5 Step Quality Verification Checklist for McLanahan Equipment Procurements

If you're ordering replacement parts or new equipment for a mineral processing setup, you've probably got a spec sheet in front of you and a PO ready to send. Good. But here's the thing: I review roughly 200+ equipment orders annually for our operation, and I'd say maybe 30% of first-time orders have some kind of spec mismatch. It's rarely intentional—it's almost always a process gap. This checklist is for anyone about to place an order for McLanahan equipment, whether it's a crusher component, a screen deck, or a complete wash plant module. Five steps. Do them in order. Skip one, and you're gambling.

Step 1: Verify the Part Number Against Your Actual Machine

This sounds obvious, but you'd be surprised. The third time we ordered the wrong crusher jaw, I finally created a verification checklist. Should have done it after the first time.

People assume the part number on the drawing matches the machine's serial number. The reality is that McLanahan often updates components mid-production run. A machine built in 2022 might have a different part number for the same component than a 2024 model.

What to do:

• Locate the machine's serial plate. It's usually on the main frame.
• Cross-reference the part number from your drawing against McLanahan's current catalog using that serial number.
• If the numbers don't match, don't assume the drawing is wrong. Call your distributor or McLanahan directly.

I've seen a $4,000 component order become a $22,000 redo because someone used a drawing from 2019 for a 2023 machine. The mounting bracket was slightly different. It wasn't even close to fitting.

Step 2: Review Material Specifications for Your Specific Application

McLanahan builds equipment for a range of materials: coal, aggregates, sand, heavy minerals. The same model of crusher or screen might be built with different alloys or wear-resistant linings depending on the intended feed.

From the outside, it looks like a standard part is a standard part. The reality is that a manganese jaw designed for granite won't perform the same in a copper ore application. The wear rate could be 3x higher.

Check these specifics:

• Feed material type and abrasiveness (e.g., silica content)
• Expected throughput in tons per hour (TPH)
• Moisture content (affects screen efficiency and wear)

In our Q1 2024 quality audit, we rejected a batch of 12 screen panels because the vendor had supplied standard polyurethane. Our application was a high-impact primary screen with 15% moisture. The standard panels would have cracked within a week. The correct spec was an impact-resistant urethane blend.

Step 3: Confirm Dimensional Tolerances and Connections

This is the step that gets skipped the most. People look at the overall dimensions—length, width, height—and assume the bolt patterns and flange connections are standard.

What to verify:

• Bolt hole pattern and diameter. A metric pattern versus imperial is an immediate mismatch.
• Flange thickness and facing.
• Pulley or sprocket bore size, keyway dimensions, and tolerance class.

Saved $200 by skipping tolerance verification on a $1,500 drive shaft. Ended up spending $800 on rush machining and a downtime penalty when the shaft didn't fit the existing bushing. The bore was 0.005 inches overspec'd. Net loss: $600 plus three days of downtime.

Industry standard for shaft-to-bushing fit is typically H7/h6 for slip fits or H7/k6 for light press fits. Verify against your machine's manual. Don't assume.

Step 4: Understand the Total Cost of Ownership (TCO) for Replacement Parts

The $500 quote from one vendor looks cheaper than the $650 quote from another. But when you calculate TCO, the picture changes. People assume the lowest quote means the vendor is more efficient. What they don't see is which costs are being hidden or deferred.

TCO for a McLanahan component includes:

• Unit price
• Shipping and handling (especially for heavy components—freight can be 10-20% of the cost)
• Expected service life in your specific application
• Downtime cost for installation
• Risk of early failure (warranty coverage)

Let me rephrase that: a cheaper part that fails in 6 months versus a premium part lasting 18 months is actually more expensive per month of operation. I now calculate TCO before comparing any vendor quotes. The $650 all-inclusive quote was actually cheaper over 24 months than the $500 quote with no warranty and unknown alloy.

According to industry data (Source: Society for Mining, Metallurgy & Exploration, 2023), the cost of unplanned downtime in mineral processing averages $5,000-$10,000 per hour. A cheap part that fails is no bargain.

Step 5: Establish a Formal Verification Process

We didn't have a formal verification process for incoming equipment orders. Cost us when an unauthorized expedite fee showed up on the invoice because someone didn't check the lead time before ordering.

Build a simple checklist process:

1. Pre-order review: Compare part number, material spec, and dimensions against your machine's serial number.
2. Order confirmation check: When the vendor sends the confirmation, verify every line item matches your PO. Don't just glance.
3. Incoming inspection: Physically check the part against the spec when it arrives. Measure bolt holes. Check alloy markings. This takes 15 minutes and saves thousands.

The list price for a high-quality quality audit process is basically zero—it's just procedure. The cost of not having one is a $22,000 redo, a delay in your project, or a safety incident. The choice is clear.

Final Notes & Common Mistakes

Don't assume the vendor checked everything. They're busy. They process hundreds of orders. Your job is to protect your operation.

Don't skip Step 3. Dimensional tolerances are where most mismatches live. Measure twice, order once.

Don't order based on price alone. TCO is the only metric that matters for equipment that stops your plant if it fails.

Don't forget to update your internal drawings. If McLanahan revises a part number, update your records. Next year's order will thank you.

Prices as of late 2024; verify current rates with your distributor. This checklist is based on my own experience reviewing equipment orders. Your specific requirements may vary—consult your machine's manual and McLanahan representatives for exact specs.