Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
I RECENTLY INSTALLED A GEAR KIT IN MY CRAFTSMAN 1/2 HP
DOOR OPENER.AFTER INSTALLING THE KIT THE DOOR ONLY OPENS APPROX 18-24 INCHES AND CLOSES IMMEDIATELY.I REMOVED THE CHAIN FROM THE TOP GEAR AND STILL ONLY
ROTATES A FEW TURNS.I HAVE ADJUSTED THE UP TRAVEL KNOB TO FULL NO DIFFERENCE,I ADJUSTED TO UP FORCE KNOB STILL KNOW DIFFERENCE.THE DOOR WORKED CORRECTLY BEFORE INSTALLING THE KIT .IAM STUMPED.HELP!
IS IT POSIBLY THE LIMIT SWITCH?
You say it only opens two feet?? Then closes?? If I may if you a little bit more costly option. Dont replace the gears. They used to be really good 8 years ago but the way they make the gears now there too soft and often strip out much faster. I would suggest that you do what we call a motor head change out. Take off your old chain drive motor head and buy a new one. Pretty simple. Two things though one always make sure you put the new one in with the door down. And the traveler in the down position ( The traveler is the metal thing hooked up to the chain) but far and your gear that you have it sounds to me that you dont have the gears close enough.. but 100 percent on that but a door should never close on it own. It's not safe.
Posted on Feb 10, 2009
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Posted on Jan 02, 2017
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