Stop rocks before they wreck your combine.
One stone through the feeder house can mean thousands in repairs and days of harvest downtime at the worst possible time. The MacDon Rock Dam Pro (MCDPRO) is a bolt-on rock guard that mounts directly to your header and catches field rocks before they ever reach your combine's intake — while letting crop feed through smoothly.
Built for prairie harvest conditions
Designed by Trueline Manufacturing and proven on Saskatchewan and Alberta farms, the Rock Dam Pro handles the crops we actually grow here: canola, wheat, barley, pulses, and soybeans. Its laser-cut, weather-resistant construction stands up to season after season of rocks, dust, and long harvest days.
Fits your header
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MacDon headers — all draper models
- Mounts using existing bolts where possible; self-tapping bolts included for other headers
- Installs in minutes, not hours — bolt it on and get back to the field
How it works
The Rock Dam Pro sits directly in front of the center canvas. Its welded fins catch rocks lifted by the cutterbar and vibrate them off the header — while dirt and fine material pass through. Crop flow stays smooth with no feeding restrictions, so you keep your ground speed and your grain sample.
Why farmers buy it
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Prevents feeder house damage — rocks never reach the drums
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Zero feeding issues — engineered for uninterrupted crop flow
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Quick installation — simple bolt-on setup, no drilling on most headers
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Durable — weather-resistant materials built for prairie conditions
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In stock in Saskatoon — no waiting on cross-border shipping mid-harvest
SKU: MCDPRO | Ships from: Saskatoon, SK | Questions? Call Agri-Auto Parts and we'll confirm fitment for your exact header model before you order.
Frequently asked questions
Will the Rock Dam Pro fit my header?
It fits all MacDon draper headers and all John Deere grain headers. If you run an unusual model, contact us with your header model and we'll confirm fitment before you buy.
Does it slow down crop feeding?
No. The Rock Dam Pro is engineered so crop flows through without restriction — rocks are caught and vibrated off while grain and straw keep moving.
How long does installation take?
Most headers take under an hour. It uses existing bolts where possible, and self-tapping bolts are included for other headers.
What's the difference between the Rock Dam and the Rock Dam Pro?
The Rock Dam Pro is the flagship version with welded fins that catch rocks while letting dirt pass through, instead of a solid ridge that can accumulate dirt.
Do you ship outside Saskatchewan?
Yes — we ship across the prairies and Canada-wide from our Saskatoon warehouse.
