Alternator brushes question

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pietas

Race Dog
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Alternatortor question: will my alternator work correctly if I attach my new brushes to the bolts holding the brush holder in place?
The brushes always seem  to be soldered to the brush holder
See picture below (encircled in red)

And lastly: how tightly wound should the springs be that push the brushes down?
Do you fit them as the came (brushes are very lightly pushed down) or should it be very tight (and brushes pushed down all the way)

stators.jpg

picture from: https://www.largiader.com/articles/charging/stators.jpg

And brushes look like this
ELA44480.jpg


But then I found this image on www.motorworks.co.uk were brushes are not soldered to holder
ELA43003.jpg

 
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