Liftmaster Garage Door Help PLEASE

[EarlyPorsche]

So my liftmaster chain drive is spinning its motor but that power is not translating to a door opening...I can help it open or closed but that is all. It won't move on its own. I am guilty as charged for not touching or inspecting it yet - its cold but I still have no excuse and should have my man card revoked for posting before inspecting.

[daepp]

Could door simply have come released from the trolley/shuttle that's attached to the chains?

[tchanson]

Check the vertical cables attached to each bottom corner of the door? Although both would have to be broken for no movement at all.

I just had a similar problem repaired on a 14 year old 1/2 HP Craftsman chain drive opener.

In my case the nylon drive gear teeth on the motor were stripped. Spinning, but no bite, caused in part by a few wonky old metal rollers on the tracks with shot bearings.

I had the gear in the opener replaced, and replaced all the track rollers with new, much quieter nylon ones and the alignment checked. Good as new.




Tim

[MBAtarga]

You don't mention if the chain is moving - if not - it's likely a clutch adjustment.

[rick-l]

You can find that large round palstic gear with the grease on ebay for $8. The kit with both gears and bushings is $25.

Wonky old metal rollers? I guess it's called sales.

[MotoSook]

This.

You don't mention if the chain is moving - if not - it's likely a clutch adjustment.

[EarlyPorsche]

Chain is not moving. I bought the gears online just now. I'll just replace the gears regardless. What would clutch adjustment entail?

[tchanson]

Originally Posted by rick-l

Wonky old metal rollers? I guess it's called sales.

Not in my case. The metal rollers on my door were 35+ years old and several were completely shot. My fault for not checking them earlier.

I made the significant financial committment of about $25 at Lowes to replace all of them.

With the low interest financing, they'll be all mine in just 36 months.





Tim

[MBAtarga]

Originally Posted by EarlyPorsche

Chain is not moving. I bought the gears online just now. I'll just replace the gears regardless. What would clutch adjustment entail?

If you look at the end of the opener chassis, there is usually a screw/bolt readily accessible for the clutch adjustment. Turn it a half turn or so to increase force and see if that remedies the issue.

[dhoward]

Or has the pin that holds the gear to the motor shaft sheared?