From: Steve & Jeanne Keith (cckw@comcast.net)
Date: Fri Mar 10 2006 - 14:33:46 PST
Alternators contain (usually) 6 heavy duty silicone diodes. Diodes act as
one
way valves and let current pass only in one direction. In the other
direction,
they block the flow of current.... or most of it. All diodes have a reverse
leakage current specification. In other words, they draw a little current
from
you battery(s) when the engine is not running. Over a period of time, they
will discharge your battery if left connected and the engine un-run.
My 151A2 had what I thought was an alternator problem drawing the battery
down. It actually may have been the starter switch which can get to the
point
of actually passing enough current to spin the starter fast enough that you
can
hear it! Anyways, I installed a battery disconnect switch in the top side
cover
of the battery cover so that it was facing me. With anything in the middle,
you
could not see it so it also doubled as an anti-theft/tinker device at shows.
Steve AKA Dr Deuce
PS: Generators do not have diodes. They use the commutator and a relay. When
off, there is not leakage drain on the batteries
See http://www.cckw.org/Alternators_Generators.htm
----- Original Message -----
From: "Stu" <stuinnh@mvnut.us>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Friday, March 10, 2006 4:04 PM
Subject: Re: [MV] *SPAM* Re: [MV] Mutt Batteries 6TL
> That had nothing to do with my question. You don't charge batteries while
> cables are connected.
> Which military alternator are you talking about? 151A1? 151A2? M35?
> M38A1? M38? M1009? M1008? MB?
> My batteries only go dead after months sitting during winter, so I don't
> know what you are talking about. Are you new to this group?
>
> "Stu" Southern, NH USA
> "Live Free Or Die; Death Is Not The Worst Of Evils"
> MVPA #14790
> 1967 M151A1 Jeep 1964 M416 Trailer
> 1985 M1008 CUCV Pickup
>
>
>
> -----Original Message-----
> From: Military Vehicles Mailing List [mailto:mil-veh@mil-veh.org] On
> Behalf
> Of MISTYMTN
> Sent: Friday, March 10, 2006 2:37 PM
> To: Military Vehicles Mailing List
> Subject: *SPAM* Re: [MV] Mutt Batteries 6TL
>
> Hello -- I've been informed the military alternator
> will draw current even while sitting.
> I've been advised to get a "battery disconnect"
> & mount on batts to eliminate this draw.
>
> Take care -- CRC
>
> ----- Original Message -----
> From: "Bruce C. Beattie" <bruce@eecs.berkeley.edu>
> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> Sent: Wednesday, March 08, 2006 12:23 PM
> Subject: Re: [MV] Mutt Batteries 6TL
>
>
>> Hi Stu,
>> If I am understanding this correctly, you have charged the battery and
>> then removed the
>> charger(although this is not necessary, since you will still get the same
>> symptoms). Now you are trying to attach the neg cable to the battery and
>> you are getting a spark.
>> What this means is that there is something in your wiring that is
>> completeing the circuit from your positive
>> terminal to your negative terminal. This is probably what drained your
>> battery.
>>
>> it could be a device left connected, a ground or a short someplace in the
>> wiring.
>>
>> Bruce MVPA 23824
>>
>>
>> Stu wrote:
>>
>>>I put 2 new dry charge military batteries in my Mutt last summer. While
>>>Mutt stored for winter they went dead. I put a 12v charger on to one of
>>>the
>>>batteries, and with + cable attached to battery, I am getting sparks from
>>>the neg terminal when I put on the cable. Should it be doing that?
>>>
>>>
>>> "Stu" Southern, NH USA "Live Free Or Die; Death Is Not
>>> The Worst Of Evils" MVPA #14790
>>>1967 M151A1 Jeep 1964 M416 Trailer 1985 M1008 CUCV Pickup
>>>
>>>
>>>
>>>
>>>
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>>>
>>
>>
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>>
>
>
>
> ===Mil-Veh is a member-supported mailing list===
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>
>
>
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