonly found in reciprocating pumps and are responsible for creating the pumping action. As the pistons move back and forth, they draw in and push out hydraulic fluid, generating the required pressure.

• Rotors: Rotors are crucial components of rotary pumps, such as vane or screw pumps. These rotating elements create the necessary pressure by trapping and displacing the hydraulic fluid.

• Torque Limiter Controls: Torque limiter controls protect the pump and the prime mover from excessive torque, preventing damage to the system. These controls ensure that the pump operates within safe limits, enhancing its longevity.

• Compensators: Compensators are utilized in some hydraulic pumps to regulate the pressure and flow rate of the hydraulic fluid. They maintain a consistent output, even under varying load conditions, providing stability and precision to the hydraulic system.

• Electronic Displacement Controls: In modern hydraulic pumps, electronic displacement controls are employed to adjust the pump's displacement on-demand. These controls offer precise control over the pump's output, allowing for efficient operation in different applications.

• Springs: Springs are utilized in certain types of hydraulic pumps to assist in the movement and positioning of various components. They contribute to the smooth operation and stability of the pump.

• Pressure Valves: Pressure valves play a crucial role in maintaining the desired pressure levels within the hydraulic system. These valves regulate the flow of hydraulic fluid and protect the system from overpressure situations.

• Pressure Compensators: Pressure compensators are responsible for adjusting the pump's output in response to changes in system pressure. They ensure a constant pressure level, improving the overall performance and stability of the hydraulic system.

 

How to choose a perfect hydraulic pump

Choosing the perfect pump for your specific needs can be an exciting journey filled with possibilities! Let's dive into the factors that will help you make the best decision for your applications:

 

1. System Design: Take into consideration the unique design of your system. Does it require a compact pump that can fit seamlessly into tight spaces, or is there room for a larger, more robust pump?

2. Fluid Flow Rate: Determine the desired flow rate of your fluid. Are you looking for a pump that can deliver a high flow rate to meet demanding requirements, or is a lower flow rate sufficient for your application?

3. Pressure Considerations: Assess whether your applications require high-pressure or low-pressure pumping capabilities. This will help narrow down the options and ensure optimal performance.

4. Hydraulic Fluid Compatibility: Consider the type of hydraulic fluid used in your system. Different pumps are designed to handle specific fluids, so it's crucial to choose a pump that is compatible with your fluid to ensure efficient operation.

5. Maximum Operating Pressure: Determine the maximum pressure that your pump needs to handle. This information will help you select a pump that can withstand the demands of your applications without compromising performance.

6. Maintenance Requirements: Evaluate the amount of maintenance your pump will require. Some pumps are designed for minimal maintenance, while others may require more regular upkeep. Choose a pump that aligns with your maintenance preferences and capabilities.

7. Pump Replacement Costs: Consider the long-term costs associated with pump replacement. While initial investment is important, it's equally crucial to factor in the potential expenses of future replacements. Opting for a reliable and durable pump can save you money in the long run.

8. Variable Displacement: Determine whether you require a pump with variable displacement capabilities. This feature allows you to adjust the output flow rate, providing flexibility and control over your system's performance.

 

By carefully considering these factors, you'll be well-equipped to choose the pump that perfectly matches your requirements. Feel confident in your decision, knowing that you've taken all the necessary aspects into account. Happy pumping!

 

Popular hydraulic pumps

 

1. Hydraulic pump for Komatsu Wheel Loader 

For Komatsu Wheel Loader WA200-5 WA200-5L WA200PTL-5 Hydraulic Pump
705-56-26080

Application:

Komatsu Wheel Loader WA200-5 WA200-5L WA200PTL-5

Fitment Details:

WA200-5 S/N 65001-UP (Overseas Version), WA200PTL-5 S/N 65001-UP
WA200-5-SS S/N 65001-UP, WA200L-5 S/N 65001-UP
WA200PT-5 S/N 65001-UP (Parallel Linkage Spec.), WA200-5 S/N 65001-UP
WA200-5-SN S/N 65001-UP, WA200-5 S/N H50001 - Up
WA200PT-5 S/N H60051 - Up, WA200-5L S/N A82001-UP
WA200PT-5L S/N A89001-UP, WA200-5 S/N B10001-UP

Upgrade your Komatsu Wheel Loader with the WA200-5 WA200-5L WA200PTL-5 Hydraulic Pump 705-56-26080! Experience enhanced performance and efficiency like never before. Get ready to conquer any task with ease. Don't miss out on this incredible upgrade for your loader. Get yours now!

 

2. New hydraulic pump for Kubota

New Hydraulic Pump 3A111-82202 3A111-82204 for Kubota M4700 M5400 M6800 M8200 M9000

Condition: new, aftermarket

Part number: 3A111-82202, 3A111-82204, 3A11182202, 3A11182204

Compatible models:
Kubota Tractor M4700 M4700DT M5400 M5400DT M6800 M8200 M9000
M6800 / M6800S (2wd / Rops) - J13000 HYDRAULIC PUMP
M6800 / M6800S (2wd / Rops) - J13500 HYDRAULIC PUMP [COMPONENT PARTS]
M6800DT / M6800SDT (Dual traction 4wd / Rops) - J13000 HYDRAULIC PUMP
M6800DT / M6800SDT (Dual traction 4wd / Rops) - J13500 HYDRAULIC PUMP [COMPONENT PARTS]
M6800HD (Hydraulic Shuttle, 4wd / Rops) - J13000 HYDRAULIC PUMP

The powerful Hydraulic Pump 3A111-82202 3A111-82204, specially designed for Kubota M4700, M5400, M6800, M8200, and M9000 models. Upgrade your machinery with this top-of-the-line hydraulic pump and experience enhanced performance like never before. Don't miss out on this opportunity to take your Kubota to the next level!

 

3. Hydraulic pump for Caterpillar

Hydraulic Pump 201-0920 for Caterpillar CAT Excavator 301.5 301.6 301.8

Part number: 201-0920, 2010920, CA2010920, 202-0879, 2020879, CA2020879

Application: Fit for Caterpillar CAT Excavator: 301.5, 301.6, 301.8

The Hydraulic Pump 201-0920, specially designed for the Caterpillar CAT Excavator models 301.5, 301.6, and 301.8. This powerful pump is engineered to deliver exceptional performance and reliability, ensuring smooth operation and maximum productivity on your worksite. Upgrade your excavator today with the Hydraulic Pump 201-0920 and experience the difference it makes in your projects.

 

4.  Hydraulic Pump VOE for Volvo

Hydraulic Pump VOE 11117047 for Volvo DA25D DA30D A25D A30D A25F A25G A30F A30G A25E A30E

Part number: VOE11117047, VOE 11117047, 11117047

Application: Fit for Volvo Articulated Haulers: DA25D, DA30D, A25D, A30D, A25F, A25G, A30F, A30G, A25E, A30E, A25E 4x4, A25D 4x4

The Hydraulic Pump VOE 11117047 for a range of Volvo models including the DA25D, DA30D, A25D, A30D, A25F, A25G, A30F, A30G, A25E, and A30E. This top-of-the-line pump is designed to deliver exceptional performance and reliability. Upgrade your Volvo's hydraulic system with the VOE 11117047 and experience smooth operation like never before. Don't miss out on this essential accessory for your Volvo. Get yours today!

 

Welcome to Fab Heavy Parts' online catalog, where you can explore a delightful array of hydraulic pumps.  We have a diverse selection to cater to your needs. Our knowledgeable parts team is at your disposal, ready to assist you every step of the way.