Snow Plow Repair: What Actually Breaks — and How We Fix It

A snow plow has one of the hardest jobs of anything bolted to a truck. It gets slammed into frozen banks, tripped over manhole covers, dragged across gravel at 30 mph, soaked in salt brine for four months, and then parked in the weeds until Thanksgiving. When something gives, it’s rarely a mystery — most snow plow repair comes down to a short list of parts that take the abuse. This page walks through that list, what each failure looks like, and what fixing it actually involves at our shop in Ames.

One note before the list: we’re writing this in summer on purpose. Every one of these failures is cheaper, faster, and calmer to fix in July than in January. The first blizzard is the worst day of the year to find out your plow is down.

Snow Plow Repair, Failure by Failure

Cracked A-Frames and Moldboards

The A-frame carries every pound of force the blade generates, and moldboards flex thousands of times a season. Cracks start small — usually at a weld toe, a gusset, or a rib — and grow every time the plow trips or stacks. Fixing them right is welding work first: we grind or gouge the crack out to clean metal, weld it full depth, and reinforce with a fishplate or gusset where the design was thin to begin with. A crack that gets a quick surface bead without prep just comes back. Structural plow work runs through the same bay as our welding and fabrication service, so the repair is built to take the load again, not just look closed.

Trip Springs and Trip Edges

Trip springs are what let the blade fold over an obstacle instead of transferring the hit into your truck frame — and into your teeth. Stretched, mismatched, or broken springs mean the blade trips too easily and dumps snow, or doesn’t trip at all. The fix is straightforward but matters in the details: replace springs in matched sets so tension is even across the blade, free up or replace seized trip pivots, and check that the trip edge or moldboard returns square. If the plow has been slamming for a season, we also look for the cracks that slamming leaves behind. Springs are cheap; the snow plow repair they prevent is not.

Pivot Pins and Bushings

Grab your blade and shake it. If it clunks, you’ve got wear in the center pin, quadrant, or pivot bushings. A little slop becomes a lot fast, because every impact hammers the loose joint bigger. Proper plow repair here means new pins and bushings — and when the holes themselves are wallowed out egg-shaped, we bore or sleeve them back to size instead of just dropping an oversized pin into a sloppy hole. Tight pivots make the whole plow feel ten years younger.

Cutting Edges

The cutting edge is a wear item, but running it too long is the expensive mistake. Once the edge wears down to the moldboard or trip edge, you’re grinding away the part that isn’t meant to be sacrificial — and the base of a moldboard is a much bigger fix than a bolt-on edge. We stock and swap steel edges, check for uneven wear (which usually points to a bent A-frame or a truck-side height problem), and replace stretched or rusted hardware while it still comes apart with a wrench instead of a torch.

Mounts and Pushframes

Truck-side mounts and pushframes take the hit when a driver finds a curb at speed. Bent receivers make the plow hard to hook up; elongated pin holes let the blade wander; cracked mount plates can let go entirely. This is classic plow frame repair: we straighten what can be straightened, cut out and replace what can’t, and reinforce the known weak spots so the same hit doesn’t fold it twice. If your plow has gotten hard to attach, the mount is where we look first.

The Hydraulic Side

Roughly half of all snow plow repair is hydraulic — pumps that won’t build pressure, blades that drop overnight, angle cylinders that creep. That side of the work is big enough that it gets its own page: see snow plow hydraulic repair for pumps, cylinders, valves, and fluid problems. If you tell us “it won’t lift,” we’ll figure out which half of the plow is lying to you.

Maintenance That Prevents the Big Bills

Most of the wrecked plows we see didn’t die from one storm — they died from deferred snow plow maintenance. The cheap habits that keep you off our emergency list:

• Change the hydraulic fluid every season; moisture in the system freezes at the worst time
• Grease every pivot and check trip springs before and after the season
• Store the plow on pallets with the cylinders collapsed, not rod-out in the rain
• Coat bare steel before summer storage — salt keeps eating all year
• Torque the mount hardware and look at every weld once a year, in good light

Ten minutes with a grease gun in August beats an emergency snow plow repair bill in December.

Where the Work Gets Done

Ames Hydraulics is an independent shop at 210 Freel Dr, Ames, IA 50010, open Mon–Fri 7AM–5PM. We work on every brand — Western, Boss, Meyer, Fisher, SnowEx, SnowDogg, Hiniker, and the old iron nobody claims anymore. Brand-specific quirks like Western’s UltraMount system get their own treatment — see our Western snow plow repair page for that.

Free pickup and delivery within 60 miles means your plow can get fixed without your truck going anywhere: set it on a pallet, and we’ll do the rest. Text photos or a short video to 515-292-2599 and we’ll quote most snow plow repair before you ever load it up. Off-season slots are open now — get it on the bench while the fix is still on your schedule, not the weather’s.