Charge issues

ICOM 756 · #1 07-01-2021, 08:56 AM

ok i have 2 S/Gs and 2 VRs. the charge gauge pegs after about 5 to 10 mins of run time at high end of rpms. with volt meter on batt showing floating to 16 sometimes 17. one VR floats around 15 to 16..

the 2 VRs are 4 tab. i see on the 3 front/side facing tabs if you will.. the letters.
so i have 2 out of the 3 front or side tabs hooked up... 1 to bat 1 to field. the 3rd is L so i guess that is load or lights or the 500 watt stereo lol .. joking
tab under the VR goes to A on the SG ? inside terminal or the one close to the motor..

kind of wish someone who knows these real good .. could make a video lol....
videos for almost everything else on these ole boys.

i followed the wiring on the sites traced all wires. ohm and conduit on the ohm meter.. you know touch one end and then ground to check for shorts. nothing. and both ends to make sure i have right wire goin to right spot.

wonder also how long they hold Polarizing???

iam sort of lost after all that..

R Bedell · #2 07-01-2021, 09:16 AM

What tractor(s) are you working on ??

ICOM 756 · #3 07-01-2021, 09:29 AM

Quote:

Originally Posted by R Bedell

What tractor(s) are you working on ??

they are 127s..

ironman · #4 07-01-2021, 09:38 AM

Are you talking about two different tractors doing the same thing with two different batteries or are you swapping things around from one to the other?
It sounds like you are wired correctly but that being said your post is about as clear as chocolate milk!

R Bedell · #5 07-01-2021, 09:49 AM

You have the wrong V/R for the 127. Assuming you are using the older 4 terminal V/R used on the 70/100 series, DON'T use the "L" terminal.

Here is the 127 Charging Circuit. Make sure the wires are connected correctly AND you have a good ground.

ICOM 756 · #6 07-01-2021, 10:10 AM

Quote:

Originally Posted by ironman

Are you talking about two different tractors doing the same thing with two different batteries or are you swapping things around from one to the other?
It sounds like you are wired correctly but that being said your post is about as clear as chocolate milk!

i know i suck at texting stuff lol

2 SGs 2 VRs on one tractor...

i think i found the issue but before i say... ill run it more
ran it for 30 mins with and without blades...
floating 13 to 17. amp gauge showing one needle width off 0 .. lil floater on it on lower rpm .. not peged like before..

yes i did something but ill wait and see if its said .. lol

ICOM 756 · #7 07-01-2021, 10:13 AM

Quote:

Originally Posted by R Bedell

You have the wrong V/R for the 127. Assuming you are using the older 4 terminal V/R used on the 70/100 series, DON'T use the "L" terminal.

Here is the 127 Charging Circuit. Make sure the wires are connected correctly AND you have a good ground.

when bought they had the 4 term VRs. also a 147 . but same wiring as we know..

the L is empty. just B F and A underside..

i think i found the issue.. ill give hint.. i did put new term post on the SG. nope wasnt shorting.. but i pulled the coils out of the casing of the SG to do the new post.. nope coils are fine inside. no shorts..
might give a hint..

R Bedell · #8 07-01-2021, 10:16 AM

Quote:

i did put new term post on the SG. nope wasnt shorting.. but i pulled the coils out of the casing of the SG to do the new post.. nope coils are fine inside. no shorts..

Nothing was said in the original post about you servicing the S/G's.

ICOM 756 · #9 07-01-2021, 10:41 AM

Quote:

Originally Posted by R Bedell

Nothing was said in the original post about you servicing the S/G's.

i learned something new lol... new clue every time you work on them or disconnect them.. they need to be re-polarized.

i think .... that was issue.. i did the short A to battery while running . just touch .. spark done..
seems OK now..
floating 13 to 16.5 sometimes 17. but it isnt running away on the voltage now..

ironman · #10 07-01-2021, 12:57 PM

Quote:

Originally Posted by ICOM 756

i learned something new lol... no clue everytime you work on them or discontect them.. they need to be repolerized.

i think .... that was issue.. i did the short A to battey while running . just touch .. spark done..
seems ok now..
floating 13 to 16.5 sometimes 17. but it isnt running away on the voltage now..

It has always been my understanding that starter/generators, as opposed to generators, do not have to be manually polarized.
When you did what you thought was repolarizing by touching the S/G "A" terminal to battery plus, it is done automatically the first time you hit the starter solenoid as you can see in the wiring diagram.
So, your problem may be solved, but not by "re-polarizing".
By the way, on a 4-lug regulator, the post on the bottom is the equivelent of the "GEN" lug on 3-lug regulators. The "L" lug (or Load) on 4-lug regulators is for providing greater current to high drain loads such as lights or other accessories.

In addition, if you are seeing 16-17 volts and and consider that "isn't running away on the voltage now", how much would you consider to be "running away"?