Farm Equipment - 185 alternator draining batteries

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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: 27 Apr 2025 at 7:13am
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Topic: 185 alternator draining batteries

Posted By: automaticdave
Subject: 185 alternator draining batteries
Date Posted: 26 Apr 2025 at 1:06pm

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

Replies:

Posted By: steve(ill)
Date Posted: 26 Apr 2025 at 1:22pm

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.

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

Posted By: steve(ill)
Date Posted: 26 Apr 2025 at 3:45pm

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.

Posted By: JC-WI
Date Posted: 26 Apr 2025 at 4:32pm

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."

Posted By: automaticdave
Date Posted: 27 Apr 2025 at 7:10am

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