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6 volt charging issues

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italianmotor View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote italianmotor Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2015 at 17:51
I took it off, and opened it up - seemed like new inside. I cleaned up the contacts and checked the capacitator wire (?) was ok, which is was, as far as I could tell. Put it back together, bolted it back on, and checked the voltage again with bike running - still over 8 volts at higher revs, though I am doing this with no headlamp bulb as it's broken. So I'm none the wiser really..



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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2015 at 19:38
take a look at the site "How To" pop in the question "How to adjust a voltage regulator" If I remember correctly you adjust these by the spring pressure on the contact , but Mike H may know better it has been a long time since I played with one of these Maybe one of the classic car clubs may help moggie minors used one similar I was shown as an apprentice how to adjust these BUT worth checking with the bulb resistance in there too buddy ....Mike am I loosing my marbles?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Scousus maximus Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2015 at 20:07
Does it have any kind of screw or cam adjustment on the voltage coil? If so then you might be in luck and be able to adjust it using very small adjustments and a good digital voltmeter.  If no screws then it's done by adjusting the relative spring tension on the contact plate.Again, very small adjustments required. Some more pics and model number would be a help.
It's almost certainly possible to fit an electronic version in the original box,,,,you can buy them as a complete, already boxed unit but they are not cheap, far better to fit them yourself.
Also consider just fitting the modern unit out of sight somewhere, with airflow, and just keep the old box for looks.
Out of curiosity, what UNREGULATED voltage can you get if you over ride the coil by putting a piece of paper between the contacts and revving the engine? (only for a second or two). You might be able to get 12 volts out of it as a "free" advantage. I always like free.Wink

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jerry atric Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2015 at 22:07
That's looks very like the Lucas regulator fitted to just about all Brit bikes with dynamos. I don't know anyone who has kept them once they give trouble. Electronic ones are pretty cheap and fit in the casing. Fit and forget. Several places do them, AO in Thetford is one, he's pretty helpful too. It's all the same basic system, British or Italian.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2015 at 22:42
Yes, it's worth talking to Alan Osborn, he knows a lot about this sort of thing.
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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2015 at 23:11
Originally posted by Ken-Guzzibear Ken-Guzzibear wrote:

....Mike am I loosing my marbles?
  
Don't think so .. LOL
  
Looks like the contacts are besides the coils, any adjuster screws around there?
 
 
 
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italianmotor View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote italianmotor Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 09:38
Thanks for all the help. I didn't really see any adjusters, but I've also put it all back together now so will have to take it off again to check. I think at this point I'm in favour of fitting something modersn. I contacted Alan Osborn who said he has a regulator that would work, but it's wired for Lucas systems, so, seeing as the dynamo on the Guzzi is a Bosch, and that that I would need to ;

"Move the Field connections to obtain Lucas, but occasionally by inspection you can see it would be easier to move the brush connections. It is the relationship between these windings that is crucial. Open the Dynamo end cap and locate the two Field wire connections, they usually disappear inside the case.  Disconnect them and move BOTH the wires. The one that was on the output D (or D+) terminal must become connected to the F terminal. The wire that WAS on the F terminal should then be connected to EARTH within the dynamo. You must move both Field wires to retain the relationship between the Field and the Armature.

Now please re-polarise the Dynamo and test for output (with a lamp) as per the instructions with the V-Reg. If for some reason you do not achieve an output then please check your work and perhaps resort to a Multimeter to check resistances."

Mmm, sounds a bit complicated!

Or would this do the same job?: http://www.vmccshop.net/p/5310/solid-state-regulator-negative-wassell
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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 18:31
Seems a lot of faffing to me... either options! Surely reg can be adjusted somehow even it it's only a case of bending a tab or something...
"Chicken nuggets don't dance on a Tuesday."
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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 18:51
The adjustment is I think by the tension on the spring no that difficult BUT requires practice
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italianmotor View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote italianmotor Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2015 at 19:28
So carried on with all of the above, bought a regulator, wired it up as instructions, but am getting stumped at this part. "

"The wire that WAS on the F terminal should then be connected to EARTH within the dynamo."

What does this mean, within the dynamo? Anyone any clues?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2015 at 23:17
Doesn't make any sense to me.
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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 05 Feb 2015 at 16:10
Me neither! Any drawings?
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