Brush Hog Repair & Rotary Cutter Service in Ames, Iowa

A rotary cutter is the most abused implement on the place, and everybody knows it. It gets run through grass tall enough to hide a T-post, bounced off stumps, and parked outside year-round — and then it’s expected to spin a set of blades at full PTO speed without complaint. When it starts shaking, screaming, or leaving strips, that’s when we get the call. Brush hog repair is steady work at Ames Hydraulics because the cutter is where three of our trades meet: gearboxes and drivelines, structural welding, and the kind of wear parts that just need doing right.

We work on cutters for acreage owners keeping ten acres civilized, farmers mowing waterways and pasture, and the contractors who mow road ditches all summer for a living. Single-spindle five-footers to batwings — trailer it in, or we pick up free within 60 miles of Ames.

Blades, Bolts, and Stump Jumpers

Dull, rounded-off blades don’t cut — they beat the grass over and tear power out of the tractor doing it. Bush hog blade replacement is the most common ticket we write on these: new blades hung in matched pairs so the cutter stays in balance, new blade bolts because a worn bolt is how a blade leaves the deck at highway speed, and a hard look at the stump jumper while we’re under there. The jumper — the round carrier the blades bolt to — dishes, cracks, and wears its blade holes oval on hard-used cutters, and a sloppy jumper will shake a machine apart from the bottom up. We weld, rebuild, or replace it while the blades are off.

Spindles and Gearboxes

A howl or a wobble from the center of the deck means spindle bearings on their way out, and they never fix themselves. We pull spindles, replace bearings and seals, and true things back up before the wobble eggs out the housing. The gearbox up top tells on itself too — oil weeping down the deck, or a whine under load. We reseal leaking boxes, go through bearings and shafts, and get the oil right. A gearbox that runs low doesn’t fail gently, so this is the cheap end of brush hog repair — the expensive end is the same box six months later.

Slip Clutches and Shear Bolts

The slip clutch has one job: give, so the gearbox and driveline don’t. They fail in both directions. A clutch that slips constantly is glazed or worn out and burns instead of mowing; a clutch that’s rusted solid — the usual result of outdoor storage — passes every stump hit straight into the gearbox at full force. We handle slip clutch adjustment the right way, reface or replace the friction discs, free up seized stacks, and set them so they hold for mowing and give for impact. Getting the clutch right is the brush hog repair that pays for itself the first time you find something solid in tall grass. Shear-bolt cutters get the same attention: correct-grade bolts, not whatever was in the coffee can.

Deck Cracks and Mower Deck Welding

Decks crack where the loads concentrate — around the gearbox mount, at the hitch and clevis, and along the skirt where the deck flexes over rough ground. A bead run over the crack will open right back up, which is why our mower deck welding starts with finding the end of the crack, prepping the joint, welding it out, and backing it with reinforcement plate so the flex spreads instead of concentrating. It’s the same structural standard as the rest of our welding and fabrication work: the repair carries the load the steel was supposed to. Deck welding is the structural side of brush hog repair — the part a parts counter can’t sell you.

Drivelines and Tail Wheels

The PTO shaft takes a beating between the tractor and the cutter — worn U-joints and crosses, sloppy yokes, shields cracked or missing, and shafts that have been run at angles they were never meant to hold. We rebuild driveline joints and get shielding back where it belongs. At the other end, tail wheel forks bend and their bushings wear until the wheel shimmies; we rebush, straighten, and reinforce them so the deck rides steady instead of porpoising through the field.

Brush Hog Repair Before the Season Buries You

The smart time for this work is when the grass isn’t growing. A cutter that comes in over winter gets gone through completely — blades, jumper, spindles, gearbox, clutch, deck, driveline — and goes back to the shed ready for a full season. For roadside mowing contractors that timing is money: losing a cutter in July means losing contract miles you can’t mow twice. In-season breakdowns still jump our line, because we know what a down machine costs — but February brush hog repair beats June brush hog repair every single time.

Bring It In or We’ll Come Get It

Rotary cutters are one branch of the attachment repair work we do, and if the tractor in front of the cutter needs work, one shop handles both. Text photos of the damage to 515-292-2599 for a same-day ballpark, drop it at 210 Freel Dr, Ames, IA 50010 Monday–Friday 7AM–5PM, or have us pick it up free within 60 miles. If your cutter shakes, screams, leaks, or leaves strips, that’s rotary cutter repair we do all season long — call or text 515-292-2599.