Replace Your Pressure Washer Pump (We Make It Easy)

Everything in pressure washing has an expiration date. If your luck is like ours, when your pump fails, it will be at the worst time.

If your pressure washer pump is losing pressure, leaking, or making worrisome sounds, it may be on its way out, and it's best to be proactive so it doesn't die on the job.

Good news! We are here to make replacing your pressure washer pump easy. 

If you want one of our expert part advisors to walk you through the process of picking the right pump, give them a call or visit. Otherwise, this guide should help you with your upcoming replacement.

Can I Repair My Pump, Or Will I Need to Replace The Whole Thing?

First, our part advisors can help you troubleshoot if you need help determining the best course of action. Here are some things to consider:

• The Issue: The issue your pump is having may determine if you can get away with repairing it. Leaky valves, O-rings, plungers, and packings are all common replacement items. If you find yourself replacing these parts often, you might have a bigger problem. Throwing more money at it may not be the answer.

• Age: Most pumps have a service life, usually around 10-15 years. If your pump is nearing the end of its days, the value of servicing drops when compared with a minty fresh model. If your machine is pushing 10 years or so, you should consider investing in a new pump for peace of mind.

• Cost: Pumps vary in price, so if a new pump is inexpensive and within your budget, we recommend replacing it outright.

• Type: If you are using an axial or the less common wobble pump, you’ll need to replace the entire unit. Since these come sealed from the factory, components like valves and seals can't be serviced.

How Do I Find The Right Replacement Pressure Washer Pump?

The easiest way to find the right pump? Let one of our advisors do it for you. Note the brand and model number on your current pump and engine when you call. If you don’t have these, knowing model and specs of your engine will help.

If you don't have the model number of your previous pump, you'll need to narrow down your search based on your pump and machine’s specifications. Determine the type of pump you have by identifying the following:

• Drive Type: Direct or Belt

• Engine’s shaft length & diameter

• Your bolt hole-mounting pattern (for direct drive pumps)

• The HP of your engine (to determine what kind of pump it can power)

Once you know these specs, you can use the filters on our pumps page to narrow down the right pump for you.

Can’t find one? Even if we don’t have a Legacy pump for your pressure washer, your dealer will likely still have something for you. Give them a call to see what they have in stock. 

What Are The Different Types of Pressure Washer Pumps?

There are 3 main types of pressure washer pumps - Triplex, Axial, and Wobble pumps.

• Axial pumps: Axial pumps are a common choice in lower-end, consumer-grade pressure washers. These units are maintenance-free, a big plus for casual operators. The trade-off? They can’t be serviced. These are sealed pumps, so you can’t change the oil or swap out valves and seals. When an axial pump reaches the end of its lifespan, you’ll have to replace it. Perfect for light, occasional use, but less ideal for those seeking longevity.

• Triplex Pumps: Triplex pumps are a staple of professional-grade pressure washers, and it’s easy to see why. While they come with a higher price tag, they’re built to handle significantly higher pressures and water volumes compared to axial pumps. What sets them apart is their serviceability—you can replace worn parts and maintain the oil to keep them running smoothly. Yes, they require a bit more upkeep, but their durability and extended lifespan make them the go-to choice for heavy-duty, long-term use.

• Wobble Pumps: Wobble pumps get their name from the way the "wobble plate" moves as it spins. You'll often find these in entry-level pressure washers because due to their cost-effective design. Most wobble pumps are relatively low-performance, and therefore much less common than the Triplex pump design (Not all wobble pumps are lower end. Karcher produces some notable high-performance pumps used in demanding industrial applications.) The big drawback is that these pumps are almost always sealed, meaning you won't be able to change the oil or service them. If you have issues with these pumps, you will have to replace them entirely. 

Can I Upgrade To A Different Type Of Pressure Washer Pump?

Upgrading to a different pump type isn't possible due to their unique designs and mounting systems. Good luck trying to get a triplex pump to mount on a cheap pressure washer designed for an axial or wobble pump!

Depending on what pressure washer you have, you might need to invest in a new unit in order to get a worthwhile performance bump. You can also look into investing in quality accessories and attachments to improve your cleaning experience and shorten the time required to clean.

What Is The Difference Between Belt Drive and Direct Drive Pumps?

Drive types refer to the method used to transfer power from the motor to the pump- either by a belt & pulley system, or by a spinning metal shaft. 

• Direct Drive Pumps are the most common setup you’ll find. In this configuration, the pump is bolted directly to the engine, which makes the system more compact and cost-effective. However, because the pump runs at the same speed as the engine, it can generate more heat and wear out faster. This setup is great for lighter or intermittent use, where portability and cost is key.

• Belt Drive Pumps, on the other hand, are built for endurance. In this setup, the pump is driven by a belt and mounted separately from the engine. This design allows the pump to run at a lower RPM and keeps it isolated from the engine’s heat, significantly reducing wear and extending its lifespan. If you need a machine that can handle long hours of continuous use, a belt drive pump is the better choice.
  

Can I Upgrade to a More Powerful Pressure Washer Pump?

Want more performance from your pressure washer? It may not be as simple as dropping in a more powerful pump.

You'll need to make sure the pump is balanced with the performance of the other parts in your machine. A more powerful pump will need a more powerful engine to keep up. You could mount truck tires onto your lawn mower, but without a stronger motor and transmission, you are going to have a tough time moving as you could with standard tires.

Likewise, mismatching your pump and engine can shorten the lifespan of these other parts.  Plus, you might end up with a weaker cleaning performance than you started with.

As long as your motor has the HP to push it, you can upgrade to a pump with a higher flow rate and pressure, but since your machine is made to work best with its own components, you won't have much room to improve by upgrading the pump alone.

Want to explore your options? Click here for professional advice from a pressure washer expert.

As Long as It Fits, Will Any Pump Work on My Pressure Washer?

If you come across a pressure washer pump that fits your machine, remember that compatibility goes beyond physical dimensions. You wouldn't wear cleats to play basketball (unless you like ankle injuries), and you shouldn't use an unsuitable pump for your engine just because it fits.

As we mentioned above, an incompatible pump can seriously dampen your pressure washer's performance and could even cause damage to other components.

Need help finding the right pump for your engine?  Our expert advisors can help you choose the perfect match. Click here for free advice from a dealer expert near you.

I’ve Replaced My Pump- How Do I Make This New One Last As Long As Possible?

You've invested in a new pressure washer pump – smart move! Now, let's make sure that investment pays off for years to come. Here's how to keep your pump in top shape:

1. Nail the Installation

Proper installation is crucial. This means using the correct sealant, torquing bolts to spec, and avoiding any damage to the pump or seals. A solid installation prevents leaks and ensures your pump starts strong. Need assistance? One of our expert advisors can help.

2.  Stay on Top of Maintenance

Just like your vehicle, your pressure washer pump needs regular TLC to keep running strong. Here's the basics:

• Replace the oil on time: Follow the manufacturer's recommendations for oil change intervals. Fresh oil keeps everything lubricated and running smoothly.

• Check the oil level regularly: Don't let it run low! Make it a habit to check the oil level and top it off as needed.

• Check the oil quality: Look for signs of trouble like debris, discoloration, or a milky consistency. These could indicate water contamination or other issues.

• Look for any water leaks: A leaking pump can lead to serious damage. Regularly inspect for leaks and fix them promptly.

That's the short version. If you want more tips on how to maximize your pump's lifespan, check out our comprehensive guide here. A little preventative care can save you a lot of headache (and money!) down the road.

Who Makes The Best Pressure Washer Pump?

Legacy pumps are the go-to choice for several leading pressure washer manufacturers, and for good reason. These workhorses are built to last, delivering reliable performance in heavy-duty rigs that require strong performance day after day.

Legacy pumps are packed with features like:

• Reinforced aluminum crankcases with thicker cross members and mounting feet to minimize stress while in operation
• Forged brass heads with "deep-well-sealing" valve caps to prevent pressure from impacting the valve cap and threads.
• High-temperature U-Seals offer much stronger sealing performance over a wider temperature range. These run cooler under dry conditions, meaning they last longer and keep your pump running smoothly.

• Precision-machined crankshafts and top-of-the-line bearings ensure smooth, dependable operation.

• Dacromet Finish: Dacromet® coated manifold bolts make a big difference when it comes to corrosion, decreasing rust-related issues.

• Easy Servicing: Legacy pumps are designed with the tech in mind, and are much easier to maintain and service when compared to inferior pump models.

• 5-Year Warranty: Legacy pumps are backed by a 5-year warranty, so you can clean with confidence knowing that your pump works as hard as you do.

Let us help you find the perfect pump for your pressure washer! Legacy offers a wide range of pumps for various commercial and industrial applications. Not sure which one is right for you? Our expert advisors can help you find the perfect match. Find your nearest expert in less than 2 minutes.

Where Should I Buy a Replacement Pressure Washer Pump?

You can order one online, but what happens when that pump arrives and it's not the right fit for your machine? Midway through a pump swap is not the time to discover you've got the wrong part. Even worse, an incompatible pump can slowly damage your engine without you even realizing it.

The Safer Solution: Let a Part Advisor Assist You

Skip the online guessing game and connect with a local dealer advisor. They'll make sure you get the perfect pump for your pressure washer, every time.

Here's why working with a dealer is the smarter choice:

• Expert Advice: Get personalized recommendations based on your machine's make and model.

• Guaranteed Fit: Eliminate the guesswork. Our dealers will make sure the part you purchase is the right fit for your machine.

• Hands-On Assistance: Most dealers offer support with the installation and maintenance of your pump.

• Peace of Mind: Clean confidently knowing that you're getting the right pump and protecting your investment.

Ready to make the process easy? Click here to connect with an expert to get the right pump, every time.