Farm Equipment - Electrical Gremlins continued...

Print Page | Close Window

Electrical Gremlins continued...

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=9749
Printed Date: 21 Jan 2025 at 6:42pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Electrical Gremlins continued...

Posted By: Sandknob
Subject: Electrical Gremlins continued...
Date Posted: 20 Mar 2010 at 11:40am

I tested both the gen on the d17 last night and one off of my A2 and both are good. Both motored and both slowed down when I grounded out the F lug. So now that limits it to the voltage regulator and/or wiring. I may end up replacing all the wires anyway as they are not real great, but how do I test the regulator, and also if bad where can I get a new negative ground regulator (Tony/SteveNJ do you carry these)?. It has four lugs (three off one side and one off the other)

Thanks

Adam

Replies:

Posted By: JC-WI
Date Posted: 20 Mar 2010 at 12:31pm

Sandknob, be kinda careful and remove the screws that hold the cover on the regulator and looky in. See if contacts are Stuck/welded together. Sometimes if lucky, you can file dirtypoints clean again and they will work. Be careful on all the adjustments in therebecause if you tweek something, it has a drastic change in what kind of out put the generator will charge.

You say the battery was in neg ground, right? If that is the case, take the regulator off and see if it has any stampings on the bottom of the unit stating if its neg or pos grounded.

Glad to hear of your progress so far. Keep it up and you will have it working again. Its nice when things work like they should, specially when you get done doing the work yourself.

Oh, if you pull the light switch on while the tractor is off, does the amp gauge show discharge or charge? If it shows charge, then somebody tossed the battery in backwards. - At least usually when the decision is made to change from pos ground to negative ground the coil wires get switched, and the wiring on amp gauge does too.- But have seen where a fellow marked + - on the tractor by the gauge to show which way the needle ws suppose to go to show charge.

Posted By: Brian Jasper co. Ia
Date Posted: 20 Mar 2010 at 4:32pm

Since we know the generator is OK, check the wires. You've ruled out the generator, now test the wires or replace them if they are questionable. Be sure the connections are clean and tight. I don't know of an actual test for a regulator. If you rule out the Generator and wires, the only thing left is the regulator. You might pull the cover off the regulator and see if the points over the large diameter wire are stuck together. You can try cleaning the points on the regulator. I find a "Roloc" disc on a die grinder does a superior job compared to a file. If you take anything apart, you will need an accurate volt meter to set the charging voltage when you're done.

-------------
"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford

Posted By: Chalmersbob
Date Posted: 20 Mar 2010 at 6:27pm

If you have a generator the battery should be positive ground, not negative. Bob

Posted By: Sandknob
Date Posted: 20 Mar 2010 at 8:18pm

Chalmersbob,

I know the original was postive ground, but you can switch them to negative ground with the correct parts. I was just wondering who carried the correct voltage regulator for negative ground and the vr's are different.

Adam

Posted By: Steve in NJ
Date Posted: 21 Mar 2010 at 7:11am

I have all kinds of VR's in stock. Shoot me the number off the Gennie so I know what the rated output is and I can match up a VR to the system...
Steve@B&B

Posted By: Sandknob
Date Posted: 22 Mar 2010 at 8:29am

Steve,

The model # is 1100305. Can you get that in a negative ground type? What do they run for price?

Thanks

Adam