<!-- from fixya rte -->Opener chain not moving and motor humming - Hayward 1.5hp Pool Pump Motor Motor A O Smith Electric Pool Motor for 56j Frame Motors Ust1152
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Is the trolley jammed against the bolt just in front of the motor? If so, loosen the chain until the tension is off the trolley and then run the motor until the door is closed. Now locate the up limit on the side of the motor unit and turn this control 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.
If your door is stuck in the open position the trolley is most likely jammed against the bolt just in front of the motor unit. You should be able to loosen the chain enough that it releases the pressure on the trolley and then close the door. While the door is closed, locate the 'up limit' control which is on the side of the motor unit. Turn this control 2 full turns in the opposite direction of the arrow printed on the cover and then tighten the chain.
You have a stripped drive gear. Remove the cover from the motor unit and you will find white sawdust all over. The part number for the gear kit is 41A2817 and is available at any good door opener service company. It comes with instructions.
Remove the cover from the motor unit and you will find the drive gear has stripped. White sawdust all over. The part number for the gear kit is 41A2817 and it comes with instructions. It is available at any good door opener service company.
If the motor is running but the chain isn't moving you have a stripped drive gear. Remove the cover from the motor unit and check. It should be obvious.
You should check the gears inside the box, After years , the gears get dry and die, you can by online or from Sears the kit and replace the old gears. I just changed mine...not too difficult :) .
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