Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
This is not uncommon on many openers.
When installed some contractors just use minimum bracing for the motor unit.
I tend to add a small amount extra. If you have the motor unit mounted directly to your garage roof then it should be fine but i that case I would be checking the gear chain wheel to ensure it is secure to the shaft
Do not put your fingers anywhere near the unit whilst testing and go for a visual inspection only !
Next ensure power to the unit is off and try work the gear to check for any play. If there is play then check the screws that lock the wheel to the shaft and the motor mounts
If it is suspended from the roof then add extra bracing on the diagonals to firm up the drop legs or even an extra brace out from the rear of the unit.
There are two schools of thought on this practise of extra bracing and it is not always recommended but from practical experience and long term usage I have found it to save money.
Posted on Aug 27, 2010
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Posted on Jan 02, 2017
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