D15 no charge showing?
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=210740
Printed Date: 13 Apr 2026 at 7:19pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D15 no charge showing?
Posted By: Tracy Martin TN
Subject: D15 no charge showing?
Date Posted: 13 Apr 2026 at 3:17pm
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I know it has been asked a thousand times but....I charged my battery up. Cranked the tractor after a no start or try Saturday. It has generator and voltage regulator. Never had problem till now. Can i check the regulator while wired to tractor, can it be re polarized, which two post do you flash? How can I see if generator is working while still on tractor? Thanks, Tracy. ------------- No greater gift than healthy grandkids! |
Replies:
Posted By: DSeries4
Date Posted: 13 Apr 2026 at 4:04pm
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BAT and GEN to flash the generator. To check to see if the generator is working, check the voltage on the armature (A on the genny) and ground to the battery ground strap with a multi meter. Should be putting out over 12.5 volts. The generator might be due for a rebuild and good cleaning and a new voltage regulator as well. After decades of use, they do require maintenance every now and then. ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Posted By: steve(ill)
Date Posted: 13 Apr 2026 at 4:37pm
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as Myron said, Ground the "F" terminal of the generator, then with tractor running, check voltage on the "A" terminal..... might show up on amp meter if the wire is good.. ------------- Like them all, but love the "B"s. |
Posted By: Leadoff
Date Posted: 13 Apr 2026 at 4:37pm
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Tracy Martin TN Consider cleaning the contacts/points on the Voltage Regulator - I have found that helps especially after winter idle period Good luck ------------- 1963 D17D Series III. 1965 D15 Series II. 1965 D17 Series IV. 1975 185. 1978 716H. 1979 716H. 1965 780 Harvester/1R&DC. 1957 Model 73 SC 4 Furrow Plow |
Posted By: DiyDave
Date Posted: 13 Apr 2026 at 6:42pm
Also, while you're in the regulator, as you open it up, see if anything that looks like solder drops out. There is a silver wire that can burn off, at about the speed of light, if someone "flashes" the wrong wires... ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |