Eaton 3-wire PT/T electric motor armature question w/ photos

[creol]

Can someone verify me one thing about this armature: should the round brass-coloured end-piece be placed on top of the armature shaft (it's currently very firmly seated in there) or should the brass piece be a part of the electric motor's top cap, serving as a bearing-type insert in which the armature head should be placed (and freely rotating in)?
To answer this one I think you should have disassembled one of these, so any advice telling me to check out some parts lists or blowout pictures are unnecessary, since I've already looked at those and I'm starting to think that the brass piece shown in picture should not be there... of course right now I have the boat in the water with a malfunctioning PTT so I can't really give any additional info right now.
My personal opinion is that the motor sucked some salt water some year after being manufactured in 1985 and then the brass cap ended up seizing on that armature end and thus got taken off its original position. I just would to get a confirmation if my hypothesis is correct or not, before dismantling the unit for the 3rd time. The PTT unit works intermittently, when working it sounds and works great but most of the time it makes a bad grinding noise and doesn't move up or down. When grinding, the motor also heats up quite a bit. The armature looks a bit bad, I know... The engine is a 4cyl Mercury 75 hp, 1984.
Best Regards,
Tatu, Helsinki, Finland

 

[sam am I]

The Bushing appears to be seized on the shaft end(see drawing below) and is pulled out of its housing. It was/is most likely spinning in its housing creating heat/drag/noise. The bushing's inner housing might be wobbled out too much as well and armature might be hitting the mags.

And yes, I just had one apart. Its bushing wasn't seized though. Therefor and as stated above, I'd think it's certainly possible your bushing's housing could be shot due the the bushing spinning in it. Fixing the frozen bushing and putting it back in a "wobbled out" housing might not work too well.

But, being cheap, I'd try, I'd go as far as re-centering it with some packing of some sorts if I had too!!.......Think I'd pull/work the bushing off the shaft end w/o distorting it(perhaps a propane fine pin point and a little even heat all around will assist by expanding the bushing a tad), use some wetted ultra fine wet/dry 5000 grit paper if needed to clean up shaft steel where the bushing rides if needed, use a light re-assembly oil, 3 in 1 works well for me..........GL.

 

[sam am I]

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[creol]

Thank you very much for your quick and accurate reply. I will try to separate the bushing from the armature and then figure out how to mount it back into the original position. Maybe some type of 2-component epoxy glue or similar will do. I will have to consult some professionals on that...

 

[sam am I]

Np and GL