In early January, I nearly paid $4,180 for a set of Kleemann crusher parts that would not have fit our machine. I caught it because of a text about my dog Rose and a prescription for Simparica for dogs. That is a strange sentence, I know. Give me a couple of minutes to explain.

I've been handling parts procurement for a mobile crushing crew for eight years. I keep a mistake log—because I've made enough of them to realize I don't learn the first time. This near-miss might be the closest I've come to a costly, embarrassing failure. It should have been a routine purchase.

The story: our Kleemann MC 110 Z EVO2 jaw crusher lost its toggle plate on a Tuesday morning. The quarry manager needed the machine running by the following Monday. The local dealer quoted $5,300 for the genuine part with an 11-business-day lead time. That timeline wasn't going to work, so I went looking for alternatives.

I found an online parts broker with a listing that said "Genuine Kleemann crusher parts: toggle plate and cheek plates for MC 110 Z EVO2." Total price: $4,180 delivered. The broker promised next-day air freight. I called him, and he confirmed the kit fit our model. I felt like a hero. I asked him to send the invoice.

Then, while I was about to approve the payment, my wife texted: "Rose has fleas. Vet says Simparica for dogs. Which one is it?" I did what any non-pet-person would do: I typed "what is Simparica" into a search box.

The short answer: Simparica for dogs is a prescription chewable that contains the active ingredient sarolaner. It kills fleas and ticks and starts working quickly. What caught my attention wasn't the medication itself—it was the phrase "active ingredient." A brand name tells you who made it. It doesn't tell you what it actually is, what dose it is, or whether it's right for the animal in front of you.

I looked at my open purchase order again. It said "Kleemann crusher parts" in big letters. It didn't list an OEM part number. It didn't mention a serial number or a generation. I had ordered something based almost entirely on a brand and a model name.

I pulled up the aftermarket drawing from the listing. It showed a toggle plate and cheek plates, but the drawings were generic—the kind of outline you'd see on a stock photo. There was no Kleemann part number, no revision, no dimensions beyond a few nominal measurements. I emailed the drawing to our local Wirtgen Group dealer's parts desk and asked them to compare it with the current factory part for our exact serial number.

The reply came from a person named Andrea Kleemann. Yes, that was her email signature. I don't know if she's related to the family or not—I never asked. What matters: she sent back a screenshot from the Kleemann parts system. The part I was about to buy was for the previous generation of the same crusher platform. The bore spacing was 14 millimeters off. It would not have fit.

"If you can go back to the original order, do it." — Andrea Kleemann, parts email

I called the broker to cancel. He tried to argue that the listing "fits all MC110 series." That phrase alone—all series—told me everything I needed to know. It's exactly the kind of vague language you only use when you don't actually know the part. I hadn't paid yet, so I simply didn't. That was the end of the order, but not the end of the lesson.

What almost went wrong (and what actually went wrong)

The surprising part was not that a parts listing was misleading. That's almost expected in online B2B parts. The surprise was how easily I bypassed every basic check I'd built over the years. I was in a hurry, the price was attractive, and the model name matched my machine. That was enough for my brain to say "good to go."

The part may not have been fake. It might have been a real Kleemann part—but for a different version of the machine. Real or fake doesn't matter if it doesn't fit. A 12mm wrench also won't fix a 13mm bolt.

I don't have hard data on how many online Kleemann crusher parts listings are mislabeled. I can tell you anecdotally that in the past 18 months, our team has caught 47 potential errors using the checklist below. Most were small. A few would have left us with an extra machine down. This one was the closest to costing us real money and credibility.

The Kleemann crusher parts check I now use

Before I hit approve on any parts order, I ask these five questions:

  • What is the exact OEM part number? If the listing doesn't have one, that's a red flag. "Fits MC110Z EVO2" is not a part number.
  • What is the serial number of my machine? Kleemann changes revisions during production. The model name is only the start.
  • Does the drawing match the current factory drawing? If you can't get the factory drawing, ask someone who can. Most dealers will confirm a part number if you ask.
  • Who is the actual person selling this? A named person with a company domain and a physical address is much easier to verify than a chat window.
  • What happens if I'm wrong? Returning a $4,180 part is expensive. The return shipping alone can wipe out the price advantage.

I know that sounds like common sense. It is. But common sense is the first thing that disappears when a quarry manager is standing in your doorway and every quiet minute on site costs money.

One more thing: I didn't stop buying parts from online suppliers. That's not the point. The online parts market has genuinely evolved since 2015, and there are honest brokers who do great work. But the industry has also become easier for under-verified listings to hide. What was best practice in 2020 is not enough in 2025. The fundamentals—part number, serial number, dimensional check, human contact—haven't changed. They just have to be applied faster.

I dodged a bullet. I was trying to save $1,120, and I could have lost at least $15,000 in production and credibility. Rose, by the way, is fine. She doesn't like the Simparica chew, but she eats it eventually. The vet bill was cheaper than a wrong crusher part. And I bought her a new toy with some of the money I saved by not paying the wrong invoice. I figure she earned it.