How To Rebuild A Pressure Washer Pump

A pump is one of the most important components of a machine, without it your machine is a piece of junk. Similarly in pressure washers, the pump is the most important component and a faulty or broken pump means a useless pressure washer. If you have a pressure washer whose pump is either faulty or broken, and you don’t want to spend any money by buying a new unit, don’t worry. In this article, we will teach you how to rebuild a pressure washer pump.

Rebuilding or repairing a pressure washer pump is not an easy task, you will have to be careful and follow all the steps as mentioned.

Steps To Rebuilt A Pressure Washer Pump

As we said earlier, rebuilding a pressure washer pump is not an easy task but it will save you a lot of money. Below are some simple and straightforward steps that you can take to rebuild your pressure washer pump.

1. Check the warranty

First and foremost, check the warranty. Most pressure washers have 1-2 years warranty. If your pressure washer’s warranty hasn’t expired, you can send it back to the manufacturers and let them repair your pressure washer pump. This will not only save you some money but will also save you a lot of time and effort.

2. Troubleshoot your pressure washer

If you want to rebuild or repair your pressure washer pump you need to troubleshoot it and figure out which parts are broken or damaged and needs to be replaced.

3. Siphon the oil from your pressure washer

Siphon the oil in your pressure washer, take a look at it and make sure the oil is not cloudy. Cloudy oil in your pressure washer means there is a leak in your pressure washer and the water is mixing with the oil causing your pressure washer to perform poorly. In that case, you will have to replace the oil and make sure there is no leakage.

4. Prime your pressure washer

If siphoning all the oil and replacing it with new oil doesn’t solve the problem, prime your pressure washer using the primer at the side of your pressure washer. Check if the problem is solved, if not, move on to the next step.

5. Clean chemical strainer

Make sure your chemical strainer is not clogged up. If your pressure washer is performing poorly or the pump is making a clattering sound, it’s not broken, the chemical strainer is clogged up.

To clean the chemical strainer, you will have to unscrew it from the hose and run warm water through it, which will clean any debris inside. You can also use a small brush to remove the debris.

6. Install a new pump

If the above steps don’t solve the problem you will have to replace your old pump with a new one. Installing a new pressure washer pump is a lot safer and easier than rebuilding one.

7. Disconnect the old pump

If you have decided to replace the old pump with a new one, you will need to disconnect the old pump. For that, you will have to disconnect the wire that connects the spark plug to the machine.

After that, you need to disconnect the pump from any inlet/outlet hose and chemical injections. When you are disconnecting the chemical injection make sure you clamp end of the chemical injection tube, this is to avoid spilling the harmful chemicals on yourself or the machine.

When you have disconnected and unscrewed the old pump from your pressure washer, check the thermal relief valve, if it is in working conditions and your new pump doesn’t have a thermal relief valve, you can transfer it to the new pump.

8. Installing the new pump

First you need to clean your pressure washer with a clean cloth and clean all the buildup dirt in the old pump’s place. Now screw the new pump to your pressure washer and make sure you tighten all the bolts and screws.

Connect the spark plug, the inlets/outlets, and the chemical injection to the pump. Test run your pressure washer for 15-20 minutes and make sure everything is working fine and perfectly.

Final Verdict

Above were some of the easiest and most straightforward steps to rebuild, replace or repair your pressure washer pump. All you need to do is read them carefully and follow them, by the end of the day you will have a functional pressure washer with a functional pump.

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