McLanahan Quality Checklist: 7 Steps to Verify Your Mineral Processing Equipment Before Delivery

When I first started as a quality compliance manager at a mid-sized aggregates operation, I assumed the big names like McLanahan had every spec locked down from the factory floor. I was wrong. The surprise wasn't that their equipment was bad—it was that without a structured verification process on our end, small variances in things like screen tension or bearing alignment could slip through. Never expected a $2,000 detail to delay a $180,000 crusher installation by three weeks. Turns out, the factory wants you to catch these things before they ship. They just won't do your QC for you.

This checklist is for buyers or site supervisors responsible for accepting McLanahan equipment—whether it's a single screen deck or a full processing plant module. It covers seven concrete steps you can take during the pre-delivery inspection (often called Factory Acceptance Testing or FAT) or upon receipt at your site. It's not about theory. It's about what to look at, what to measure, and what to say when something's off.

Step 1: Verify the Model & Serial Number Match the PO (Don't Assume)

This sounds obvious, but I've seen it happen: a unit arrives, the paperwork says one model, and the physical tag says another. The difference? A McLanahan triple-deck screen might look similar across two model generations, but the bearing loads and stroke settings can be different.

What to do: Compare the serial number plate on the equipment against your purchase order and the factory test report. Take a photo of the plate. I keep a spreadsheet with these photos for every major asset. On our Q1 2024 audit, we found one unit where the serial number didn't match—turned out it was a different spec level. We rejected it on the spot.

Checkpoint: Model number, serial number, manufacturing date (month/year). If the unit is more than 18 months old from build date, ask about storage conditions and preservatives.

Step 2: Check Critical Dimensions (Not Just the Overall Footprint)

Most people measure the overall length and width—and that's it. But the critical dimension is often something else: the mounting hole pattern, the shaft centerline height, or the clearance for a discharge chute. I remember a $48,000 McLanahan rotary breaker that fit the footprint but had a discharge height 4 inches too low for our existing conveyor. That was a $12,000 field modification.

What to do: Get the dimensional drawing from the factory (usually included in the IOM manual). Measure:

• Mounting bolt pattern (center-to-center, hole diameter)
• Shaft centerline height from base
• Discharge opening dimensions
• Inlet flange dimensions
• Clearance for access doors or inspection hatches

Checkpoint: All dimensions within ±1/16" or per the tolerance specified on the drawing. If a dimension is off, decide: can you adapt your site, or does the unit need adjustment?

Step 3: Inspect Wear Surfaces & Liners (Where the Money Goes)

The liners inside a McLanahan crusher or wash box are what take the abuse. I have mixed feelings about factory-installed liners: they're convenient, but I've seen cases where the liner thickness varied by 15% across the same panel. The factory usually catches this, but not always.

What to do: If you can access the wear zones (often they're accessible before assembly), use a thickness gauge or calipers at 3-4 points per liner panel. Compare to the minimum specified thickness in the manual. Also check for proper fastener torque—loose liner bolts are a common issue that leads to premature wear and damage to the shell.

Checkpoint: Liner thickness within 90% of new spec. All bolts torqued to factory specification (usually listed in the IOM). No cracks or delamination on rubber or urethane liners.

Step 4: Run the Drive System (Dry Run, and Listen)

You can't always run the equipment under load during pre-delivery, but you can run the drive system. This is where I've caught issues. When I implemented our verification protocol in 2022, I made dry-run testing mandatory for all vibrating screens and crushers with hydraulic drives.

What to do:

1. Fill lubrication systems to proper level (check factory sticker).
2. Rotate the drive by hand first—should move freely without binding.
3. Run the motor briefly (10-15 seconds) to confirm rotation direction matches the arrow on the unit.
4. If possible, run for 2-3 minutes and listen for knock, chatter, or high-pitched whine.

Look, I'm not a mechanic, but I know that any consistent knock at 60 RPM is a bearing flag. If you hear something, mark the unit and ask for a re-inspection. Most factory reps will cooperate—they don't want a warranty claim later either.

Checkpoint: Smooth rotation in correct direction. No abnormal noise. Lubrication verified at sight glass or dipstick.

Step 5: Verify Safety Guards & LOTO Points (Don't Skip This)

This is the step that gets treated as an afterthought, but it's where regulatory risk lives. A McLanahan unit might ship with the guard hardware loose or missing if it was fitted during a rushed assembly. I recall reviewing a batch of 3 screens where one had a missing guard bolt—the guard was resting on the lockout bracket, not actually secured. That's a citation waiting to happen.

What to do: Physically check each guard. Does it require a tool to remove? Are the bolts present and tight? Verify lockout/tagout (LOTO) points: is the energy isolation point clearly marked and functional? For hydraulic systems, verify that the dump valve operates.

Checkpoint: All guards secured per OSHA or local standard. All LOTO points functional and labeled. No missing fasteners on safety components.

Step 6: Compare the Test Report to Real Performance (Beware 'Within Industry Standard')

In 2023, we received a McLanahan rotary breaker where the test report showed a capacity of 600 TPH. Our site conditions were different—higher moisture feed—but the factory still claimed it was "within industry standard." We tested it. It delivered 480 TPH. The discrepancy wasn't a defect; it was a spec issue based on assumed conditions. But we should have caught it on the front end.

What to do: Request the factory test report. Look for the test conditions: moisture content, feed size distribution, material type. Compare to your actual conditions. If your feed is more abrasive or has higher fines, expect lower throughput. If the report tests at 80 F and you're in a 40 F environment, ask about cold-weather performance considerations.

Checkpoint: Test report conditions documented. Realistic performance range agreed upon (not just peak theoretical). If the gap between test and expected is >10%, get it in writing before acceptance.

Step 7: Verify Documentation, Spares, & Software (The Paper Trail Matters)

Here's something I learned the hard way: a unit might be physically perfect, but if the IOM manual is missing three chapters or the PLC program is for the wrong revision, you're in trouble. Between you and me, most buyers skip this step until the first breakdown when they need a wiring diagram. Then it's too late.

What to do: Check the physical package:

• Installation, Operation & Maintenance (IOM) manual (check for your specific model and serial number)
• Electrical schematics (both PDF and hard copy if possible)
• Parts breakdown with exploded diagrams
• PLC program file (if applicable) and backup
• Warranty registration card (often overlooked; must be submitted within 30 days)
• Tool kit or special tools (check packing list)

If it's a larger system, verify that the software version matches the factory test setup. In our project with an advanced McLanahan wash plant, we found the HMI program was one revision behind what the tech had tested on. We got it corrected before installation.

Checkpoint: All documentation present and matches the unit. PLC/software version confirmed. Warranty registration initiated.

Final Note: When to Push Back

Not every discrepancy requires a rejection. Minor cosmetic issues—scratches, paint chips—are usually acceptable. But for anything that affects safety, fit, or performance, push back. Small doesn't mean unimportant. I rejected a $350 liner panel because it was the wrong thickness. The vendor redid it at their cost. That wasn't about being difficult—it was about preventing a $12,000 failure later.

If you're a small operation ordering your first McLanahan unit, don't be intimidated by the name. The same rules apply. Take this checklist, print it out, and go through it step by step. The factory rep might act like it's overkill. That's fine. Your plant, your risk.

"I'm not 100% sure of the exact acceptance rate, but I'd estimate that a thorough pre-delivery inspection catches 1-2 significant issues per 10 units. That's a lot of saved headaches for a few hours of careful checking."

One last thing: I mentioned checking prices? Not relevant here—McLanahan pricing varies by dealer and region. Focus on what you can control: the equipment quality when it arrives.

Good luck. And if you find something off, trust your eyes, not the paperwork.