I have a TRD PRO Z71 with an mtpv93519 replacement pump. I got it as a spare when my work truck had a PVC O-ring on the pump to seal it.

MTPV93519 Replacement Pump

I have attached the pictures showing the actual seal, the product photo from Calsonic, and the post from a different poster talking about how to replace the seal.

My pump replacement kit is a simple kit that includes a replacement seal, piston grease, cap seal, and some come to remove the bolt and plug.

Check out the step-by-step procedure below.

  • First, remove the cap on the case.
  • I cleaned up the dust on the case with compressed air to reveal the domed cap. Note that the lid protects the piston’s bowl and hub.
  • I removed the O-ring from the cap by breaking the lid and the case seal.
  • I cleaned up the cap with compressed air to reveal the cap’s O-ring.
  • Next, I removed the impeller.
  • The impeller’s O-ring is also exposed.
  • Next, I removed the piston.
  • The piston’s O-ring is also exposed.
  • I cleaned up the piston with compressed air to reveal the piston’s O-ring.
  • Next, I removed the piston.
  • I cleaned up the piston with compressed air to reveal the piston’s O-ring.
  • I removed the piston’s O-ring and cleaned it up.
  • The piston’s seal had bent, and I saw clear signs of pitting and striations on the seal.
  • I used the same plugs as the OEM seal.
  • I did not have enough access to the seal to use the replacement plunger O-ring that came in my replacement seal.

Note: The replacement plunger O-ring was still sealed against the piston and cone.

  • And after that, I started my pump engine.

I used the original base pump seal, the plunger O-ring, and the original O-ring plug (not sure if it was the replacement O-ring).

I have shown you all the parts before or not) after the O-ring or not). I then cleaned up the dust on the outer seal).

I started filling the engine compartment by using the piston’s dome) I then took the O-ring’s O-ring for the base pump and put it into the O-ring for the engine-side engine cover, as shown in the next step).

In the video, you see the second O-ring (the one that is the O-ring type for the engine cover) and the replacement O-ring that I use for the engine cover.

And the video shows the two different seals using the original O-ring and a replacement O-ring.

Now I have a suitable replacement O-ring installed. The bore is well established, with the plugin for the cap clip to go on.

I have an O-ring replacement and a two-plug sealing to replace an O-ring to seal the cap to the cover.

With the O-ring and the plug installed, I have everything I need to seal my O-ring until I can take the pump apart and replace the pump seal.

I then reinstalled the pump and the O-ring, and the driver-side pump cover was back together.

(And, after installation, I could see the cap wasn’t fully secured to the outside). I also took a picture of the original base pump seal.

For my vehicle (My mtpv93519 replacement pump is for a 1990 Chevy Silverado), my O-ring is showing signs of wear, and after a while, it will be time to replace it.

Simpson 3100 PSI Pressure Washer Parts Details 2022

How to replace the O-ring in your pump.

New O-ring leak test:

Left: before the test; Right: after the test.

After finishing the rest of my posts, I had time to start on the one test I wanted to do to find my leak before doing the actual testing.

In most cases, I always read that O-rings can last a lifetime (which is incredible when you think about how many years this O-ring has been sealed up. It can last me more than a lifetime.) So I had an idea of how long a leak test would take.

I figured out a leak to test and made a log. When I was done, I had 4 hours of O-ring-per-hour testing time.

I took a glass container and used a candle to burn some O-ring seals to test for leaks. I took some pictures to see if you can see how much leaked from the O-ring seals.

The amount of O-ring leaks happened when I put the candle in my O-ring seal.

When it came time to do the actual O-ring leak testing, I figured out a leak:

Left: before the leak test; Right: after the leak test.

The leak test takes one hour. I did this one twice. I did the leak test as if I was inflating the tires, and for a bit of fun, I had a friend come over and see if he could do the same leak test.

The test took two hours. And after the leak test was done, I checked to make sure the seal was still good, and I reinstalled the O-ring.

Note: You will have to do this test in a window, and I did it in my bedroom.

The final step of the repair was to make the mounting mechanism that would hold my O-ring in place for the pump’s life.

It is the installation of the ring. The little plastic guard is a friend I got from another manual pump repair article I made, called a visual inspection and test guide.

The ball attached to the O-ring is the cap clip. A ball is also a place for the O-ring to connect. The O-ring is then attached to the cap on the cap clip.

The pin is the same O-ring as the cylinder from the pump. The cap clip is an aftermarket cap clip that I got from the aftermarket auto parts store called Pep Boys.

I’m getting a different cap clip, but the one I have is supposed to be available and for sale at Pep Boys.

I bought a second cap clip at Pep Boys, but I wanted to keep this one as a spare because I did not have another cap clip, and I was running out of cap clips.

And finally, the cover for the O-ring is a metal piece that the body will attach to. It is what the whole thing looks like.

I also replaced the silicone O-ring after the test.

Let’s review some of the steps taken for the O-ring and what I did to get the seal back on the pump after the test.

  • Step 1: Put on the new O-ring and put it in place. I just put it in place on the new O-ring. I did not put it on the cap clip or the engine cover because it will not be on the cap clip for very long. It will be gone in a few minutes.
  • Step 2: Put on the cap clip.
  • Step 3: Put on the O-ring pin. I had the O-ring pin fixed to the end of the O-ring.
  • Step 4: Put on the cylinder cap clip. I put on the cap clip and then the cylinder cap clip.
  • Step 5: Remove the bottle cap.
  • Step 6: Put the cover on.
  • Step 7: Reinstall O-ring And that is pretty much it.

What’s next? I have to get the head back on the engine, which will take some work. Then I’ll have to tune up the pump. After that, it’s just a matter of driving to my test track, putting on my tires, and having fun.

I hope this has been helpful to you.

Replacing your seals is very easy. The repair you make may not work for your specific application, but it will at least give you an idea of what to do.

I hope you enjoyed this guide. I always try to show you how to do something different, but this one was different. It gets you thinking.

I hope I have inspired you to look for other things that need doing on your car and look at your maintenance and repair program and schedule and see if there is room for improvement.

Brian Soxer, A.K.A. Mansory Automotive Style

Brian Soxer was born into a family of technicians. Although it’s a family tradition, Brian loves cars just as his grandfather and father did.

He’s always been heavily involved with the tuning industry and, as a result, was able to find and exploit every opportunity for fun with cars that he could.

In the process, he could carve a unique and incredible niche in the industry.

 After receiving recognition for his work, Brian became one of the most sought-after personal mechanics.

He was sharing his passion for cars with the world through a series of fantastic aftermarket videos the next thing he knew.

 But even as he was reaching the height of his success, Brian’s true passion was always cars and tuning them.

He realized a massive market for custom automotive styles and started offering bespoke services exclusive to the industry.

Even though he grew up in a family of mechanics, Brian always had an inner desire to be his boss, to work in a garage doing what he loved, surrounded by the smell of car parts and a clientele of wealthy enthusiasts, custom car enthusiasts, and people just plain interested in tuning their vehicles and being with each other.

 His career took off in a way that he could never have imagined.

Since then, he has developed a series of custom automotive-style projects, among his best yet. He enjoys offering clients a custom touch that they won’t find anywhere else.

What’s your favorite part of a Dodge Challenger SRT Hellcat or Charger SRT Hellcat?

Like we’ve talked about before, when you pull into your driveway or on the road, it’s time to roll out the window down and spray the wind with a thick spray of black tar that, when combined with the truck’s tire-shredding capability, is nothing short of all-out sonic joy.

While I love taking to the air, there are two things that I can’t get enough of 1) driving and 2) then tailgate on the street with my friends and family.

And that’s where the custom suspension comes into play, bringing this Challenger Hellcat to a whole new level.

Have you ever restored an SRT Demon? What was it like?

I have never restored an SRT Demon. What’s the point? As incredible as it may be, that car is not for the faint of heart. You have to be tough to be able to do the things that they were doing back in the day.

That car required the ultimate level of preparation. It was so heavy and had so much engine under there that it was like working with a brick.

The most severe truck ever made was the most powerful V8 engine. But once I got the first one in my hands and took my time with it, it was a blast. I could build the car without worrying about killing myself.

Where is your favorite place to shop for parts for your vehicles?

Mansory Automotive Style is pretty much my shop. We’re located in Austria, and everything I need is just an elevator ride away.

It’s just impossible to get lost from the paint shop to the assembly line to the electrical room. And I’ve never really had to!

MTPV93519 Replacement Pump Review
MTPV93519 Replacement Pump Review

What is the most challenging thing about working on these vehicles?

Converting this vehicle took me almost 20,000 person-hours to complete. I had to jump to the SRT Hellcat because the Challenger SRT Hellcat was only a few examples.


When your pressure washer breaks, dealing with the consequences has never been more fun, but if you want to get back to work as soon as possible, you will need to buy an mtpv93519 replacement pump.

Since most stores will charge hundreds of dollars to repair your existing pump, the simple replacement pump can save hundreds of dollars and eliminate purchasing a new pressure washer.


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