MS661 overheated brake

[esteadle]

We were milling up some wide maple with the CSM after having replaced the chain break lever (broken in a sudden stop while it was in the back of the truck, unsecured). 

I think we must have not seated the brake around the clutch drum properly because it over heated the whole thing to the point where it melted / burned the cover plastic plate. The whole saw body was hot like that. 

Now the clutch seems to be fused to the clutch drum. I can't start it with the brake on, but it will start up right away without. As soon as I brake it, it stalls. 

The question is what do I do now? 

I can probably pull the clutch apart but I need the rubber stopper tool to hold the piston and turn the clutch backward, I guess. But then what? Looking for advice and/or pictures of a teardown. 

Thanks.

[sawguy21]

Remove the clip then pull the drum off, the clutch will then slide off the shaft.

[esteadle]

Pulled the clutch drum off to find that the inside of this drum uses a plastic bearing cage and that melted inside seizing the bearings and pushed up the clutch drum enough to contact the brake making it all worse. 

We had to keep going as there is a worm drive spring that is not catching the notch in the clutch drum and that will apparently prevent oiling. That spring was melted too. Nobody stocks those apparently, and we are down for 2 weeks waiting on the parts. Sigh. 

[Al_Smith]

Dealers are not all the same .The one I deal with orders parts twice a week .I've always got my parts within 3-4 days .Of course there is always E-Bay .
Edit --I just saw ChainsawR is back on the sponsors list .I've had very good luck with them on used and some times new parts .Another option .