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Motor runs but chain doesnt - Makita 5012B Electric Chain Saws

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Remove the bar and chain, then inspect the drive shaft and sprocket for broken or missing parts. If the shaft turns, then the transmission is probably ok. If the shaft doesn't turn, then the gear box has a failed component. Hope this helps!

Posted on Sep 09, 2010

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Have a Craftsman 1/2 HP Garage Door Opener, been working fine. Now when you start it you hear the motor running as normal but the chain doesnt move?


You must ensure the drive chain is engaged to the door puller.
Sometimes the emergency release if pulled (red cord) the drive and the coupling come separated.
Make sure the pin is back in place (pull release cord and make sure pin springs back in).
The run an open close cycle, it should pick up the drive again.


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Please dont forget to vote this answer was helpful and accept my answer.


Many thanks

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Feb 22, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opener: motor runs but chain doesnt move.


Depends on your mechanical ability. The drive gear is stripped. The part number is 41A2817 and is available at any door opener service company. It comes with instructions.

Jan 31, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The motor on my Genie Chain Glide garage door operator runs but the chain does not run or move.


If the chain does not move but the motor runs then you have stripped the internal gears. I would replace here. These chain glide units are not very strong. There might be a chance the chain is telescoping down the rail but the trolley is not hooked up. Pull the red cord back toward the motor to engage. Thanks BB

Dec 29, 2009 | Genie Company Genie PowerLift Excelerator...

1 Answer

Craftman door opener brand new wont work?


Sounds like the drive gear is stripped. Remove the cover and take a look. It is white nylon and is just in front of the motor.

Jul 04, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opener motor runs, but the chain drive doesnt turn


If the chain is not moving and the motor is – you need a gear kit.

Unplug the unit - take of the cover – you will find white shavings inside – these confirm the diagnosis. .

Get the gear AND sprocket kit.

It’s a good DIY project but you MUST VERY CAREFULLY Follow the instructions step by step.

HOPE THIS HELPS

Mar 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Motor sounds like it is running but sprocket doesnt move


how old is unit. sounds like gears are shot, takes $25 of parts and 2-3 hours to fix if you are handy. Take cover off, If it has white powder (Not ****), gears are shot.

Jan 14, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Motor runs but gear doesn't turn on my Craftsman 1/2 HP


What did you pay for near gears. curious. often get stripped gears in cold weather as door is frozen down to ground. if possible, kick door bottom edge with heel to break bound if you suspect it is frozen to ground.

Jan 10, 2009 | Sears Craftsman LiftMaster Chamberlain...

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