re-built dynamo A10

[rockthedog]

hi all. i have just rebuilt my dynamo with a full kit of ebay,i have + earth on my bike ,will i have to flash the dynamo when fitted, if so how do i go about it thank you mal.

[LJ.]

Highly likely you will have to flash it if it is a new rebuilt dynamo as you say. Take out the connections on the F & D of the end cap and take a live wire from the negative - terminal of your battery, then just touch the F terminal on the end cap. One second is enough NO more! Reconnect the F & D wires to end cap and job is be complete. Often dynamos need re-flashing if they are stood unused for a long period of time as the very small residual magnetism fades.

Note: When flashing you will likely see a very small blue spark, this tells you flashing is done. If you should accidently use the positive + then no damage will have been done.

[rockthedog]

Highly likely you will have to flash it if it is a new rebuilt dynamo as you say. Take out the connections on the F & D of the end cap and take a live wire from the negative - terminal of your battery, then just touch the F terminal on the end cap. One second is enough NO more! Reconnect the F & D wires to end cap and job is be complete. Often dynamos need re-flashing if they are stood unused for a long period of time as the very small residual magnetism fades.

Note: When flashing you will likely see a very small blue spark, this tells you flashing is done. If you should accidently use the positive + then no damage will have been done.

thank you will go and try it, will report back thanks again mal.

[rockthedog]

Highly likely you will have to flash it if it is a new rebuilt dynamo as you say. Take out the connections on the F & D of the end cap and take a live wire from the negative - terminal of your battery, then just touch the F terminal on the end cap. One second is enough NO more! Reconnect the F & D wires to end cap and job is be complete. Often dynamos need re-flashing if they are stood unused for a long period of time as the very small residual magnetism fades.

Note: When flashing you will likely see a very small blue spark, this tells you flashing is done. If you should accidently use the positive + then no damage will have been done.

thank you will go and try it, will report back thanks again mal.

all is now well thanks to this forum thanks to you all

[cyclobutch]

Mine quit after being left for just a few days. As you say, a quick flash and it's OK again. Odd?

[wilko]

Yes. Field cores must be leaking! You'll have to seal them up!