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6 volt weird issues Lodola

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Jezguz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jezguz Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2016 at 11:56
Their postage costs seem a little on the high side, £72 for UK postage and they are based in Fareham!!
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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: 19 Aug 2016 at 19:23
Still getting nowhere. Had a look today, now, it's just blowing the inline fuse just after the battery - it's as if there's a massive short somewhere, so I can't even run it to check anything else. I've checked the ignition switch again and it seems clean and fine. Very frustrating. I might have to rewire it.
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 19 Aug 2016 at 20:47
Do you have means to measure resistance?
There must be a short somewhere, but finding it can be a problem. Frayed insulation on old wiring is favourite.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote italianmotor Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2016 at 09:23
Yes Brian, I've got meters and so on, just not sure where to start. I've been looking fior chafed wiring but found nothing yet. Seems to me the issues have always come from the regulator originally.
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2016 at 09:29
Remove the fuse that blows and measure resistance from the non live side to earth. Probably very low or more likely zero.
Can you then work along that wire/circuit and isolate anything then measure again?
I would work out along the circuit measuring each branch until I could isolate the culprit. Much easier said than done of course.
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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: 26 Aug 2016 at 13:30
What a relief - I've finally found the problem(s) by pulling the wiring loom off the bike bit by bit and checking every section, and as you can see from the photos, there's no wonder it all just stopped working. In fact it's amazing that I've been able to ride it as often as I have the last couple of years! There is a section of the loom that passes down between the oil tank and the battery box to feed the points, dynamo and brake light switch on the r/h side of the motor, so this passes underneath the swinging arm and therefore has a point of stress there - mind you, the loom lasted 60 years, even with the obvious repairs made sometime in the past, so not bad going for the famous dodgy Italian electrics.

At first I thought of patching it up, but then I realised I had a new loom that I had bought some while back from Italy, so decided to fit that. Very easy to do, and in fact, it'd also be simple to make up a loom from scratch. The original dynamo is toast, no wonder considering the state of the wires feeding it, so luckily I had a spare from another bike. I also fitted the original regulator.

It now seems that all is fine - starting and charging well, nice bright lights, and running fine. I also took the opportunity to add an oil tap to the oil lines to stop it dropping oil all over the workshop floor. Quick test ride, and all seems well - until the next issue... But, for an old unrestored bike, it still provides much enjoyment. Thanks for all the suggestions. Maybe worth moving this thread to the singles section Brian?






Edited by italianmotor - 26 Aug 2016 at 13:47
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Nick from Kent View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nick from Kent Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2016 at 14:05
Glad you got it fixed. It's worth hanging onto the old knackered dynamo - they're like gold dust it seems! I had mine completely rebuilt at a cost of £160  - still waiting for it to come back though. Making a loom is a doddle.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2016 at 14:51
I must admit, the cause of your problem doesn't surprise me after 60 years.
 
Topic moved.
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red leader one View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote red leader one Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2016 at 15:13
Great stuff.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote theoneandonly Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2016 at 17:14




 the hands of the bodger ??? 
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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: 26 Aug 2016 at 19:15
No, the hands of the person who put the previous Italian bodgery right, you cheeky get. In fact, I really did quite a nice job!

Originally posted by theoneandonly theoneandonly wrote:


the hands of the bodger ??? 
Guzzi lover doing my own thing: http://www.italianmotormagazine.com
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2016 at 21:05
You will have to post a picture of your work now.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote red leader one Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2016 at 15:00
This threads no good without pics.LOL
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nick from Kent Quote  Post ReplyReply Direct Link To This Post Posted: 21 Sep 2016 at 16:17
Adam - as you mentioned earlier, the solid state regulators only work on the Lucas type dynamo. I know this because I forked out 30 quid and found the Wassel type is NG. However, the bloke who rebuilt my dynamo told me that a regulator from a VW Beetle will work with the Bosch type dynamo that we have (which differs from the Lucas in that the field (DF) goes to earth not live) so I got one of those. Ended up using a bosch one from an Aemacchi as the Beetle one is a bit too big to fit under the tank. This one fits and works:

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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: 24 Sep 2016 at 19:31
Well, having run up Kop Hill Climb last weekend, I realised coming back down the hill on the second and last run the Lodola was annoyingly having electrical issues again, as when I braked, seems like the bike just wanted to cut out, which it eventually did not far from getting back to the paddock. I then left it for 15 minutes, and managed to get it going again to get home, which wasn't far and it wasn't dark enough to need lights.

On checking the next day, I found the battery had been 'boiled' a bit, as the electrolyte seemed quite low. I topped it up and put it on charge. Then trying again, found that he bike wasn't charging whatsoever, as if the dynamo had also stopped working. Today, I took the dynamo out and tested it on the bench, and it seems to work fine. I then took the regulator off again, and cleaned the points up, and replaced it, and everything seems to work again. Frustrating! But - I think this old Marelli mechanical regulator is simply unreliable. I checked charging with lights on, and off, and with lights off, at higher revs, it seems to get into the 7.4v/7.5 v zone, which from what I have read, is unacceptable, so this must be the reason the battery is being boiled. I ride the bike often and enjoy riding it, so I want it to be reliable - for an unrestored 60 year-old machine…

So, Nick, thanks for your reference to the Aermacchi regulator. Did you buy it over here or in the States? Don't know how much you paid but I think at this point I don't want to buy another mechanical regulator, so when I have earned a few quid I am going to invest in a modern solid state regulator, the one I mentioned earlier: http://dynamoregulators.com/dvr4.php

There don't seem to be many options left for a Lodola. It's frustrating having two original regulators, one of which doesn't seem to work at all, and one which does work, but seems to allow overcharging making the bike unreliable. Once I've bought it and fitted it, I'll report back.






Guzzi lover doing my own thing: http://www.italianmotormagazine.com
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