Super A Regulator Change and Charging - for Brian2

(System won't let me reply to the original post...)

----

Brian - All sounds normal. The ammeter behavior you describe simply means the voltage regulator is doing its job.

The only (minor) irregularity is the observed 10 amp maximum charging current. With anything less than fully charged battery you should see closer to 15 amps at full RPM. This means the generator's 3rd brush may need adjustment:

First use a jumper wire to temporarily ground the regulator's FLD terminal. Now run the engine at full throttle and note the ammeter reading. If is 15 amps or more, do nothing. However if it's LESS than 15 amps, loosen the 3rd brush clamp screw on the back of the generator. Now rotate the 3rd brush a bit closer to the nearest fixed brush, tighten the screw and test again. Repeat if required until you see 15 amps on the ammeter at full throttle.

Bob M

Bob, if we had that genny we would probably clean n brighten up his commutator and exercise n light lube as necessary his brush hold down springys and insure good genny and VR grounds and a good tight belt I betcha........

John T

Yes indeed John T!!

There areseveral earlier threads that remind me of breakfast cerial (Post Toasties) JimN

Yeah Jim - what's up with that anyway??

The Tech here indicates that the filter on the system server at YT has a corrupted file that has blocked "normal text" messages from being sent to posts (within a range) that contain a path to that corrupt file. (We have pretty good techs on our University Help desk) Jim

As always thanks for the responses, really appreciated. When I had the voltage cutout on, it would only change at 10 amps, so I wasn't surprised at it doing the same with the regulator. I did adjust the third brush to the max level, and this is all she puts out. The third brush is in fact cracked which I assume would effect performance, but I'm assuming its been cracked for a long time. I did some reading on Delco regulators and one of the pages I found was from a Harley site. I felt it was an interesting read but unsure if it applies to the type of regulators on our tractors too. They show a 2 unit, and 3 unit model, where both used on tractors? I put the link below for anyone who is interested.

So if my regulator is working correctly. Why does the charge drop off at high RPM, but then start charging at 4 amps at low RPM ? Why does RPM matter? The fact that a high RPM it just drops to nothing like it "cut out" makes me curious and leads me to believe that the cutout point is too low ? One other thing that I didn't do when I installed the regulator was to re-polarize the genny, was/is that a no no even though it seems to be charging ?

Thanks again for all the responses, I avoided the electrical components of this tractor, now I am quite enjoying my learning experience.

Brian.
Interesting read on Delco Regulators

With your hydrometer what is the cell readings as that will tell ya if the battery is being charged correct.