Snow Plow Trip Spring

What Is a Snow Plow Trip Spring?

Trip springs are small coil springs attached to the moldboard of a snow plow, designed to control the movement of the blade when it hits an obstacle — such as a curb, manhole cover, or other obstructions hidden beneath the snow. While many components contribute to the overall performance of a snow plow, trip springs often go unnoticed, yet these small but mighty springs are responsible for providing the necessary flexibility, control, and protection to ensure a smooth and safe plowing experience.

How Do Trip Springs Work?

Blade tripping is defined as the rotational movement of an element of the snowplow blade system in reaction to impacting an obstacle. The purpose of a blade tripping system is to protect the snowplow and vehicle in the event of excessive force that could damage the snowplow or truck. When a blade trips, the plow springs back into its upright position — often with a loud bang — as the blade slams back into its plowing position, pulled by the same springs that controlled its forward trip.

On full-moldboard trip systems, extension springs are mounted between the push frame and center section, allowing the plow to trip forward and then contract to bring the blade back to the vertical position. Spring tension matters greatly — you want to get the trip edge dialed in so that your plow will carry snow, but not be so stiff that it damages property like manhole covers, parking blocks, or curbs.

Why Replacing Worn Trip Springs Matters

Trip springs are one of the most replaced items on a plow, whether it is a straight blade or v-plow. V-plow users will notice that as trip springs wear, they have the tendency to sag in "scoop" mode and trip much easier while windrowing in straight mode. Straight-blade users will notice their plow tripping at a much earlier rate over objects the plow would normally not trip over.

Snow plow operators often spend long hours clearing snow, and fatigue can set in. Trip springs play a crucial role in operator safety — when the plow's blade trips forward upon impact, it absorbs the shock and decreases the risk of sudden jarring or loss of control, contributing to a safer and more comfortable plowing experience.

By allowing the blade to glide over obstacles, trip springs prevent excessive scraping and dragging, resulting in a smoother plowing experience. This not only creates a cleaner finished surface but also helps preserve the integrity of the pavement and prevents unnecessary wear and tear on the plow blade.

What to Look for When Buying a Replacement Trip Spring

• Compatibility: Always match the spring to your specific plow model. Snow plow equipment varies by blade size, mounting geometry, trip mechanism design, operating speed, vehicle weight, and expected environment — a spring that works in one setup may fail early or perform poorly in another.
• Material durability: The best material depends on load requirements, fatigue expectations, and exposure to moisture, salt, and temperature extremes.
• Spring tension: Proper spring tension will prolong the life of the springs and ensure optimal tripping performance season after season.

Top Brands in Snow Plow Trip Springs

Warn is the leading name in this category, and for good reason. Warn Industries has led the way in durable, innovative, and trusted off-road products since 1948. The Warn 71494 Heavy Duty Spring Plow Blade Service Kit is a service replacement part that includes two heavy-duty springs and fasteners, compatible with all Warn plow blades. Whether you run an ATV, UTV, or truck-mounted plow system, Warn's trip spring replacements are engineered to restore full protective function to your setup.