Model 139.53964SRT
For the past few weeks occasionally i had to hit the opener several times before it would go down completely. it would start, go down to various levels and go back up. today it would only start to go down and immediately go back up. Check the tracks and looked for anything in the way. disconected the door and it still did it. still found no obstruction. I removed the cover and can see the back part of the motor (away from the gears) is trying to turn. There are 4 rubber stoppers towards the front that are being destroyed when this tries to turn. It hits a bolt from the housing, stopping the turn, hence the door goes up.
to try and simplify this question, do you think the whole motor needs replacing or is there something else amiss?
Thanks for your time.
is this a belt driven unit, a chain driven unit, a screw drive?
those motors rarely fail.
will the door close all the way when you hold the wall button?
are the safety sensors lit? is the green one solid?
please try to use as much detail as possible.
Check the tracks and looked for anything in the way. disconected the door and it still did it. still found no obstruction
When you disconnect the door from the trolley the unit still short cycles.....correct ?
Does this look like your motor ?
That is the motor. The cylinder section is trying to turn. Where the break is between the cylinder and the screw is where the rubber stoppers are/were. it seems to me that they are there to secure motor from turning, but with the motor trying to turn it is shearing them away. I dont want to keep trying it after i realized the motor is doing this as it seem to be doing more damage than good.
thanx guys for your time.
Darren,
Belt driven. The sensors are lit and it wont go all the way down when holding the button.
that motor has a lifetime warranty and you should be able to get a new from Chamberlin/Sears free of charge. installing a new one is a breeze.
According to my manual, it is a 5 year warranty. i may have to buy a new motor.
Thanx for your time.
i would double check that. in any case, it seems to me there are small screws that go through the rubber motor mounts. were there any screws rolling around in the case? i have a bunch of these openers @ the shop for parts, ill refresh my memory in the morning and get back to you.
Didn't see any screws, but one of the rubber stoppers was laying in the pan and the others look like they could go.
Tags: door, opener, motor, rubber stoppers, trying turn, your time, anything disconected, anything disconected door, anything disconected door still, anything disconected door still still, Check tracks, Check tracks looked
