WD not charging
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=139659
Printed Date: 29 Dec 2025 at 7:28pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: WD not charging
Posted By: Carl(NWWI)
Subject: WD not charging
Date Posted: 21 Jun 2017 at 7:53pm
I've gotten myself into a head scratcher and hoping someone else has ran into this.
12v negative ground with generator and regulator. Will only charge with the cover off of the regular, put the cover on, amps and voltage both slowly drop til no charge, remove cover, amps and volts climb back up. Figured faulty regulator, (was brand new out of box). Ordered another one, does the same thing. With wires unhooked and gen full fielded it charges 27v.
I'm out of ideas.
Carl
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Replies:
Posted By: Sugarmaker
Date Posted: 22 Jun 2017 at 7:24am
I hate electrical issues, so I am not going to be a good source. But Gerald or Steve should be along soon to help.
My guess would be a bad ground, but that's just a guess. Seems that the cover should have nothing to do with the charging rate whether on or off.
Good luck. Reminds me I have a defective key switch on a WD that needs replaced. I have not found a good weather proof one yet.
Regards,
Chris
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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.
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Posted By: Carl(NWWI)
Date Posted: 22 Jun 2017 at 11:30am
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I know, it doesn't make any sense at all. I've seen my fair share of wierd electrical issues, but this is a good one!
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Posted By: Bill_MN
Date Posted: 22 Jun 2017 at 1:45pm
Does it have a metal cover? Seems to me the older ones had bakelite covers and many newer ones have plastic covers so it's not an issue, but if something's touching the inside it might be bleeding off current to ground if it's metal.
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1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow
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Posted By: Brian Jasper co. Ia
Date Posted: 22 Jun 2017 at 4:24pm
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It can't hurt to buff the grounds or even add a dedicated ground wire to the regulator. This is a different one for sure.
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"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
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Posted By: Steve in NJ
Date Posted: 22 Jun 2017 at 6:25pm
Install a good clean ground off the chassis of the VR. Usually, there's a little 8-32 screw in the side of the unit. Use that screw. If the chassis doesn't have a screw, attach a good clean ground to the foot on the field side of the VR. Should be good ta' go.....
Steve@B&B
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Posted By: Carl(NWWI)
Date Posted: 22 Jun 2017 at 9:03pm
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Cleaned grounds, and tried grounding vr to frame, did not make a difference.
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Posted By: Brian Jasper co. Ia
Date Posted: 23 Jun 2017 at 1:11pm
Just for giggles, put the cover on loosely first, then see if tightening the cover bolts has an effect. The land of almost right can build a lot of stuff wrong before someone tells them they're doing it wrong.
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"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
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Posted By: Carl(NWWI)
Date Posted: 23 Jun 2017 at 11:21pm
I tried that too!! Lol. Heck, I even held the cover half way on and it still wouldn't charge, it has to be all the way off! The craziest thing, I don't understand.
Thanks for the help tho guys, I tried what everyone said, finally just called car quest and they said they would Warranty both regulators and get me a mini 40amp single wire alternator. Can only fight something for so long. Haha
Carl
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Posted By: Brian Jasper co. Ia
Date Posted: 24 Jun 2017 at 12:53pm
What did they ding you for the mini 40?
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"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
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Posted By: Carl(NWWI)
Date Posted: 24 Jun 2017 at 9:14pm
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I think it was $150 if I remember right from the last time they priced one for me. But after $80 for the regulator and 3 wasted nights, I felt the $150 was very justified. Lol
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