
How to Fix a Pressure Washer Pump
A Comprehensive Guide to Repairing Your Pressure Washer Pump
If you're experiencing low pressure or leaks from your pressure washer, the pump may be the culprit. This guide will walk you through the steps to diagnose and fix common issues with pressure washer pumps. Whether you're dealing with a clogged inlet filter or a damaged seal, our detailed instructions will help you restore your pressure washer to optimal performance. In this guide, we'll cover essential tools and materials, safety precautions, and troubleshooting tips to ensure a successful repair. By following these steps, you can save money on repairs and extend the life of your pressure washer.
How to Fix a Pressure Washer Pump
Fixing a pressure washer pump can seem daunting, but with the right tools and a little know-how, you can tackle the job yourself. Here’s how to get started:
Quick Facts
Required Tools and Materials
- Adjustable Wrench
- Screwdriver Set
- Replacement Seals and O-Rings
- Inlet Filter
- Safety Goggles
- Gloves
Safety Precautions
Warning
- Always disconnect the power source before starting repairs.
- Wear safety goggles and gloves to protect yourself from debris.
- Ensure the pressure washer is cool before attempting any repairs.
Step-by-Step Instructions
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Step 1: Disconnect the Power
Before you begin, ensure the pressure washer is unplugged and the water supply is turned off.
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Step 2: Inspect the Pump
Check for any visible signs of damage or leaks. Look for cracks, loose fittings, or worn seals.
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Step 3: Clean the Inlet Filter
Remove the inlet filter and clean it thoroughly. A clogged filter can restrict water flow, causing low pressure.
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Step 4: Replace Worn Seals
If you notice leaks, it may be time to replace the seals. Remove the pump cover and replace any damaged seals or O-rings.
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Step 5: Reassemble and Test
Reassemble the pump and reconnect the water supply. Plug in the pressure washer and test it to ensure proper function.
Troubleshooting Tips
If your pressure washer still isn’t working properly after following these steps, consider the following troubleshooting tips:
- Check for air leaks in hoses or fittings.
- Ensure the water supply is adequate and not restricted.
- Inspect the nozzle for clogs or damage.
Comparison of Common Pressure Washer Pumps
Pump Type | Pros | Cons |
---|---|---|
Axial Pump | Lightweight, Compact | Less durable |
Triplex Pump | High durability, Better performance | Heavier, More expensive |
Key Takeaways
- Regular maintenance can prevent pump issues.
- Replacing worn seals can save you from costly repairs.
- Always follow safety precautions when working on your pressure washer.
- Consult your user manual for specific instructions related to your model.

Jaden Bohman is a researcher led writer and editor focused on productivity, technology, and evidence based workflows. Jaden blends academic rigor with real world testing to deliver clear, actionable advice readers can trust.
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