AC D19

need air cleaner tube · Jan 26, 2013

I have several old tractors which I modernize, and use, nine of which are AC, my favorite. No matter the brand, I modernize the hydraulics,change them to negative ground, install alternators and seldom have any trouble. Changing them to negative ground greatly simplifise any problems jump starting them or using them to jump start another engine. Make em all the same, old or new. However my D19 occasionaly gives battery problems. Due to space and power steering considerations, I must leave the negative grounded generator in place. I buy a new regulator and it charges just fine for a month or two and then the regulator points burn and it stops charging.(time for a new regulator) I go through far too many regulators. Any thoughts on what to do to solve this problem?

rufus80 · Jan 27, 2013

Did you polarize the regulator to the generator? Using a jumper wire from the bat terminal to the generator terminal touch both for a split second amd you will see a small spark, it is now polarized.

rufus80 · Jan 27, 2013

Also check your ground. I had a charging issue one time because the surface that the regulator sits on was not clean.

gatz · Jan 27, 2013

...along with the ground issue;
I ran a separate ground wire in the same bundle as the charge wire from the regulator to near the starter solenoid and fastened the terminal to the torque housing on my D17; thus avoiding the possibility that the tinwork/paint wouldn"t provide good conductivity.

Bob Bancroft · Jan 27, 2013

Back when I worked at an AC dealer in the 70's, I did a lot of service calls on elec. issues. Even then I was unhappy with new points. Especially cut-outs. Couldn't seem to get decent ones.
I recently got a D15II and in fixing it up I switched it to neg. ground. The VR was acting up. I couldn't find aftermarket with the same configuration. So I swallowed hard and paid the big $$$$ at Agco. So far so good! Maybe I just got lucky.

need air cleaner tube · Jan 28, 2013

Thanks fellows! Yes I have polarized the reg/gen with a short wire. The regulator on a D19 is in a curious place up over the engine and up next to the radiator. I am going to move it to the rear of the engine and down low. I will also run a separate ground to the battery ground as rcommended.If this does not work, I will try to find a way to move the power steering pump and then find space for an alternator.

need air cleaner tube · Feb 15, 2013

Thanks fellows for all the help. I have revamped the charging system by purchasing a new after market voltage regulator. I moved the regulator location from the extremely warm location high and near the radiator. I moved it down low and behind the engine. I ran a separate ground wire from the generator to the regulator. Then I ran another separate ground wire from the regulator to the battery ground. I works well so far. I am hoping a poor ground was the biggest problem.

AC D19

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