24 volt starer

Comptech

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Really for me it allows me to jump,or power up all but one of my trucks using the NATO slave and cables.The m1031 has my emergency gen set,which is PTO driven.So it has to be readily available to be jumped.Standardized is really my goal.
 

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Ren, allow s me to use any of the military trucks to jump or be jumped universally.My IDI truck is falling into the utility realm here.Would be nice to add a NATO slave to the IDI to match the fleet so to speak.
 

DrCharles

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Don't forget if you're taking 12 volts for lighting & heating loads off the center tap ("bottom" battery to ground), but charging both batteries in series, the batteries will not charge equally...
 

renjaminfrankln

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Ren, allow s me to use any of the military trucks to jump or be jumped universally.My IDI truck is falling into the utility realm here.Would be nice to add a NATO slave to the IDI to match the fleet so to speak.

I get it. Probably the easiest way to achieve this is to wire in series, get a 24v alternator and starter, and run the cab off of a 24v to 12v step down transformer.

As Dr. Charles mentioned, its not a good idea to pull 12v power like that from a battery bank wired in series. I mean you could probably charge your cell phone off of it, but you don't want to run light, radio, blower motor etc...
 

IDIBRONCO

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The starter is same size as the 12 volt unit.
My mistake. I thought that a m1031 was a humvee, not a CUCV. I know for a fact that those humvee starters are bigger and WAY heavier than a civilian model 6.2/6.5 with a 12v starter.
 

Comptech

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I'm too poor for a Humvee..lol.. I know they are the rage right now, but I don't really like them. My father and I bought about 20 M35a2's and several 5 tons for resale. We had quite a few m715 s as well as 1028s and 31s. Out of all of them the m715 is my favorite. I have one sitting in epoxy right now with a 4bt/46rh combo. I have a complete 24/12 volt system for it. It uses a relay system to switch the batteries from series to parallel after start up. It was donated off of an old Mack truck.
 

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I can only imagine. We look at some Humvees that were in Pennsylvania. Almost all of them had a bad frame rails in the rear , which may be why they were put up for sale. Looks to me like the good buy right now is the Stewart and Stevenson cabovers with the caterpillar.you couldn't buy the tires on them for what those trucks are bringing right now.
 

Comptech

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Which by the way I have six ****** Michelin xzl mil spec 39"s with run-flats stashed away.lol Hoping that tall tire Knox part of that 5.88:1 gear ratio out of the the m715
 

jwalterus

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A lot of Cummins powered HD trucks and newer tractors use a 24V starter system and have a 12V electrical.
It's wired about like this, I don't really want to draw one up when this gives you an idea of how to wire it.


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79jasper

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In my experience the gm 6.2/6.5's, civilian 12/military 24v, have always cranked faster than any 6.9/7.3.

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Comptech

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jwalter.. thank you for the diagram. That is the system that I have for my old Jeep.
 

IDIBRONCO

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In my experience the gm 6.2/6.5's, civilian 12/military 24v, have always cranked faster than any 6.9/7.3.

Sent from my SM-N960U using Tapatalk
Now that you mention it, I believe that you're right. I just haven't heard many 6.2/6.5s running at all, not mention starting, since my time in Iraq ended in 2005.:cheers:
 

Comptech

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My son had to move the m1031 this morning. Even at -5 he said it made a pretty clean start. It was so cold last night we left everything on location running. I listen to the big caterpillar mud pumps fire up after service this morning, I don't know what they have for a starter but they sure do spin.
 

Macrobb

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Personally, I think that even if you got your starter to crank twice as fast as a stock starter, you won't get it to fire up without glow plugs when it's cold. There's simply not enough heat being generated without a lot of cranking.
And, once it's started, it'll smoke badly till it gets warm enough.

Contrast this with an IDI with good glow plugs and properly-timed IP. Should fire within two revolutions, and the glow plugs will stay hot for 30s or so after the engine fires up to reduce smoke and run better.

I've been at both ends of the spectrum here - from IDIs with issues that won't fire easily when cold(mainly glow plugs and/or worn IP) to ones that'll fire right up as soon as the glow plugs have cycled.
 

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