Clean the shaft with acetone or similar and the new one will go on pretty easy.
How to replace a craftsman garage door opener gear.
Careful prying with a screwdriver will ease it off.
Key the model number into the search bar on the sears partsdirect webpage to view parts for your craftsman garage door opener.
With the gears back in place tighten the chain as directed in your owner s manual.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
Remove the gear and sprocket assembly.
Install the new gear and sprocket.
Replace the cover on the garage door opener plug it back in and start enjoying your now functioning garage door opener.
Select the parts section of your craftsman garage door opener that you want to view.
Put a thin layer of the grease included in the kit on the gear.
Step by step garage door opener gear fix.
Unplug the garage door opener.
Now you need to install the new helical gear assembly.
Slide the outer trolley away from the inner trolley.
Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley.
Use a step ladder to access the garage door opener s power cord and motor unit.
Make sure everything is seated back in the original positions and the interrupter wheel is fully seated.
Remove the chain and cable assembly.
Pull the chain off the motor unit sprocket and out of the chain spreader.
This was a craftsman model 139 53976srt.