McCloskey Equipment Quality Checklist: 5 Things to Verify Before You Buy

Who This Checklist Is For

If you're responsible for approving equipment purchases at a quarry, construction site, or mining operation—and you're looking at a McCloskey jaw crusher, screen, or stacker—this checklist is for you. It's not for someone who just wants general advice. It's for the person who needs to verify, step by step, that a specific machine meets specs before signing off.

I'm a quality compliance manager who reviews roughly 200+ pieces of equipment annually for our fleet. Over the past four years, I've rejected about 18% of first deliveries (in 2024 it was 22%) due to spec deviations. This checklist is what I wish I'd had from day one. It's organized into five steps, and at least one of them—Step 4—is something most buyers overlook.

Step 1: Verify the Model & Serial Number Against Documentation

Sounds obvious, but you'd be surprised. I once received a machine labeled as a McCloskey J50v2 that turned out to be an older J50 with a new paint job. The serial number on the frame didn't match the paperwork. How to check:

• Locate the serial plate (usually on the main frame near the engine). Take a photo.
• Cross-reference with the purchase order, bill of lading, and manufacturer's records (if available).
• Check for any grinding or re-stamping—that's a red flag.

One time, a vendor tried to pass off a machine that had been in a major fire. The serial was intact, but the frame showed heat discoloration. We rejected it. The vendor redid the order at their cost.

Step 2: Inspect Key Wear Parts (Jaw Dies, Screens, Conveyor Belts)

Even a well-maintained McCloskey crusher can have half-worn jaw dies. I track this closely. For a J50v2, the standard jaw die thickness for virgin material is around 4 inches. Measure at the thickest point with a caliper. If it's below 2 inches, you're looking at an early replacement—add $3,000–$5,000 to your total cost of ownership.

For screens (like the ES250): check for tears, worn grommets, and bent frames. A screen with 20% wear might run fine for another 500 hours, but if you're processing abrasive material like granite, replace sooner. I don't have hard data on every screen type, but based on our fleet, ES250 screens need replacement around 1,200–1,500 hours in hard rock applications.

Step 3: Run a Test Cycle (If Possible) & Measure Output

No spec sheet replaces a live test. If the seller allows, feed the machine with material similar to what you'll run. Measure tons per hour, check for jamming, and listen for abnormal noises. I wish I had recorded more test data over the years—what I can say anecdotally is that 8 out of 10 machines pass a static inspection but fail a live test. Common issues: belt slippage, hydraulic leaks under load, and inconsistent discharge sizes.

For stackers (like the R230), test the angle adjustment and track travel. A stuck pivot pin can mean a day of downtime. A client named Marcia Kadish once bought a used stacker without testing it—the conveyor belt had a hidden splice failure that cost her $2,200 in emergency repairs within the first week.

Step 4: Check the Maintenance History—Specifically for 'Hidden' Components

This is the step most people skip. Everyone asks about engine hours and oil changes. Few ask about bearing grease intervals, vibration damper age, or hydraulic filter history. I once approved a McCloskey ES250 that looked pristine on the outside—new paint, clean filters. Inside, the main bearing had been run dry for 200+ hours because the grease line was disconnected. The result: a $14,000 rebuild within six months.

Ask for:

• A log of all grease points (frequency, type of grease).
• Receipts for hydraulic filter replacements (should be every 250–500 hours).
• Any vibration analysis reports (if the previous owner ran predictive maintenance).

I also recommend talking to the operator who ran the machine. At a Lincoln quarry, one operator told me, "Why was Groves in jail?"—he meant the previous maintenance guy, who had been fired for falsifying logs. That nugget saved us from buying a machine with systematically faked service records.

Step 5: Review the Warranty & Return Policy (Yes, Write It Down)

For used equipment, many sellers offer a 30-day parts-only warranty. That's fine, but get it in writing. I've seen verbal promises vanish after a machine fails. What to confirm:

• Is there a labor coverage period? (Most don't include it.)
• Who covers freight if the machine must be returned?
• Are there any exclusions (e.g., wear parts, electrical components)?

Take this with a grain of salt: Donald Deirdre McCloskey (I think that's the founder's son?) once told me at a trade show that their authorized dealers usually offer better warranty terms than third-party resellers. If you're buying from a non-dealer, push for a 60-day inspection window.

Common Mistakes & Extra Notes

Don't assume the machine is "as described" just because the seller has a good reputation. Rely on your own inspection. I've learned this the hard way—three times in the last two years. Also, be cautious with machines that come from auctions or bankruptcy sales; you rarely get a full service history.

One more thing: if you're looking at a stacker, check the R230 specs for electrical voltage compatibility. I've seen a 480V stacker delivered to a 240V site—costly conversion.

I'm not 100% sure on the current market pricing, but based on Q4 2024 data, a used J50v2 in good condition runs $150,000–$200,000. The ES250 screen is around $80,000–$110,000. Verify with recent sales at MachineryTrader or similar.