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Old 03-12-2014, 09:12 PM   #16
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Sears Craftsman Garage Door Opener bearing assembly?


Yep, no pics needed, I got one that looks identical that I installed in 1984. They only used the dip switches until 91 or 92 but the silver cover likely means it's closer to mid 80s.

You can buy the bushings and [ame="http://www.amazon.com/LiftMaster-Sprocket-41C4220A-Chamberlain-Craftsman/dp/B006L8CZKI/ref=sr_1_4?ie=UTF8&qid=1394669626&sr=8-4&keywords=chamberlain+gear+kit"]new gear kit for about $30[/ame], if the motor or motor shaft isn't hurt from the shaft traveling back and forth. The end of the motor shaft may be worn beyond being usable, hard to tell without close inspection what exactly has worn out.

You can get just the gears and bushings a little cheaper without the main shaft, but I have also seen the shaft cut itself right off under the sprocket when that bushing goes. Probably mostly due to the chain being overtightened.

About the only problem with any of these is eventually the big plastic gear will wear out. It will usually last 15+ years, but if you have a door that works poorly, catches, sticks or the opener has to do too much the gear can be destroyed very quickly. I use the Chamberlain brand, have put up a couple from Sears and a few of the "Do It Best" brand from the local home center. I have never really found much of a difference in the brands, other than the remotes and wall controls may look a little different.

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Old 03-12-2014, 10:35 PM   #17
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Sears Craftsman Garage Door Opener bearing assembly?


I actually use the Bike Lube grease that comes in the Green tube, that you get from the bike shops, on the gears. Stays on even in cold weather. Actually quiets the gears then just using standard grease.

For the chain, I just use Bike chain lube. When I went over to my niece's house last Summer. Her father in law had over oiled the chains on her openers so much, that it was dripping off of the chain as you stood there looking.
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Old 03-13-2014, 08:39 AM   #18
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Sears Craftsman Garage Door Opener bearing assembly?


Thanks again for the help everyone!

I ordered this Chamberlain Model# PD212D.
http://www.sears.com/shc/s/p_10153_12605_00990358000P

I should have it in a week. Until then, I am going to explore rebuilding my old Crafstman. Tomorrow, i'll pull the old one down and have a closer look at everything to see how bad it is.
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Old 03-16-2014, 11:36 AM   #19
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Sears Craftsman Garage Door Opener bearing assembly?


I pulled the Crafstman down and opened it up again to get a better look at the end of the shaft.

Here's the pile of dust/metal shavings that was in the cover.



The snap ring and washers that were the only loose things on the shaft between the rpm sensor and the plastic bushing that holds the shaft in place. I can slide the shaft a full 1/2" - 3/4" forward or backwards.



Here's a close-up of the shaft where the snap ring and washers were.



How worn is the shaft? Too worn for new parts?





Oh, and here's why the light socket was held in with tape.

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Old 03-16-2014, 02:36 PM   #20
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Sears Craftsman Garage Door Opener bearing assembly?


Looks like they had a 100 watt bulb in the light socket. As for the shaft. Yep, looks a little worn for wear.
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Old 03-16-2014, 02:54 PM   #21
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Sears Craftsman Garage Door Opener bearing assembly?


r0ckstarr, I am still willing to take the remotes off of your hand, for the old unit. Just let me know what the shipping cost is, and I will work it out with you.
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Old 03-16-2014, 05:47 PM   #22
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Sears Craftsman Garage Door Opener bearing assembly?


Looks done for, never going to work right with that much wear. The cost of a replacement motor is probably going to be more than it's worth. You might find a used one on ebay but really not sure its worth the effort.
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Old 03-27-2014, 09:56 AM   #23
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Sears Craftsman Garage Door Opener bearing assembly?


Quote:
Originally Posted by r0ckstarr View Post
Thanks again for the help everyone!

I ordered this Chamberlain Model# PD212D.
http://www.sears.com/shc/s/p_10153_12605_00990358000P

I should have it in a week. Until then, I am going to explore rebuilding my old Crafstman. Tomorrow, i'll pull the old one down and have a closer look at everything to see how bad it is.
I got the new one in and put it up with all of the new parts. Perfect fit in the same place as the old. I never realized just how loud my old one was until I ran the new one.

I've decided against rebuilding the old one. You guys were right. The cost of the new motor is almost the cost of a new opener all together. I searched everywhere, and couldn't find a new motor at a reasonable price, and eventually gave up looking.

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