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Forum topic by ElliottWilson posted 08-08-2016 04:50 PM 378 views 0 times favorited 4 replies Add to Favorites Watch
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ElliottWilson

3 posts in 122 days


08-08-2016 04:50 PM

Topic tags/keywords: tablesaw

i just purchased an ‘84 pm66 and I’m having trouble with the mag switch.
everything is hooked up and works when i press down the mechanism manually but the start button does not work
the lever that the start button presses down on does nothing and i have to manually push the body of the starter down for the saw to start
there does not appear to be any damaged components so i must just be doing something wrong
i was wondering if anyone else here has a diagram available or any advice would be appreciated


4 replies so far

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MrUnix

4234 posts in 1665 days


#1 posted 08-08-2016 05:13 PM

That is a pretty standard ITE starter, but a picture of the insides would be helpful. The start button should press down on a button on the contactor – which should be the same button you pressed manually to get the machine to turn on. If the front button isn’t doing that, then you need to figure out why. While in there, I would also check to make sure your control transformer is wired for the proper voltage/phase and that it’s output voltage matches that of the contactor coil.

I have the wiring diagram for a similar Gould/ITE starter from a PM45, but it was almost unreadable – so here it is cleaned up as best as I could do. Pretty complete, but some of the wording could not be determined (substituted with question marks ’?’):

And here is a picture of the guts for that one, which should be similar to yours:

The black and red buttons on top of the contactor is what the start/stop buttons on the front of your box should press against. The white buttons at the bottom are resets for when the heaters trip. The control voltage transformer is on the right.

Cheers,
Brad

PS: If you haven’t already done so, head on over to OWWM for all the info you could ever want on that PM66. At the very least, new bearings and belts should be installed along with a general cleanup.

-- Brad in FL - To be old and wise, you must first be young and stupid

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ElliottWilson

3 posts in 122 days


#2 posted 08-08-2016 08:20 PM

The start button only contacts the lever marked “1”
to lower the contact plates i need to press on one of the places marked “2”

PS: the photo in my original posting is not of my machine but it is the exact starter i have. I’m in my office right now and cant go take photos of it. The guts of my starter look virtually the same to yours sans the transformer on the right

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MrUnix

4234 posts in 1665 days


#3 posted 08-08-2016 08:48 PM

Then you have a mechanical problem somewhere inside that contactor. Pull the cover off and see what is going on. The black button (#1) is the only thing that should be pushing the contacts closed. Your start button on the front of the box is working correctly if that is what it is contacting.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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ElliottWilson

3 posts in 122 days


#4 posted 08-08-2016 09:19 PM

thank you very much for your help.
i’ll update with some photos of the starter disassembled if i need further assistance

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