Linear Gate Motor Replacement Nationwide

Linear Gate Motor Replacement: The San Mateo Owner’s Guide

Linear gate motor replacement in San Mateo typically runs $680-$1,450 installed, depending on whether we’re matching a swing-arm actuator like the HSLG or HCT series or a slide-gate operator such as the LSO50 or LDCO800. We stock Linear-compatible motors and mounting hardware on our San Mateo service trucks, and most replacements are completed in a single visit once the model is confirmed. If your gate hums without moving, reverses mid-travel, or won’t respond to the remote, the motor or its internal gearbox has likely failed.

Call (650) 293-9440

Which Linear Models This Applies To

Linear distributes gate motors under several series names, and the part you need depends on gate type, weight, and the year of installation. For swing gates in San Mateo, we most often see the HSLG (light-duty residential), HCT (medium-duty with hydraulic-closer-style operation), and ACT (linear actuator) series. Slide-gate properties typically run the LSO50 or LSO800 for lighter residential tracks, or the LDCO800 and LDCO1500 for heavier commercial-duty applications.

The model number lives on a metal or foil label affixed to the motor housing, usually on the side facing the gate post. If that label is sun-faded or painted over, we measure the arm length, bracket spacing, and gate weight to cross-reference. Linear OEM motors carry a two-year factory warranty when installed by an authorized technician; we also source quality aftermarket equivalents from US Automatic and Elite for older discontinued series where OEM stock has dried up. The aftermarket route saves roughly $180-$320 on parts, though we always confirm duty-cycle rating and limit-switch compatibility before substituting. Vance Gate Repair San Mateo is an independent service provider, not affiliated with Linear LLC.

Signs Your Linear Gate Motor Replacement Is Failing

• Humming without movement. The motor draws power but the gearbox won’t turn, usually indicating stripped nylon gears or seized bearings inside the housing. In San Mateo’s coastal humidity, we see this more often on motors mounted low to the ground where moisture collects.
• Gate reverses before reaching the limit. The motor’s internal limit switches are worn or the magnetic encoder has lost calibration. The motor thinks it has reached full travel when it hasn’t.
• Intermittent response to remote or keypad. If the control board tests fine and wiring is intact, the motor’s capacitor or start winding may be failing under load. Heat cycling from Peninsula summer afternoons accelerates capacitor drying.
• Visible oil or grease leaking from the housing. Linear hydraulic-closer models like the HCT series rely on sealed fluid pressure; a leak means the motor can no longer generate rated torque and will soon stall entirely.
• Gate speed slows noticeably over weeks. Worn brushes in DC motor variants, or degraded gearbox lubrication in AC models. The motor works harder, draws more amperage, and eventually trips the circuit board’s overload protection.

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Replacement Cost & What’s Included

Most Linear gate motor replacements in San Mateo fall between $680 and $1,450, with the spread driven by three factors: motor series and torque rating, whether the existing mounting bracket and arm geometry can be reused, and whether the control board or safety devices also need attention. A straight HSLG swap on a standard single-family driveway gate with intact hardware lands near the lower end. An LDCO1500 on a commercial slide gate with corroded rail brackets and failed loop detectors pushes the upper range.

We deliver a written price before any work starts, under Haven Standard Clause 1. That price includes the motor, installation, limit-switch setup, force testing, and a photo log of the completed work. The 365-Day Done Right Promise covers the full installation. Name what you found. Name what it costs. Name what you left behind.

DIY or Call Us?

A homeowner can safely verify power at the outlet, check for tripped breakers, and confirm the manual release disengages properly. Beyond that, Linear gate motors weigh 18-45 pounds, operate on 110-240V AC, and require precise limit-switch calibration to avoid crushing force or entrapment hazards. The torsion spring on some swing-gate arms stores enough energy to cause hand or wrist injury if released incorrectly.

We don’t recommend DIY replacement. The motor must be matched to gate weight and duty cycle, the control board parameters reprogrammed, and the safety reverse tested with a calibrated force gauge. In San Mateo, permit requirements for automated gates on shared driveways or commercial properties add another layer. We handle the match, the wiring, and the documentation. Call (650) 293-9440 and we’ll confirm your Linear model over the phone, then schedule a free written estimate.

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