Old Genie Garage Door Opener - Gear and Sprocket
We have an old genie model SP99 garage door opener. The motor stills works, the plastic gear still turns but the door will not open or close without assistance. Could the chain sprocket 'slip' when the gear is turning? When giving assistance the chain does move down the track like normal to it's limits and then stops like it should. I see that a gear wheel and sprocket assembly is available as a replacement part (#26289). Do you think the problem with my opener is a bad gear and sprocket assembly? When I stand on a ladder and watch the plastic gear wheel, it does spin without any difficulty when switched on, but the chain does not move. If the gear and sprocket assembly is bad, is this a difficult replacement job for a do-it-yourselfer?