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Forum topic by williemakeit posted 03-16-2018 09:15 PM 393 views 0 times favorited 6 replies Add to Favorites Watch
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williemakeit

9 posts in 128 days


03-16-2018 09:15 PM

Greetings LJ, (Greenhorn here) First post on the forum.

I have a capacitor issue on my Boss Oscillating sander(31-780) and l’m looking for an replacement. l looked on some old wood threads but the item is no longer available.
https://www.tedss.com/D22A2516M21

Where elsa can l look?

Cheers Bill


6 replies so far

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MrUnix

6830 posts in 2255 days


#1 posted 03-16-2018 09:21 PM

That’s just a 16uf capacitor that you can source from anywhere. If you need the exact form size, there are several places on-line where they are available. Otherwise, any one with the same rating (16uf @250V) will work. Note: You can get one with a higher voltage and it will work just fine (and probably last a bit longer) – but don’t get one rated for less voltage.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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williemakeit

9 posts in 128 days


#2 posted 03-16-2018 09:51 PM

Thank you Brad :)

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oldwood

143 posts in 1300 days


#3 posted 03-17-2018 03:25 AM

Timley post for me Willie. My Boss is giving trouble also.
Motor comes on and runs fine with no problems anywhere in the moving parts, so no binding anywhere but after 2 or 3 minutes the motor begins to get hot and if left running will begin to smell and smoke. I thought capacitor also but it does not seem to be heating up.
Any ideas anyone?

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MrUnix

6830 posts in 2255 days


#4 posted 03-17-2018 04:35 AM


Motor comes on and runs fine with no problems anywhere in the moving parts, so no binding anywhere but after 2 or 3 minutes the motor begins to get hot and if left running will begin to smell and smoke. I thought capacitor also but it does not seem to be heating up.
Any ideas anyone?
- oldwood

Lack of maintenance (cleaning/lubrication) and/or bearings.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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CaptainKlutz

322 posts in 1550 days


#5 posted 03-17-2018 05:56 AM

oldwood
Do not know about your tool, but it sounds like the RUN capacitor has failed?
Many woodworking motors have both a START and RUN capacitor.
Capacitor will not get hot when it fails.
When RUN capacitor fails; motor will usually lack power and overheat when running.
When START capacitor fails; motor typically does not start turning by itself (but can be coaxed to start by hand), lacks power, and/or sits there humming till it overheats.

Best Luck.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

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MrUnix

6830 posts in 2255 days


#6 posted 03-17-2018 06:57 AM

Do not know about your tool, but it sounds like the RUN capacitor has failed?
Many woodworking motors have both a START and RUN capacitor.
- CaptainKlutz

AFAIK, that 1/4hp motor doesn’t have a run capacitor, just a start cap (only one hump on the motor housing). If it did, that would certainly be suspect as well. But the manual does say that the grease in the gearbox needs to be checked/replaced after a certain amount of time (100 hrs?) of use. I’d also suspect bearings as they are exposed to a lot of sawdust falling directly down on them. YMMV.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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