Middlesex Garage Door Co. · London
Garage Door Roller Replacement: how the work is done
Garage Doors · London, Ontario
Roller replacement changes the small wheels that guide each section of your garage door along its track. A four-section residential door usually has ten of them: one at each end of the three hinge lines, one in each top fixture and one in each bottom bracket. Each is a wheel on a steel stem, commonly on ball bearings though some nylon rollers run bearingless, carrying a share of the door's weight more than a thousand times a year. When they wear, the door turns loud and rough. Fitting a matched set of new rollers, then checking the track and hinges they run in, brings back smooth and even travel.
Weight and build of the door
A single-skin steel door, an insulated double-skin door and a solid wood door place very different loads on their rollers, and the top rollers on a heavy door carry the most, since they travel furthest along the horizontal track under load. The technician identifies the door's construction and approximate weight, checks whether the end stiles carry single or double hinges, and looks at the rating of the rollers currently fitted. Many heavier doors left the factory on light plastic wheels intended for the lightest door in the range. Matching the new set's load rating and bearing count to the actual door is what makes the replacement last.
Securing the door before a roller comes out
Nothing is unbolted until the door cannot move. The technician disconnects the opener, positions the door where the work is safest for the rollers being changed, and locks it there with clamps or locking pliers set in the track under the wheels so the sections cannot slide or drop. With a heavy door left in the open position, the horizontal track and its hangers are checked for a firm hold first. This set-up takes a few minutes and is the reason the rest of the job can proceed calmly, one roller at a time, without a section shifting while a hinge is loose.
A record of what was fitted
You should know what is on your door. The technician leaves you with the roller type and material, wheel size, stem length by position, bearing count and load rating, along with any hinges, fixtures or brackets replaced and any track adjustment made. Keep this with the owner's manual and the date of the last spring replacement. It answers the questions that come up later, such as which stem length to order if a single wheel is ever damaged, and it lets a future technician see at a glance what the door carries and when it went in.