The Fordson Tractor Pages Forum

Hi,

I have checked my voltage regulator.
At idling it's minus 3 A and 12.5 V
Whit about 800 rpm the cut out opens and it gives 0 to plus 3 A and a bit more volts.
Whit 1800 rpm it gives plus 20 A and 16 V. When I switch the light on it gives 11 A.
Are these figures right?
And if not what do I have to adjust.
I understand the voltage adjusting screw, but can't figure out what you can do with the cut out screw.

The figures look about right Henk apart from the amps. Has your tractor been fitted with a new regulator / dynamo as you should not be able to get 20 amps, the maximum should be 11 amps.

22 amp dynamos have an open back, 11 amp ones are sealed.

Brian,

It's fitted with a new regulator with 5 connections as original.
The dynamo is original.
The 20 amps were bothering me.
How can I adjust that?

There must be a topic about this subject but I can't find it.
I remember talking about the 11 or 20 amp versions.

Is this the one you mean?

http://www.fordsontractorpages.nl/phpbb ... php?t=2323

Yes Gavin, Thank you. I was looking in the Major forum instead of the Dexta.

I figured it out. I was thinking the wrong way.
First of all, the minus 3.2 A was because my fertiliser was connected and therefore my brake lights were on. Disconnected that and it was zero.
I thought the right-hand screw was for the level of the voltage and the left-hand for the Amps.
Now I know the left one is for the point were the dynamo is connected to load the battery.
The volt screw is also for the max amps. It was a bit searching but found the right position.
Now it loads 11 Amps with 16 Volts at speed higher than 1000 rpm. Comes in at 650 rpm and gives about 2 or 3 amps. With more than 1200 rpm it keeps loading even with the lights on.
A college told me ones the Volts should not be more than 13.5 V so I have adjust the regulator to that voltage. But every time my battery was losing after a day riding.
I hope that’s taken care of now.

Sometimes a bad connection will cause a "leak" as the full power from the generator will not reach the battery at it's fullest peak. The voltage reading will be high if this is the problem. Check and clean all the connections from the Dyno connection all the way back to the battery. Also, the battery cables and connections must very clean and snug. In systems utilizing an alternator, 14 -16 volts is not uncommon. Dandy Dave!