If you’re the proud owner of a pressure washer, you know how important it is to keep it in tip-top shape. But what happens when the pump starts to fail? Maybe you’ve noticed a decrease in pressure or a leak that just won’t quit. Whatever the case may be, the need to replace your pressure washer pump is a common challenge faced by many homeowners and professionals alike.
Replacing a pressure washer pump is a simple process that requires some basic tools and knowledge. Start by disconnecting the hoses and removing the old pump. Then, install the new pump and reattach the hoses. Test the new pump to ensure it’s working correctly.
In this blog, we’ll walk you through the steps you need to take to replace your pressure washer pump and get your machine running like new again.
Types of Pressure Washer Pumps

Understanding the different types of pressure washer pumps can help you make an informed decision when it comes to replacing your old pump or purchasing a new one. Below are the different types of pressure washer pumps and their respective advantages and disadvantages.
Axial cam pumps
Axial cam pumps are a type of pressure washer pump that use a series of pistons to create high-pressure water flow. These pumps are known for their efficiency and durability, making them a popular choice for commercial and industrial applications.
Axial cam pumps require proper maintenance and cleaning to ensure their longevity and optimal performance. If you need to replace an axial cam pump, choose a compatible replacement and follow proper installation procedures.
Triplex plunger pumps
Triplex plunger pumps are a type of pressure washer pump that use three plungers to generate high pressure water flow. These pumps are known for their durability and reliability, making them a popular choice for commercial and industrial use.
Triplex plunger pumps are capable of producing pressure up to 5000 PSI and flow rates of up to 10 GPM, making them ideal for heavy-duty cleaning tasks. However, these pumps can be expensive and require regular maintenance to ensure optimal performance.
When replacing a triplex plunger pump, choose a pump that is compatible with your pressure washer’s specifications and to follow manufacturer guidelines for installation and maintenance.
Wobble plate pumps
Wobble plate pumps are a type of pressure washer pump that uses a circular plate with a swash plate to generate pressure. They are common in residential pressure washers because they are simple, affordable, and reliable.
However, they have a lower lifespan than other types of pumps and require regular maintenance to ensure their longevity. To replace a wobble plate pump, the first step is to identify the type of pump on your pressure washer and purchase a replacement pump that is compatible with your machine.
Then, you need to disconnect the hoses, remove the old pump, and install the new pump following the manufacturer’s instructions. Take precautions and wear protective gear when working with pressure washer pumps to prevent injury.
Choosing the Right Replacement Pump

With so many options available in the market, it can be challenging to select the best pump for your pressure washer. Factors such as pressure rating, flow rate, and compatibility with your equipment must be considered before making a purchase. Following is the process of choosing the right replacement pump for your pressure washer, so you can ensure that your machine is functioning at its best.
Matching pump specifications with your pressure washer
When replacing your pressure washer pump, it’s crucial to match the specifications of the old pump with the new one. This includes factors like the PSI rating, GPM flow rate, and shaft size. Failure to match these specifications can lead to poor performance or even damage to your pressure washer.
Be sure to consult the manufacturer’s manual or a trusted professional to ensure you select the right replacement pump for your pressure washer.
Considering the pump’s material and build quality
When choosing a replacement pump for your pressure washer, consider the material and build quality of the pump. A pump made from high-quality materials, such as brass or stainless steel, will be more durable and long-lasting.
A well-built pump will be less prone to leaks and other issues that can arise with lower quality pumps. When making your selection, be sure to research the different options available and choose a pump that is built to last.
Evaluating pump warranty and brand reputation
When replacing a pressure washer pump, evaluate the warranty and brand reputation of potential replacement pumps. A strong warranty can provide peace of mind and protect against defects or failures, while a reputable brand can ensure high-quality materials and reliable performance.
Before making a purchase, research the manufacturer’s reputation and read reviews from other customers to ensure you’re investing in a pump that will meet your needs and last for the long haul.
Tools and Materials Needed

Replacing a pressure washer pump can be a daunting task, but with the right tools and materials, it can be done with ease. Have all the necessary tools and materials on hand before starting the replacement process.
This section will outline the essential tools and materials needed to replace a pressure washer pump. By having everything prepared beforehand, you can save time and avoid any unnecessary trips to the hardware store. So, let’s dive into the list of tools and materials you’ll need to successfully replace your pressure washer pump.
Basic tools for pump replacement
The basic tools required for replacing a pressure washer pump may include a wrench set, pliers, screwdrivers, socket set, torque wrench, and a hammer.
Have the correct tools to avoid damaging the new pump or other parts during the replacement process. It is also advisable to wear safety gear, such as gloves and eye protection, while working on the pressure washer.
Additional materials and replacement parts
Additional materials and replacement parts includes items such as a new pump, gaskets, bolts, and oil. It is essential to have all the required replacement parts on hand before beginning the process of replacing the pump to ensure a smooth and successful repair. Proper tools and safety equipment should also be utilized during the replacement process.
Safety gear and precautions
When replacing a pressure washer pump, it is essential to prioritize safety. Proper safety gear such as gloves, goggles, and a face shield should be worn to protect the eyes and hands from the risk of injury.
The pressure washer should be turned off and unplugged to prevent accidental activation during the replacement process. Follow the manufacturer’s instructions and use caution when handling sharp or hot components. By taking the necessary precautions, the replacement process can be completed safely and efficiently.
Step-by-Step Pump Replacement Guide

If you’re experiencing issues with your pressure washer pump, it may be time for a replacement. While it can seem like a daunting task, replacing a pressure washer pump is a relatively straightforward process that can save you both time and money in the long run.
In this step-by-step pump replacement guide, we’ll walk you through the process of replacing a pressure washer pump, from identifying the issue to removing the old pump and installing the new one.
Whether you’re a seasoned DIYer or a first-timer, this guide will provide you with all the information you need to successfully replace your pressure washer pump and get your equipment up and running again. So, let’s dive in and get started!
Step 1: Disconnecting the pressure washer and removing the hose
The first step in replacing a pressure washer pump is to disconnect the pressure washer from its power source and remove the hose.
This is essential to ensure your safety while working on the pump. Make sure to follow the manufacturer’s instructions for disconnecting the pressure washer and use caution when removing the hose to prevent any damage to the machine.
Step 2: Draining oil and water from the pump
In order to replace a pressure washer pump, it is necessary to drain the oil and water from the existing pump. This will prevent any damage or contamination to the new pump that will be installed.
Follow the correct procedure for draining the oil and water to ensure that the process is safe and effective. This step should be performed carefully and thoroughly before moving on to the next step of the pump replacement process.
Step 3: Detaching the pump from the engine or motor
Step 3 in replacing a pressure washer pump involves detaching the pump from the engine or motor. This requires removing any bolts, screws, or clamps that connect the pump to the engine or motor. Refer to the owner’s manual to locate and properly remove these fasteners.
It is also recommended to take photos or make notes of the pump’s connections to aid in reassembly. Once detached, the old pump can be removed and replaced with the new pump.
Step 4: Removing the old pump and cleaning the mounting area
Step 4 of replacing a pressure washer pump involves removing the old pump and cleaning the mounting area. This is a crucial step that requires careful attention to detail to ensure the new pump is securely mounted and functions properly.
Clean the mounting area thoroughly to remove any dirt or debris that could interfere with the new pump’s installation. Taking the time to properly clean and prepare the mounting area will ensure a successful pump replacement.
Step 5: Installing the new pump and connecting it to the engine or motor
Step 5 involves installing the new pump and connecting it to the engine or motor. Before installation, make sure that the new pump is the right size and specifications for your pressure washer model. To begin installation, align the bolt holes of the pump with those on the frame or base of the pressure washer.
Next, attach the pump to the frame or base using bolts, and tighten them with a wrench. Connect the inlet and outlet hoses to the new pump and tighten the clamps. Finally, connect the pump to the engine or motor using the bolts or screws provided, and ensure that all connections are secure before testing the pressure washer.
Step 6: Filling the new pump with oil and reattaching the hose
Step 6 in the process of replacing a pressure washer pump involves filling the new pump with oil and reattaching the hose. It is crucial to ensure that the oil level is appropriate and that the hose is correctly attached to prevent damage to the pump or the washer.
Following this step will ensure that the replacement is successful and that the pressure washer is in optimal working condition.
Step 7: Testing the pressure washer for proper functioning
Step 7: Testing the pressure washer for proper functioning After installing the new pressure washer pump, test the machine to ensure it’s functioning correctly.
Start by reconnecting all the hoses and fittings that were disconnected during the replacement process. Turn on the water supply, and then turn on the pressure washer. Allow the machine to run for a few minutes to check for any leaks or abnormal sounds.
Next, engage the trigger on the spray gun and observe the pressure gauge. It should read within the range specified in the owner’s manual. If the pressure is too high or too low, adjust the unloader valve until it’s within the correct range.
If the pressure washer is functioning correctly, you can start using it for your cleaning tasks. However, if you notice any issues or abnormalities, turn off the machine and refer to the troubleshooting section of the owner’s manual.
Troubleshooting Common Issues
Following are some of the most common issues that people face with pressure washer pumps and provide some troubleshooting tips to help you get your machine back up and running in no time. Whether you’re dealing with low pressure, leaks, or other problems, we’ve got you covered. So let’s dive in and start troubleshooting!
Identifying and fixing low pressure problems
This section of the content will focus on helping readers identify and fix low pressure problems with their pressure washer pump. It will provide valuable information on common causes of low pressure and offer solutions to help readers resolve the issue.
Addressing water leaks
In the context of replacing a pressure washer pump, addressing water leaks is an important step in troubleshooting common issues. It involves identifying the source of the leak, which can be caused by a damaged pump, worn-out seals, or loose fittings.
Once the source of the leak is identified, the appropriate repair or replacement can be carried out to fix the issue and ensure the pressure washer operates efficiently. Address water leaks promptly to prevent damage to the pressure washer and ensure safety during operation.
Resolving oil leaks and maintenance concerns
In this section, we will discuss how to resolve oil leaks and other maintenance concerns related to pressure washer pumps. We will cover the steps you need to take to fix common issues like worn-out seals or damaged pistons, as well as how to maintain your pressure washer pump to prevent future problems.
By following these tips, you can keep your pressure washer pump in good working condition and avoid costly repairs or replacements.
Conclusion
When replacing a pressure washer pump, first turn off the machine and disconnect the hoses. Next, remove the old pump and install the new one, making sure to properly secure it in place. Finally, reattach the hoses and test the new pump for optimal performance.
As we wrap up this guide on how to replace a pressure washer pump, highlight the benefits of keeping your pressure washer pump well-maintained. A properly functioning pump not only ensures efficient and effective cleaning, but it also prolongs the lifespan of your pressure washer.
However, there may come a time when your pump is beyond repair and needs to be replaced. Knowing when to seek professional help for pump replacement can save you time and money in the long run. In this section, we’ll explore the signs that indicate it’s time for a replacement and why leave this task to the experts. So, let’s dive in and learn more!