A home handyman always looking for solutions

[jrm7997]

Hello from my cold garage.

No where near as cold as the Eastern N America but cold enough that id rather look for solutions to a very unique problem on my computer than be out in the garage.

Her goes.

I have an old Porta Cable band saw model 724 (725 726). It's an old beat up great tool that is just holding on. I'm using some duct tape to hold on a brush because I've never seen something that works better

But, I'm starting to get a lot of sparking on that brush. To the point that I either run it into the ground and chuck it when it dies (noooooooo) or clean up the rotor brush surfaces.

Id like to take it apart and clean it up. But, I can't get it apart.

I hope someone here can help or point me somewhere to help. I've spent a considerable amount of screen time trying to do this. Too many "how to change a saw blade" videos.

I'm including pictures. At this point my big ask is how to get plug #70 out. I think it will give me access to the nut on the end of the rotor shaft.

I've also included a pictures of the big round plug on the old girl. BTW, I've heated
/Shock cooled the area around the plug/nut and can turn it a bit each direction


Thanks in advance. If love to keep this old girl running.

 

[bugzilla46310]

If you can turn the plug a bit each way, my suggestion would be to soak it with your favorite penetrating oil, let it soak a day, then try to turn it that bit you say you can rotate it each way, maybe with a little heat on the housing when you soak it and trying to turn it. May take several sessions. I would guess the housing is aluminum and the plug is steel and you have galvanic corrosion going on.

 

[nadogail]

IMHO, brush sparking is commonly cured by brush replacement and commutator resurfacing. Occasionally you may have to undercut the insulation that separates the segments of the commutator.