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Get your free estimateMighty Mule Welding & Fabrication: The Henderson Owner’s Guide
We stock and install Mighty Mule-compatible welded gate frames, hinge plates, and mounting brackets across Henderson, with most fabrication repairs running $350 to $900 installed depending on the part and damage. Same-day dispatch is available when the part is in the truck, which it usually is for common Mighty Mule FM and MM series failures.
Here’s how owners typically find us: the gate starts sagging at the latch side, or a hinge tears loose from the post, or a weld cracks where the operator arm bolts to the frame. They open the cover, find a Mighty Mule control board still blinking away, and realize the electronics are fine. The steel gave out first. That’s what we fix. Lonnie Burke has been welding Mighty Mule hardware in the Henderson area long enough to know that most of these failures aren’t mysteries, they’re metallurgy plus weather plus time.
Which Mighty Mule Models This Applies To
We work on the full Mighty Mule line you’re likely to have in Henderson: the FM200, FM350, FM500, and FM502 swing gate openers, plus the MM series slide gate operators (MM260, MM360, MM362, MM462, MM562, MM572). The welding and fabrication work usually involves the parts Mighty Mule doesn’t sell you, namely the gate frame itself, the hinge hardware, and the mounting brackets that connect the operator to the steel.
Before we touch anything, we identify the model from the label on the control board or the arm housing. It matters because the FM350’s arm mount sits differently than the FM500’s, and the MM462 slide operator needs a different bracket profile than the MM260. The operator serial number tells us what generation you have, which changes the bracket spacing. A quick compatibility gotcha: Mighty Mule changed the FM-series arm geometry twice, and a bracket that fits a 2008 FM350 won’t fit a 2016 unit without modification. We flag that before cutting steel, not after.
On OEM versus aftermarket: Mighty Mule sells replacement arms and some bracket kits. For the fabricated parts themselves, like hinge plates and gate frames, there is no OEM option, that steel came from whatever gate installer built the gate. We weld with the same material weight and profile as the original frame, and when it makes sense we upgrade the problem spot rather than just patching it. Carver Gate Repair Henderson is an independent service provider, not affiliated with Mighty Mule, and we also stock parts for LiftMaster, Ghost Controls, and DoorKing gate systems.
Styles & brands we work with
Signs Your Mighty Mule Welding & Fabrication Is Failing
- The gate droops at the free end while the operator still opens it. A hinge plate or the post-side weld has stretched or cracked. The motor keeps working because it has enough travel, but every cycle widens the crack. Get it welded before the gate drops onto the operator arm and bends it.
- You hear a pop or ping when the gate starts moving. That’s a cracked weld flexing under load. It usually happens at a tube-to-tube joint or where the bracket ties the arm to the frame. The noise only gets louder as the crack propagates.
- The operator arm mounting bracket wiggles visibly. The bolts haven’t loosened, the steel around them has fatigued. Tightening the bolts buys days, not weeks. The bracket needs to come off and be rewelded or replaced with heavier stock.
- A hinge pin has wallowed out its hole. The gate still swings, but it doesn’t track straight through the operator’s range. The motor works harder, current draw climbs, and the control board heats up. That’s how a $40 hinge problem becomes a $400 board replacement.
- Rust streaks are running from a weld seam. The weld was never sealed or the powder coat has failed. In Henderson’s dry climate, rust moves slower than other places, but once it starts inside a weld seam it keeps working. The fix is grinding the seam and laying a proper bead, not spraying over it.
Replacement Cost & What’s Included
Typical installed pricing for Mighty Mule welding and fabrication in Henderson:
- Hinge plate or bracket rewelding: $350 to $600, depending on whether we’re repairing in place or removing the gate to the shop.
- New heavy-gauge gate frame section (single crack or sag repair): $500 to $900, including match-cut steel and powder coat primer.
- Operator mounting bracket fabrication: $300 to $550, sized to your specific Mighty Mule model and arm geometry.
- Full gate frame rebuild for severely rusted or twisted frames: $1,200 to $2,800, measured and quoted after we see the gate.
Every quote is written before any work starts. That’s the Garrison Standard, and it applies on every job we run in Henderson. The number does not move at the door. Each repair carries a written guarantee good for a full year, and if the repair fails inside that window, the second visit is free, no charge, no argument. If you’re watching a failed weld right now, call (775) 307-6571 and we’ll get an exact number to you before anything gets touched.
See the difference
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After
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AfterDIY or Call Us?
Here’s the honest split. You can safely check the operator itself: verify the arm is still bolted tight to its bracket, look for visible cracks at the weld seams, and listen for that popping noise I described above. You can also photograph the model label so you know exactly which Mighty Mule unit you have when you call us. None of that involves a welder.
What I would not do is attempt the welding yourself. Welding a gate frame that’s under tension, even partial tension from its own weight, is a different job than welding a table leg. If the gate is hung wrong when the weld cools, it pulls the bead apart or warps the frame. And any Mighty Mule operator that lifts or slides a gate has enough force to hurt someone if the bracket gives way mid-cycle. That’s not a sales line, it’s the same warning I gave my neighbor back in Southern California. If the steel is broken, call a welder who does this specific work. Call us at (775) 307-6571 and tell us what it’s doing wrong, and I’ll tell you what it needs, usually those are two different things.
FAQs
A properly welded bracket or hinge plate on a Mighty Mule gate in Henderson typically lasts 8 to 15 years, assuming the gate weight is within spec for the operator and the hinges stay greased. The original welds that came with the gate often fail because they were too shallow or the steel was undersized for the gate’s weight. When we repair, we match or upgrade the material so the next failure usually happens somewhere else, not at the same joint.
Yes, and that’s the first thing we look for. If the crack is at a single joint and the surrounding steel is still sound, we grind the old weld, lay a proper bead, and gusset the joint if it needs extra rigidity. If the frame has multiple cracks or the tubing has rusted thin from the inside, a repair will fail again within a year or two and a section rebuild is the honest recommendation. We’ll show you why before we weld anything. Call (775) 307-6571 for a written assessment.
A single bracket rewelding or hinge plate replacement typically takes two to four hours on site. If the gate needs to come back to the shop for frame work, plan on one to two days, and we’ll tell you that before we touch the gate. If the part is on the truck, which it is for most Mighty Mule FM and MM series hardware, we can often start the same day.
We stock the common bracket profiles and hinge plate sizes for FM200, FM350, FM500, FM502, and the MM slide series on the truck. If your gate needs a piece we don’t have, we fabricate it from the same gauge steel and profile as the original. Either way, you get a written price before any work starts, and the repair carries the same full-year written guarantee.
Call Carver Gate Repair Henderson
If your Mighty Mule gate is sagging, popping, or tearing loose at the hinges, call (775) 307-6571. You’ll get a live person, not a voicemail box, any hour of the day. We’ll take the model number, listen to what the gate is doing, and give you a straight answer on what it likely costs to fix. Every job gets a written price before work starts, a background-checked and uniformed technician on site, and a written guarantee good for a full year. That’s how we run every gate repair in Henderson.
Written by Lonnie Burke, Owner, Carver Gate Repair Henderson at Carver Gate Repair Henderson, serving Henderson and nearby areas.