Swing Gate Hinge and Motor Arm Repairs in Sydney

What goes wrong with automatic swing gates

An automatic swing gate hangs on hinges fixed to a post or pillar, and an operator arm pushes and pulls the leaf through its arc. The arm is usually a linear ram, an articulated (folding) arm, or an underground unit beneath the hinge. Each relies on the leaf hanging true. When hinges wear or a post leans, the geometry changes and problems appear:

• The leaf drops and scrapes the driveway at one point in its swing
• A pair of gates no longer line up when closed, so the lock or catch will not engage
• The gate stops short or bounces back at the end of travel
• The gate drifts or swings in the wind when it should be held
• The motor arm clunks, rattles or has come away from a bracket

Hinges

Hinges carry the full weight of the leaf, plus every bump from wind and the motor. Over time the pin and bush wear, the leaf drops, and the gap at the bottom closes up. Adjustable hinges can often be wound back up. Worn fixed hinges are usually replaced. Replacing hinges on a heavy gate is a two-person job and needs the leaf properly supported while it is off.

Posts and pillars

A post that leans even a few millimetres at the top makes a big difference at the end of a long leaf. Timber posts rot at ground level, steel posts corrode at the base, and masonry pillars can crack. If a post has moved, adjusting the hinge or the arm will not hold for long. The fix may involve re-footing or replacing the post, which can be a bigger job than people expect. In older suburbs with sandstone or brick pillars, a technician may suggest a bracket solution rather than drilling into a pillar of uncertain condition.

Operator arms

Ram arms and articulated arms connect to the post and the leaf with brackets and pivot pins. Those pins wear, brackets loosen, and arms can bend if the gate is forced or hit by a car. Typical repairs include:

• Replacing worn pivot pins and bushes
• Re-fixing or replacing brackets
• Re-setting the mounting position so the arm reaches the full opening angle
• Resetting limits or mechanical stops after hardware changes
• Replacing a damaged arm with a compatible unit

If one motor in a pair has failed and the other is tired, it may be better to replace both so they behave the same. That discussion belongs on our motor replacement page.

Stops, catches and wind

A swing gate should close against a fixed stop rather than relying only on the motor to judge where closed is. Missing or broken stops let the gate overrun and strain the arm. Solid infill gates also catch wind, and in exposed spots near the coast a gust can force a leaf against the motor. A drop bolt or electric lock can help hold the leaves. Locks connected to the system need to be coordinated with the control board so the gate does not try to open while locked.

Safety around swing gates

Swing gates create crushing and shearing points at the hinge side and where the leaf meets a wall or the other leaf. Force and obstruction settings should be tested after any hardware repair, because a gate that used to swing freely may now need different settings. Our safety sensors and servicing page covers what a technician should check.

Send us a few details and a photo if you can. We will pass it on to an independent local technician who can quote the repair.