How do you replace the screw drive socket coupler on a chamberlain 4600 garage door opener? part #25c20.
Make sure you put the black cup back on the end of the motor shaft and that it is pressed all the way on. Make sure the RPM sensor is plugged in. If neither of these are the issue, then you probably did not have the motor shaft pushed all the way back when you tightened the coupler after replacing the worm gear. Loosen that coupler up and from the front of the motor (opposite end in which the coupler is on) push the shaft back as far as it will go. Hold it there while you tighten the coupler back up and then try it.
You
probably did not have the motor shaft pushed all the way back when
you tightened the coupler after replacing the worm gear. Loosen that
coupler up and from the front of the motor (opposite end in which the
coupler is on) push the shaft back as far as it will go. Hold it
there while you tighten the coupler back up and then try it.
If you didn't just change the drive gear you will find the motor shaft is moving towards the rear and knocking the interrupter cup off. Replacing the drive gear with the new coupler and washers will cure this problem.
Make sure you put the black cup back on the end of the motor shaft and that it is pressed all the way on. Make sure the RPM sensor is plugged in. If neither of these are the issue, then you probably did not have the motor shaft pushed all the way back when you tightened the coupler after replacing the worm gear. Loosen that coupler up and from the front of the motor (opposite end in which the coupler is on) push the shaft back as far as it will go. Hold it there while you tighten the coupler back up and then try it.
1,084 views
Usually answered in minutes!
×