Things You'll Need:
- Ladder
- Tape measure
- Pencil
- Drill
- 7/16-inch hex head adapter for the drill
- Ratchet
- 9/16-inch socket
- Carpenter's level
-
Step 1
Measure the width of the garage door. To find the center line of the garage door, divide the width measurement by two. Measure over from one edge of the garage door and mark the divided dimension with a pencil mark, near the top of the door.
-
Step 2
Hold the door mounting bracket on the door, centered on the garage door's centerline and as close as possible to the top of the door. Mark the mounting hole location on the door with the pencil. With the drill and 7/16-inch hex head, run a self-tapping screw into one of the mounting holes. Leave the screw slightly loose.
-
Step 3
Check the mounting bracket for plumb (vertically level) with the carpenter's level. Tighten the self-tapping screw that you left slightly loose. Run another self-tapping screw into the other mounting hole.
-
Step 4
Attach the short curved leg door arm to the door mounting bracket. Align the mounting hole. Slide in the clevis pin. Secure the clevis pin by inserting the cotter pin into the hole of the clevis pin.
-
Step 5
Attach the straight door arm to the automatic garage door opener carriage. Secure the straight door arm to the carriage with a clevis pin and a cotter pin.
-
Step 6
Connect the straight door arm and the curved arm by aligning the mounting holes in each door arm. Insert two 3/8-inch bolts through the mounting holes of both door arms. Thread a 3/8-inch nut onto each bolt. Tighten the bolts with the ratchet and a 9/16-inch socket.
-
Step 7
Check the connected door arm to ensure that the door arm is not sitting plumb (vertically level). If the door arm is sitting level the automatic garage door opener will bind and not open. Re-align the mounting bolts and slide the carriage toward the power head. Re-secure the door arms as listed previously.
