Sliding gates take punishment. Rain, dust, the neighbour's cat, and a decade of daily cycling all wear the mechanical hardware long before the motor itself gives up. When yours starts sounding rough, jerking, or refusing to close all the way, it's usually a sign the mechanicals need attention.
The most common sliding gate problems
Nine sliding gate repairs out of ten trace back to four things: worn or flat-spotted wheels, a rack that has come loose or worn its teeth, a pinion that has shifted out of alignment, or a motor that has been silently overheating because it's been fighting the mechanical load.
A gate that jerks as it opens is almost always a rack-and-pinion mesh issue. A gate that suddenly stops halfway is usually the over-current protection tripping on the board — a symptom that the motor is being asked to do more work than it should. Grinding noises point to a bearing on its way out.
If you've seen any of these, don't wait — small mechanical faults become expensive motor failures within weeks. Book a gate motor repair callout.
Rack, wheels and mechanical hardware
The rack is the toothed strip your motor drives against. If it's the wrong height, loose, or made of steel where it should be nylon (or vice versa), it will destroy the pinion inside months. We carry both nylon and steel rack in stock and can replace section by section.
The wheels the gate rolls on are equally critical. Cheap wheels flat-spot, seize, or shear off — all of which force the motor to overwork. We replace worn wheels with sealed-bearing units that will outlast the next motor you install.
Motor, board and gearbox repair
We work on every major brand — Centurion (D5, D10, D3, XTrac), ET Nice, Gemini, Hansa, DTS and BFT — with genuine replacement parts stocked on the van.
For the motor itself, common repairs include capacitor replacement, brush replacement on older DC motors, and full gearbox rebuilds where the worm-drive has worn. Control boards can usually be swapped rather than repaired at component level, and we stock boards for every current Centurion, ET Nice and Gemini sliding motor.
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Load-shedding and backup battery
Sliding gate motors are especially battery-sensitive because they draw more current on start-up than swing motors do. A tired battery that just barely runs a small swing motor will fail dramatically on a heavy sliding gate. We test battery voltage under load, not just at rest — see our gate motor battery replacement guide for what to look for.
When to consider a full replacement
If the gate frame is warped, the concrete pad is cracked, or the motor is a legacy unit with no parts availability, replacement is often cheaper than repair. See gate motor installation for the process.
Where we work
Frequently asked questions
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Book a same-day gate motor callout.
Speak to a real technician. Firm quote before any work starts. 12-month workmanship warranty on every repair and installation.