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automaticdave 
Silver Level
Joined: 20 Jan 2011
Location: Granton, ON
Points: 249
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 Topic: 185 alternator draining batteries
Posted: 23 hours 37 minutes ago 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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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 85513
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Posted: 23 hours 21 minutes ago 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.
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automaticdave
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Joined: 20 Jan 2011
Location: Granton, ON
Points: 249
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Posted: 23 hours 5 minutes ago at 1:38pm |
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Sorry I worded that wrong ! The F terminal is causing a Draw. My bad, Dave
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
Points: 85513
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Posted: 20 hours 58 minutes ago 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.
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JC-WI
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Joined: 11 Sep 2009
Location: wisconsin
Points: 34193
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Posted: 20 hours 11 minutes ago 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."
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automaticdave
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Joined: 20 Jan 2011
Location: Granton, ON
Points: 249
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Posted: 5 hours 33 minutes ago 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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Lynn Marshall
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Joined: 13 Sep 2009
Location: Dana, Iowa
Points: 2342
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Posted: 4 hours 8 minutes ago 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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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7434
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Posted: 1 hour 53 minutes ago at 10:50am |
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Contacts are probably sticking on the voltage regulator
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