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R27 GENERATOR HELP PLEASE
Posted: Thu Dec 10, 2020 3:55 pm
by bimmerwork
IS THERE A METHOD TO BENCH TEST THE BOSCH GENERATOR ? ( REGULATOR IS NEW )
IS THERE SOMEWHERE WHERE IT CAN BE SENT TO FOR TESTING ?
THANKS, WILL
Re: R27 GENERATOR HELP PLEASE
Posted: Fri Dec 11, 2020 11:37 am
by wa1nca
Yes its called a growler
https://en.wikipedia.org/wiki/Growler_% ... _device%29
Hard to find a shop with one today
Any good motor/generator repair shop should have one but most shops today dont test and rewind generators
If you cant find a local shop to test for you
I will test yours with my growler
Re: R27 GENERATOR HELP PLEASE
Posted: Fri Dec 11, 2020 12:30 pm
by 312Icarus
Growlers show up on Ebay fairly frequently. Some old time auto shops should still have one kicking around they may lend you.
Icarus
Re: R27 GENERATOR HELP PLEASE
Posted: Fri Dec 11, 2020 12:50 pm
by schrader7032
Vintage airports? Something to service older magnetos?
Re: R27 GENERATOR HELP PLEASE
Posted: Tue Jan 05, 2021 10:29 pm
by Rodolfo850
Take a look at this link...
https://www.snafu.org/restore/uandm_bmw_v1.pdf Understanding BMW /2 electrics explains very well how generator works and how to test.
Start by cleaning rotor contact points, check brushes and springs, check free movement of brushes.
This books describes how to revive a generator that lost polarity, given a shot of voltage that magnetize again the coils..
let me know if need help on step by step test.. I restore mine rotor and coils on my r27's and r60/2.
regards
Rodolfo
Re: R27 GENERATOR HELP PLEASE
Posted: Mon Feb 22, 2021 10:38 am
by bimmerwork
Thanks for the offer to test my R27 generator with the Growler. i'm waiting to get it back from a local shop that could not find where the fault lays.
I'll contact you after I check something else myself.
Thanks again, Will
Re: R27 GENERATOR HELP PLEASE
Posted: Tue Feb 23, 2021 9:05 am
by wa1nca
Ok good luck
Can test for you if needed
413-628-3958 leave message with your contact info
I live in Massachusetts
Tommy
Re: R27 GENERATOR HELP PLEASE
Posted: Tue Feb 23, 2021 2:30 pm
by malmac
Rodolfo850 wrote: ↑Tue Jan 05, 2021 10:29 pm
Take a look at this link...
https://www.snafu.org/restore/uandm_bmw_v1.pdf Understanding BMW /2 electrics explains very well how generator works and how to test.
Start by cleaning rotor contact points, check brushes and springs, check free movement of brushes.
This books describes how to revive a generator that lost polarity, given a shot of voltage that magnetize again the coils..
let me know if need help on step by step test.. I restore mine rotor and coils on my r27's and r60/2.
regards
Rodolfo
Now this looks really interesting.
Electricity is something I am very inexperienced with, but more insight into what you do to rewind these old parts would be much appreciated.
never say never. Who knows I might get around to doing this.
Mal