Plowing snow is demanding work that requires full attention. You have to watch the road surface, keep an eye on obstacles, and manage your truck’s controls all at once. The last thing you need is a wall of white powder blowing back onto your windshield and blinding you.
This is where a simple but essential piece of equipment comes into play. If you want to keep your windshield clear and your stress levels down, you need to understand what a plow deflector is and why it’s important.
Controlling the Snow Curl
The primary function of a plow deflector involves physics. As you push forward, the snow gathers on the moldboard. Ideally, the curve of the plow rolls the snow forward and off to the side. However, wind and speed often interfere with this process. Without a barrier at the top of the blade, the momentum of the snow carries it upward, where the wind catches it and throws it directly back at the vehicle.
A deflector acts as a shield. It extends the moldboard height and alters airflow. When the snow travels up the plow face, it hits the deflector. This forces the material back down into the rolling wave of snow, keeping it contained within the curl.
Why Visibility Equals Safety
Safety is the most practical reason to install a deflector. Operating a heavy truck with a plow attached is dangerous enough when conditions are clear. When you add a whiteout condition caused by your own equipment, the risk of an accident increases dramatically.
Reducing the Blind Spots
Windshield wipers struggle to keep up with heavy blowback. The heat from your defroster might melt the bottom layer, but the sheer volume of snow hitting the glass can create a slushy mess that refreezes quickly. This creates blind spots. By keeping the snow off the glass in the first place, a deflector gives you a fighting chance to see hazards before you hit them.
Improving Lighting Efficiency
Your headlights and plow lights are only effective if the beam can cut through the darkness. When loose snow flies up in front of the lights, it reflects the glare at you. This is similar to using high beams in fog; you end up seeing a wall of white rather than the road ahead. A deflector keeps that area in front of the hood clear, allowing your lights to illuminate the path effectively.
Protecting Your Truck Components
While driver safety is the top priority, equipment longevity is a close second. Your truck takes a beating during the winter, and salt spray combined with road slush is a recipe for corrosion.
Saving the Windshield and Wipers
Heavy, wet snow hitting your windshield at 30 miles per hour puts immense strain on your wiper motor and linkage. Over time, this stress causes mechanical failure, usually right in the middle of a job. Additionally, ice chunks mixed in with the snow can crack the windshield. A rubber or poly deflector absorbs that impact at the blade level, sparing your glass and wiper mechanics from unnecessary wear.
Keeping the Grille Clear
Snow that blows over the plow usually lands on the hood and packs into the grille. This blocks airflow to the radiator. While engines usually run cool in winter, blocking the intake entirely can cause overheating if you are pushing heavy loads. More importantly, that slush is often filled with road salt.
When it packs into the engine bay, it accelerates rust on sensitive electrical connections, the radiator core, and other under-the-hood components. Keeping the snow forward helps keep the engine bay cleaner and drier.
Choosing Between Rubber and Poly Deflectors
You will generally find two main material options when shopping for these parts. Understanding the difference helps you choose the right one for your specific setup.
The Case for Rubber
Rubber deflectors are the traditional choice and remain very popular. They are made from thick, belted rubber that is incredibly durable. The material is flexible, which is a major advantage when plowing in areas with low-hanging branches or obstacles. If a rubber deflector hits something, it simply flexes and snaps back into place.
They provide a lot of weight at the top of the blade, which can help dig into hardpack, but their primary benefit is their resilience. They handle extreme cold well without becoming brittle.
The Case for Poly
Polyethene or poly deflectors are rigid. They are made from a high-density plastic that is slicker than rubber. This slickness helps snow slide off quickly rather than sticking to the material. If you deal with very wet, sticky snow, poly helps keep the curl moving efficiently.
Because they are rigid, they hold their shape against strong winds better than rubber. They create a firm barrier that forces snow down aggressively. However, because they don’t flex as much, they can be more prone to cracking if you slam them into a hard obstacle in freezing temperatures.
Installation and Maintenance
Most deflectors are designed to be universal or easily adaptable to specific plow brands. Installation is usually straightforward and involves bolting the material into the pre-drilled holes on the top of your plow blade.
You generally sandwich the deflector material between a metal strip and the plow blade to evenly distribute the pressure. This prevents the bolts from tearing through the rubber or cracking the poly. It is a job that requires basic hand tools and perhaps an extra set of hands to hold the material straight while you tighten the hardware.
You should also check the bolts periodically throughout the season. The vibration of the plow scraping against the pavement can loosen hardware over time.
Making the Right Investment
The cost of a deflector is small compared to the price of the plow or the truck. When you weigh the low cost against the benefits of safety and equipment protection, it becomes one of the best-value upgrades you can make.
Visibility is the key to a successful winter season. Don’t wait until you are in the middle of a blizzard to wish you had better equipment! Now that you know what a plow deflector is and why it’s important, you can make sure your truck is ready to handle whatever the weather throws your way.
Ready to tackle the snow with an effective and reliable upgrade? Mill Supply provides durable and resilient parts for snow plow equipment, ensuring your plow performs at its best all season long. Don’t let winter slow you down. Equip yourself with quality parts built to last!
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