Winding a New Torsion Spring Over a Park Ridge Door

The centre of a torsion assembly bolts to an anchor bracket fixed above the opening, and everything the spring does is transmitted into that fixing. In the older masonry garages here, the header behind it is often a timber plate bolted flat to brick.

That plate is the first thing inspected. Decades in an unheated building leave some of them split around the bolt holes, or holding fasteners that turn freely in enlarged timber. Winding a fresh spring onto a tired anchor is a repair with an expiry date. Where the timber has gone, the fix is a sound plate properly through-bolted before anything is wound at all.

The door comes down and gets clamped in the track. If the old spring still holds tension it is unwound with bars, never cut. The shaft slides out and the bearings get a look while everything is apart. The centre bearing and the two end bearing plates wear out on their own schedule, and a dry, notched bearing is a frequent cause of the low groan people arrive convinced is the spring.

The new spring goes on, the cones are set, and the winding is taken to the calculated number of quarter turns for the door's height and drum size, with the set screws biting onto clean shaft. The cables get re-seated in the drum grooves at matched tension, then the door is lifted by hand and stopped at knee, waist and shoulder height. The opener goes back on last and re-learns its limits against a door that finally weighs what it always did.