R27 GENERATOR HELP PLEASE

Post Reply
bimmerwork
Posts: 13
Joined: Tue Jul 31, 2007 2:14 pm

R27 GENERATOR HELP PLEASE

Post 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
bimmer owner since 1968, beemer owner since 1974 (a 1961 R27) several since then... still have the '61 R27 and the '68 2002... have restored many BMW 2002s, 3.0 cs coupes, Isettas, & motorcycles.

User avatar
wa1nca
Posts: 749
Joined: Thu Sep 27, 2012 5:15 pm
Location: Ashfield Ma

Re: R27 GENERATOR HELP PLEASE

Post 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
Attachments
DSC05239.JPG
Tommy Byrnes
54 R51/3 55 R50/Velorex 560 sidecar 64 R27 68 R69US
Ashfield, Ma
USA

312Icarus
Posts: 458
Joined: Fri Jul 15, 2016 1:53 am

Re: R27 GENERATOR HELP PLEASE

Post 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

User avatar
schrader7032
Posts: 7460
Joined: Fri Oct 27, 2006 3:00 am
Location: San Antonio, TX

Re: R27 GENERATOR HELP PLEASE

Post by schrader7032 »

Vintage airports? Something to service older magnetos?
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

User avatar
Rodolfo850
Posts: 10
Joined: Sun May 29, 2011 11:05 pm

Re: R27 GENERATOR HELP PLEASE

Post 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
Attachments
DSC03372.JPG
DSC03371.JPG
DSC03363.JPG
DSC03329.JPG
DSC03226.JPG
DSC03183.JPG

bimmerwork
Posts: 13
Joined: Tue Jul 31, 2007 2:14 pm

Re: R27 GENERATOR HELP PLEASE

Post 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
bimmer owner since 1968, beemer owner since 1974 (a 1961 R27) several since then... still have the '61 R27 and the '68 2002... have restored many BMW 2002s, 3.0 cs coupes, Isettas, & motorcycles.

User avatar
wa1nca
Posts: 749
Joined: Thu Sep 27, 2012 5:15 pm
Location: Ashfield Ma

Re: R27 GENERATOR HELP PLEASE

Post 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
Tommy Byrnes
54 R51/3 55 R50/Velorex 560 sidecar 64 R27 68 R69US
Ashfield, Ma
USA

User avatar
malmac
Posts: 476
Joined: Sun Jun 29, 2014 2:10 am
Location: Toowoomba, Australia.

Re: R27 GENERATOR HELP PLEASE

Post 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
mal - R69s
Toowoomba- Australia

Post Reply