Garage Door Motor Coupler
It s really simpler than it sounds.
Garage door motor coupler. This means that when you connect them and press the opener button the motor will try to lower the door which is already down and you may break your new coupler. Then insert the drive screw shaft into the coupler you ll have to rotate the screw shaft to get the squared end lined up with the square hole in the coupler and bolt it back in place. Liftmaster 25c20 screw drive sprocket coupler. A garage door that operates as it should lasts longer and gives you better service than one that is neglected squeaky and beat up.
The lock release will have a cord with a t handle at one end next disconnect power supply undo the bolts holding the motor to the hanger frame. If you pressed the open button but the garage door didn t move your motor side of the coupler is in the up position while your door track side is in the down position. Make sure door is in down position and to release the lock on it. Pull the coupler off the motor shaft and insert the new one in its place.
Use this lubricant for all the moving parts on your door.