Fixing Sears Craftsman Garage Door Opener--stripped gears

How to replace stripped gears in your Sears Craftsman automatic garage door opener. This may not apply to all models but has some good tips in making the repair. Links on where to get replacement parts and required tools are included.

Category:

Howto & Style

Tags:

• sears
• craftsman
• garage
• door
• opener
• 139.53674SRT2
• 41A2817
• gears
• worm
• screw
• drive
• repair
• DIY
• home
• automatic
• stripped
• motor
• overhead
• chain
• change
• replace
• new
• liftmaster

[Quick2000]

Mine is belt drive and only several months old. The door is not opening more than a foot and stops. I can manually press the black button on motor unit and the door will go all the way up. Manual says maybe travel module is not connected or needs replaced, its not making any noise at all, just stops

[timetotravel]

@Quick2000

My opener would "stall" during open and return to close. I found some adjustments that alter the close/open force. If yours has the force adjustments perhaps they need to be increased?

[veroyfofo]

Thank you so much for your information. We just changed the gear on ours, we have the same opener as the video. However, we had a problem getting it to close and open to the right time- we changed the up and down buttons- Now the motor is getting too hot and stops working- once it cools down it's fine- What do you think we need to do?

[timetotravel]

1) Are you sure the door is not bottoming out on the floor? Probably a long shot but if it were the motor would heat up 2) did you use plenty of grease? 3) are the springs that help raise the door adjusted correctly--basically can you open and close the door with minimal effort--if not CAREFULL IN ADJUSTING THE SPRINGS. huge force that will go boing. 4) dry chain or rollers? 5) try disengaging the door from the connecting rod to isolate where the excessive resistence is.

[tmanthorne]

MAN! That was a great video! Well done, clear instructions and easy to watch. Thanks for saving me money. PS- do you have any videos on raising 3 daughters?

[timetotravel]

@tmanthorne

The more time you spend with them, the easier it is. Spend some time with them making youtube videos--you will be amayzed on the benefit to all.

[sharajc]

AWESOME IS ALL I CAN SAY!!! Thanks for saving me from having to call a serviceman!! It was AS EASY AS YOU SAID!!! All I can add, if someone hasn't already, when you put the top round piece back on (where the main metal gear is/where the chain of the opener wraps around) be sure you line it up so the very top guard piece lines up with the aligning groove cut out so it locks back into place. Mine is flapping loose at the moment, so I have to take apart and realign.

[jaybone317]

Can someone point me to the links to get the replacement tools? I think I have this exact problem. I will take the cover off tonight and check for the plastic shavings! Garage door opener makes noise but the chain isn't moving anymore. This looks like my exact model as well! Great video!

[Bouncepass3]

With the help of this video I installed the replacement gear yesterday.  The step by step instructions are excellent and saved me money and time. Thanks for the high quality video!

[you0rsp1]

Thanks for the helpful vid. My moms door just went down and she was about to buy another one. I told her to hold till I could look at it. Saw that gear was worn, found your vid, saved her some money. Jesus bless you, take it easy.

[1971tdog]

Holy crap dude my door just stop and found the exact problem with exact same opener you did. It looked like mice had got in the motor it was so bad. Thanks a lot for the great video. I thought I was going to have to get a whole new opener. Keep those videos coming as they are really well done.

[chelodeconcon]

Thank U!!! I found the video great. I would point out that two of the screws come out easy, for the third one I used a rachet (sp?).