Mighty Mule Welding & Fabrication Nationwide | Gatewood Fence & Gate

Mighty Mule Welding & Fabrication: The Arlington Owner’s Guide

We stock, weld, and install Mighty Mule-compatible gate hardware and fabrication work across Arlington, and most hinge post rebuilds, gate frame repairs, and bracket reinforcement jobs run between $180 and $450 installed, with same day or next day availability for most repair calls. The part itself is only half the story: a Mighty Mule opener pushes a gate through the hinge post and frame, and when one of those gives out, the opener gets blamed for what was really a metal fatigue problem. We see it all the time in Arlington neighborhoods like Pantego, Dalworthington Gardens, and the older streets off Park Row: a gate that still opens fine but sags two inches at the latch, a weld that cracked at the bottom corner, and an opener that’s now working twice as hard as it should.

Call (817) 241-4067

Key Takeaways

• Most Mighty Mule “motor failures” in Arlington are actually broken welds or bent hinge posts.
• We weld on site, at your driveway, so the gate never leaves your property.
• Installed welding and fabrication work on Mighty Mule gates typically runs $180 to $450, quoted and agreed before we touch anything.
• Hal Gatewood has been fixing gates since 2001, and his name is on every invoice.
• Every job carries the 90-Day Done Right Promise, in writing.

One thing to get out of the way: Gatewood Fence & Gate is an independent, locally owned shop. We are not affiliated with Mighty Mule, but we have been servicing and fabricating for their openers since the old days when the MM360 and MM560 were the only models on the shelf at the feed store. We know how their brackets mount, how their arm geometry works, and what breaks first when a Texas summer works on a gate for six or eight years.

Which Mighty Mule Models This Applies To

Over the years, Mighty Mule has sold a lot of different opener lines under a few different series names. The parts and fabrication work we do cover the full range we still see on gates in Arlington: the older FM series (FM350, FM700, FM702), the MM series (MM360, MM500, MM560, MM571, MM572), the RB series, and the current Mighty Mule Smart Gate openers that run off the app. The welding and fabrication side is less about the specific opener model and more about the gate itself: the hinge post, the gate frame, the opener bracket, and the point where the arm attaches to the gate. That said, there are some real differences. The older FM and MM single-arm openers put a lot of torque on the gate bracket, and we routinely see the original bracket bolts pulled through or the bracket itself torn off the frame. The dual-arm models are easier on the frame but harder on the hinge post, because they push and pull instead of just pushing.

If you are trying to figure out whether we can match what you have, take a look at the metal bracket where the actuator arm bolts to the gate. There is usually a stamped part number or at least a model series number on the opener control box. If you cannot find it, we can identify it in person. On the OEM versus aftermarket question: Mighty Mule sells replacement brackets and gate hardware, and for most of the newer Smart Gate series, we will use the OEM part when it is available and priced fairly. For the older FM and MM series, a lot of those parts are discontinued, and that is where our fabrication work comes in. Hal has made replacement hinge brackets, reinforcement plates, and full gate frames for Mighty Mule gates that are older than some of the technicians who work for other companies. We do not weld on a cheap aftermarket bracket just because it is what the parts house had in stock. If the right part does not exist, we make it.

Signs Your Mighty Mule Welding & Fabrication Is Failing

• The gate sags at the far end, but the opener still runs. This is almost always the hinge post moving or the hinge welds cracking. The opener is not designed to carry the weight of a sagging gate, and every cycle is pulling on the hinge welds a little harder. What started as a cosmetic sag turns into a full structural failure if it is not addressed.
• A crack in the gate frame near the bottom corner, usually on the opener side. Mighty Mule arms push and pull at the bottom third of the gate, and a standard residential tube gate was never designed for that repeated point load. We see stress cracks at the lower corner weld on gates that have been automated for five years or more. Arlington’s freeze-thaw cycles do not help; water gets in a small crack, freezes, and opens it up.
• The opener bracket is loose, wallowed out, or twisted. The bracket bolts might be tight, but if the holes in the gate frame are now oval-shaped, the bracket is moving every time the opener cycles. That slop eats up the opener gears and wallows the holes out further. It is a compounding problem.
• The gate seems to jump or stutter halfway through its travel. That is usually a hinge that has worn or a weld that has started to flex under load. The opener is hitting a physical resistance point, and the motor does not know the difference between a rock and a broken weld; it just pushes harder.
• Rust staining running down the gate or post, especially at weld joints. In Arlington’s humidity, a weld that was not prepped or primed properly starts to bleed rust within a couple of years. The rust is a sign the weld is failing underneath, not just a cosmetic issue.

None of these symptoms fix themselves. We have had customers in Arlington call us after a gate collapsed onto a car, and the truth is they usually saw at least two of these signs a year earlier. We would rather come out and find a loose bracket than weld a gate frame back together in the middle of a rainstorm, and we think you would too.

Replacement Cost & What’s Included

For the fabrication and welding work we do on Mighty Mule gates in Arlington, here is what you are looking at, installed:

• Hinge post repair or reinforcement: $180 to $320, depending on post size and how much material has to be cut out and replaced.
• Gate frame crack repair (single corner or joint): $150 to $240, including grinding, welding, and a rust-inhibiting primer coat.
• Opener bracket replacement or reinforcement, including fabrication if needed: $120 to $300, depending on whether we use an OEM bracket or fabricate a custom plate.
• Full gate frame weld repair and alignment: $250 to $450 for a standard single gate, including realignment of the hinges and resetting the opener arm.
• Custom fabrication, like a new gate extension or a complete hinge post rebuild: quoted on site, but typically $350 and up depending on materials and what the existing concrete looks like.

The price is quoted and agreed before any work starts. That is not a maybe; that is how we have done it since 2001. You will know exactly what you are paying before Hal or one of his crew begins welding, and if the scope changes, you will know that too, in advance, in writing. Every welding and fabrication job carries the 90-Day Done Right Promise. If it is not done right, one call brings us back to make it right. No runaround.

DIY or Call Us?

There are things you can check yourself before calling, and things you should not touch. You can check the bolts on the opener bracket to see if they are loose, and you can look for visible cracks in the gate frame and rust stains at the welds. What you should not do is attempt to weld a cracked gate frame or a moving hinge post if you are not a trained welder. Welding on a gate that is under tension, or on a post that has shifted, can snap back or fail while you are on a ladder, and a gate that weighs a few hundred pounds is not something you want to catch with your body. There is also the electrical side: a Mighty Mule opener is a 12V DC system with a battery and control board, and working around energized components while welding is a real risk if you do not know how to isolate the system properly. We see a lot of well-intentioned homeowner welds in Arlington that lasted six months and then broke worse than the original crack. Save yourself the second repair and call us at (817) 241-4067. Hal will look at it, tell you what it really needs, and give you a price before any work starts.

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