Manky Monkey Motors

Technical Section => General Tech => Topic started by: TwistedPatience on July 01, 2009, 08:55:26 PM



Title: How to change the polarity of a dyno?
Post by: TwistedPatience on July 01, 2009, 08:55:26 PM
Mate of mine has an old BSA A7 I think and he needs to change the polarity from + earth to negative earth, any one?

I know this can be done by flashing but for the life of me I can't remember how.


Title: Re: How to change the polarity of a dyno?
Post by: voodoo on July 01, 2009, 10:20:19 PM
Oh sheesh I used to do this about 20 years back on Classic cars I had......will have to try to kick start my brain...Voodoo..


Title: Re: How to change the polarity of a dyno?
Post by: tbone on July 02, 2009, 07:57:05 AM
Fit the dynamo in place, but dont connect the leads, then connect a large cable from the positive side of the battery and touch it several times to the terminal on the dynamo marked F, you`ll see a small harmless spark, hi ho and away you go.
OOOh happy memories of times gone by.


Title: Re: How to change the polarity of a dyno?
Post by: voodoo on July 02, 2009, 07:57:51 AM
Yeah thats the one lol


Title: Re: How to change the polarity of a dyno?
Post by: TwistedPatience on July 02, 2009, 12:05:54 PM
Thanks TB I knew someone would remember ;D


Title: Re: How to change the polarity of a dyno?
Post by: tbone on July 02, 2009, 03:32:11 PM
 ;)


Title: Re: How to change the polarity of a dyno?
Post by: morrag on July 02, 2009, 04:55:44 PM
But don't do it with the motor running, and driving the Dynamo! Morrag


Title: Re: How to change the polarity of a dyno?
Post by: yanto on August 12, 2009, 09:55:53 AM
takes me back to my cortina mk1 loved that car 8)


Title: Re: How to change the polarity of a dyno?
Post by: nabsim on September 05, 2009, 04:11:18 PM
Just borrowed your answer tbone, someone was asking that exact question on btw forum. Credited you and this post though ;)


Title: Re: How to change the polarity of a dyno?
Post by: tbone on September 05, 2009, 05:17:50 PM
No problem sir. Always happy to spread my stoopidness  ;D, and as long as the triple M site gets credit for any info used from it then i`m happy.  ;)


Title: Re: How to change the polarity of a dyno?
Post by: Manky Monkey on September 06, 2009, 08:21:41 AM
Thanks TB, but it's your cleveryness, we just show it to the World.