on 10/6/2007 6:44 PM Dimitrios Paskoudniakis said the following:
One of my 3 Sears Crafsman 1/2 hp garage door openers is not working. It is
stuck in the open position, so I closed it by releasing the emergency
handle.

The trolley is firmly wedged against the cover protection bolt instead of
having stopped at a normal 2 - 4 inches short of the bolt. The small length
of chain on one side of the motor just before the cable feels extremely
tight and won't budge, while there is a little play in the chain on the
other side of the motor (the long length of chain). Also the indicator
light next to the button for changing the remote code is blinking.

When I press the button in the garage to close the door, the motor hums for
a couple of seconds, then stops humming, but the trolley won't move.

The manual isn't clear, and I'm guessing the issue is straightforward, I'm
just don't know what the issue is.

Please advise.


Unplug the door opener. Remove the case from the opener. Look inside at
the gears. You will find that they are nylon and are probably worn badly.
If so, check for the model number of your opener (My model number is
behind the bulb lens and is 139.53603, so it is a Chamberlain).
Find a Sears parts store in your area or go to Sears.com (
http://www3.sears.com/ ), and check for the repair kit for your model.
It contains new gears, bushings, washers, lubricant, a couple of hex
head screws, and other small parts. I paid around $23 for the kit 2
years ago at my local Sears parts store and used only the gears.
I don't know if your model number is the same as mine, but if it is the
same, here are all the numbers from my kit parts box:
A couple of large numbers; 65409 and 41A2817. Also smaller numbers MFG
code 125512, and the SKU under the bar code D98M65409.


--

Bill
In Hamptonburgh, NY
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