Farm Equipment - D15 series 1 electrical

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D15 series 1 electrical

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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=169626
Printed Date: 25 Jun 2024 at 10:21pm
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Topic: D15 series 1 electrical

Posted By: Tracy Martin TN
Subject: D15 series 1 electrical
Date Posted: 30 Mar 2020 at 6:26pm

What would cause system to not charge battery if regulator and generator are working? Can a wire on or near amp gauge cause this? Thanks Tracy

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No greater gift than healthy grandkids!

Replies:

Posted By: Boss Man
Date Posted: 30 Mar 2020 at 7:03pm

wire or bad amp gauge

Posted By: DSeries4
Date Posted: 30 Mar 2020 at 8:20pm

I have seen many old ammeters crap out. Start there. If not, have a good look at your wiring harness.

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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080

Posted By: MACK
Date Posted: 30 Mar 2020 at 9:03pm

How do you know generator and regulatory are working? MACK

Posted By: TimNearFortWorth
Date Posted: 31 Mar 2020 at 7:39am

Tracy, I had a 15II that had me stumped.

Re-worked gennie, all new good quality gauges and even changed out the VR as new wiring harness to boot and I wanted to start fresh.

Would run a new battery down with normal use and had to keep charging it.

If you had the battery out of it since or even unhooked the terminals it will need re-flashed with a jumper wire and the 3rd time I flashed it, she charges pretty darn good and can sit for months and fire right off.

Any time I unhook a battery on a gennie unit, I re-flash em' anymore.

Posted By: bleeds orange
Date Posted: 31 Mar 2020 at 9:52am

Hey tim I guess you could help with "reflash" how and what do you do? Be useful information for future.

Thanks cory

Posted By: Tracy Martin TN
Date Posted: 31 Mar 2020 at 9:57am

Mack, had them off and checked twice. New rebuild and new regulator. Charged on bench. Thanks tracy

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No greater gift than healthy grandkids!

Posted By: bleeds orange
Date Posted: 31 Mar 2020 at 9:48pm

Hey tim I guess you could help with "reflash" how and what do you do? Be useful information for future.

Thanks cory

Posted By: TimNearFortWorth
Date Posted: 01 Apr 2020 at 9:30am

With batt charged up and hooked to tractor, use a jumper wire to flash across the F (FIELD) terminal on VR, to the positive post on battery. Should see a spark when you touch it to the F terminal on the VR, only takes a second.

Can also flash by using a short wire between the F and B (battery) terminals on the VR.

This is typically required whenever the battery terminals are removed on the battery as in replacing/changing battery and I have had good luck doing it on batteries that have been run down completely that I have charged back up in the tractor.

Sometimes needs to be repeated occasionally on old systems.