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| Something's not right |
I took apart the opener to see if I needed to order parts or if I could fix it with local hardware store parts, decided I needed to order parts, put it back together hoping it would still work until the parts came in, and then the sprocket sheared off completely.
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| Why is the shaft so skinny by the sprocket? Oh wait. |
I didn't bother tightening the chain last year after already tightening it twice in the last 7 years. It turns out that after the shaft wears through the bushing, the lip of the plate that holds the bushing wears through the shaft from a 1/2" diameter to almost 5/32". A Liftmaster 41C4220A kit including the worm gear and bushings for the motor output shaft ended up being $21 on ebay.
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| So the steel of the plate holding the bushing is harder than the shaft steel? |
