This is common issue right out of the box with a few motors. The issue mainly comes from the motor’s metal cover. Try and tighten the 5/16 mounting screws. Also check to see if part of the housing vibrates around the front and rear covers, where the light covers are attached. You can apply small strips of adhesive felt on the plastic housing right where the light covers make contact. This prevents the light covers from vibrating on the plastic housing. A less common issue is the metal housing is slightly bent and vibrating on the screw mounting areas. You can use a tape covered screw driver to gently bend the casing back to its normal shape while its mounted. Also check for tightness on the 1/2” nuts and bolts on the prepunch and motor mounting hardware. Please DO NOT MAKE ANY ADJUSTMENTS WHILE THE MOTOR IS PLUGGED IN.
I have the same issue with my overhead door garage door motor. What I did was lube the track with SILICONE lube spray. And I opened up the casing and tested what part is vibrating. Mine was the actual motor. I ONLY sprayed the drive shaft of the motor with wd40, all other components I used silicone lube spray, because petroleum based oils will eat away any rubber/ plastic parts. Still noisy for a belt drive, but reduced the noise by half. Next for me is to get some rubber isolators.
Check all the bolts that attach it to the brackets on the ceiling, make sure they are all tight. If that doesn't help, go on eBay and order the Liftmaster 89lm. It replaces the bolts that the bracket uses to hold the opener. This will reduce all vibrations you have. I have used them several times, it makes a huge difference. If you have any questions, let me know. Thanks
Yes I did to quite an extent. There are rubber bushes available which can be put between the bolts and they work nicely. Look for this on Amazon: LiftMaster - Garage Door Opener Vibration Isolator Kit 89LM. Try this.
