185 alternator draining batteries
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=206443
Printed Date: 19 Jul 2025 at 4:36am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 185 alternator draining batteries
Posted By: automaticdave
Subject: 185 alternator draining batteries
Date Posted: 26 Apr 2025 at 1:06pm
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Why is the field terminal always HOT even when the wire is disconnected and ignition off killing the batteries over nite? 1100887 55A delco. Thanks Dave
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Replies:
Posted By: steve(ill)
Date Posted: 26 Apr 2025 at 1:22pm
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the HOT WIRE to the battery is probably always hot.... You might have a small leak internal that goes to ground... that could keep the F terminal warm..
Disconnect the battery cable terminal should work...
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Like them all, but love the "B"s.
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Posted By: automaticdave
Date Posted: 26 Apr 2025 at 1:38pm
Sorry I worded that wrong ! The F terminal is causing a Draw. My bad, Dave
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Posted By: steve(ill)
Date Posted: 26 Apr 2025 at 3:45pm
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you have an external voltage regulator... are you thinking the contact INSIDE the voltage regulator is STUCK closed and causing a draw when you connect the Field wire ?
Maybe the REGULATOR and not the Alternator ?
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Like them all, but love the "B"s.
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Posted By: JC-WI
Date Posted: 26 Apr 2025 at 4:32pm
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Could be a shorted diode in the alternator or contact in regulator welded to hot post. or connectors put on wrong terminals... 55 amp alternator means that tractor has a different alternator put on. Original was 32 amp alternator.
Is that 1100887 alternator still the old Delcotron style? no regulator inside it...?
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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."
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Posted By: automaticdave
Date Posted: 27 Apr 2025 at 7:10am
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Steve & JC-WI, yes it is a older Delcotron alternator, draw is happening with regulator disconected, will pull & open Alt & test diodes n other stuff, Thanks Dave
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Posted By: Lynn Marshall
Date Posted: 27 Apr 2025 at 8:35am
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I believe that the 10dn Delco alternator can be bumped up to a 55 Amp by just using the heavier windings. Seems like I put some 72 Amp windings in a 200 once for cab,AC, and planter blower fan load. I would suspect a bad diode is causing the field terminal condition. There's not much to those alternators, stator, windings, brush set, and two sets of diodes.
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Posted By: DSeries4
Date Posted: 27 Apr 2025 at 10:50am
Contacts are probably sticking on the voltage regulator
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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
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Posted By: automaticdave
Date Posted: 27 Apr 2025 at 4:04pm
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Bad voltage regulator was what got me all excited yesterday, l didn't have new one but had a newer style alternator with the internal regulator on the shop shelf that I had rigged up as a spare for one of the 8010's if needed in a pinch, jumped the field wire to the ignition switch and all is good, tack don't work very good but I can live with that for a while. Thanks Dave
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