Yes, I made this upgrade to my 5U D2 a couple of years ago. I'm using the original 6v generator with a Optima 6v AGM battery and the regulator is a Clover Systems DR110, which bolts on to the same location as the original regulator and has the same connections. It works perfectly - the generator easily keeps the battery charged even though it only runs a couple of times per year.
Look it up online at cloversystems.com
looks like that website is closed. im looking for a 12 volt solid state electronic voltage regulator for the generators on these tractors. im tired of cleaning the points on them. anyone out there done this??
Try this email and see if it gets through. I contacted Gordon this time last year for some info
[email protected]
They were also offering 12v regulators