FAAC Welding & Fabrication Nationwide

FAAC Welding & Fabrication: The Sunnyvale Owner’s Guide

FAAC welding and fabrication repair in Sunnyvale typically runs $340-$780 installed, depending on whether we’re reinforcing an existing FAAC gate arm bracket or fabricating a custom mounting plate for a 402 or 770 series operator. We stock FAAC-compatible steel stock and bracket hardware on our Sunnyvale service van, and most fabrication jobs are completed in a single visit. Most homeowners realize something’s wrong when the gate arm starts chattering against a loose bracket or when the mounting welds crack after years of vibration from daily open-close cycles.

Call (669) 900-1904

Which FAAC Models This Applies To

FAAC operators mount differently across their product lines, and the welding or fabrication work depends entirely on which series is bolted to your Sunnyvale gate. The 402 series (hydraulic swing gate, common on residential driveways around Lakewood Village) uses a cast aluminum bracket that often fatigues where it meets the gate post; we typically fabricate a steel reinforcement plate rather than replace the entire OEM bracket assembly. The 770 series (underground articulated arm) hides its mounting hardware below grade, so corrosion on the weldment usually shows up as slop in the arm before the motor itself fails. The 746 ER Z16 and 844 ER sliding gate operators use heavier post-mounted weldments that can shear their mounting bolts if the gate track settles even half an inch.

To identify your FAAC model, check the silver data label on the motor housing, not the remote or keypad. The part number format is usually three digits followed by a series suffix. For bracket work, we need the gate post material (steel, aluminum, or masonry) and the arm reach measurement, since FAAC OEM brackets are sized in 50mm increments and aftermarket equivalents sometimes skip the half-size. We source FAAC-compatible steel stock and certified weld hardware; we’re an independent service provider with no affiliation to FAAC S.p.A.

Signs Your FAAC Welding & Fabrication Is Failing

• Arm chatter or bounce at the end of travel. This usually means the mounting bracket has developed play where it welds to the post or gate frame. The motor still reaches its limit switch, but the arm itself is moving independently of the gate leaf by an eighth-inch or more.
• Visible rust weeping from bracket seams. On Sunnyvale gates with underground 770 series arms, moisture wicks into the post weldment through capillary action. By the time you see orange staining, the interior weld may have lost 30% of its cross-section.
• The gate opens fine but closes with a clunk. A cracked upper bracket on a 402 series lets the arm drop slightly on the return stroke; gravity loads the weld in compression on open and tension on close, which is when the crack opens.
• Misalignment between arm and gate that “fixes itself” temporarily. This is almost always a bracket bolt working loose in an elongated hole. The bolt tightens back down, but the hole is oval now and will fail again within weeks.
• Operator error codes after physical impact. If a delivery truck clipped your gate and the FAAC board now throws an overload fault, the arm bracket may have bent just enough to bind the operator without snapping. The motor detects the increased load and shuts down protectively.

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Replacement Cost & What’s Included

The range depends on three things: whether we can weld in place or need to pull the operator, the steel thickness required for your gate weight, and whether the existing bracket is salvageable as a base. We quote the full installed price in writing before any cutting or welding starts, under Haven Standard Clause 1. The work carries our 365-Day Done Right Promise; if a weld cracks or a bolt loosens inside that window, we return and make it right at no charge.

DIY or Call Us?

There’s a clear line between what a Sunnyvale homeowner can safely assess and where fabrication work needs a qualified welder. You can check: whether bracket bolts are tight, whether the arm moves independently of the gate leaf, and whether rust is visible at weld seams. Document what you find with photos; they’re useful for any technician who follows.

What you should not attempt: cutting or grinding a loaded bracket (spring tension or gate weight can shift unexpectedly), welding on a gate connected to an energized operator (FAAC control boards are sensitive to ground current), or heating a galvanized bracket without respiratory protection. The zinc coating on commercial gate hardware releases toxic fumes when welded. We carry the extraction equipment and the 220V portable welder; most residential garages don’t. If your bracket is cracked or your post weldment is rotted, call (669) 900-1904 and we’ll quote the repair in writing before any metal gets cut.

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