Lay the chain on the garage floor while you complete the repair.
How to change drive gear on craftsman garage door opener.
Pull the chain off the motor unit sprocket and out of the chain spreader.
This was a craftsman model 139 53976srt.
Use a punch and hammer to drive the roll pin out of the drive shaft.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
How to replace a gear and sprocket in a chamberlain liftmaster sears craftsman garage door opener duration.
Put a thin layer of the grease included in the kit on the gear.
Slide the new drive gear onto the drive shaft and line up the mounting hole in the drive gear with the hole in the drive shaft.
Replace the cover on the garage door opener plug it back in and start enjoying your now functioning garage door opener.
Slide the outer trolley away from the inner trolley.
Step by step garage door opener gear fix.
Replace the drive gear.
3 lube all the teeth of the replacement gear and the worm gear it engages then place the new gear on the shaft and drive the roll pin back in to hold it.
4 replace gear mechanism lining up the screw holes on top.
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Pull the drive gear off the drive shaft.
With the gears back in place tighten the chain as directed in your owner s manual.