billystuart
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Has any one ever installed one?
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Dual 12 / 24 volt alternator on M932A2
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BrushMaster Builder
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Yes, I've installed the CE Niehoff 200 Amp 12/24 on two M939 (with Armored Cab) repowers I did a few years back for the National Guard. We had to build a beefy support bracket to hold that bad boy.....heres a pic
BrushMaster Builder
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Heres a little clearer picture before all the other accessories and hoses were installed. 
162tcat
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Brushmaster, what intercooler are you using in front of the radiator? Is that a stock m939 radiator? What other application, if any, is that intercooler used on?
Doomsday
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Please post more pics of your rig, Brushmaster. That alternator set-up is a great addition.
BrushMaster Builder
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The radiator and CAC in the picture is the same cooling package in a Marine Corps 7-Ton MTVR manufactured by Modine. That cooling package, in the MTVR, supports a C13 Cat and a 4700 Allison. In my repower I was using a Cummins ISL and 3500 RDS Allison. Needless to say....that cooling package had no trouble with the Cummins and Allison. More is always better..........
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Thanks for sharing the info and the pictures! Keep them coming!
Are the front brakes upgraded? I see a 3rd hose? Can you tell us more.
Are the front brakes upgraded? I see a 3rd hose? Can you tell us more.
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the 12/24 military gennys dont put out as much 12 volt amps as you'd think.....
jelfert
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I just purchased one of the Niehoff 100 amp dual alternators for my M35a2 but I havent got it yet. How did you wire yours up?
billystuart
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I haven't installed mine yet, still on the work bench.
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Another option would be a battery equalizer. I picked one up for my SEMTT project that supports up to 50 amps for $125 shipped off ebay.
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To me, it looks like the CTIS hose.
clinto
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billystuart
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One more question, how did you wire it up? I haven't tried to install mine yet. Once again, thanks for any help.
jelfert
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My dual volt alternator has a 8 groove pulley. What is the correct belt to use? I've read that it will need to be longer than the stock one.
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jelfert
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Here is a link to wire up the single and dual voltage Niehoff models
http://www.ceniehoff.com/Documents/Ctrl_Hyperlink/II0030A_uid121020091141311.pdf
http://www.ceniehoff.com/Documents/Ctrl_Hyperlink/II0030A_uid121020091141311.pdf
w3azel
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Ok so I'm about to purchase one of these dual voltage alts for my truck. I don't know much about these types of things but I just want to get something cleared up before I start wiring. Everything shares the same ground correct? I don't need to wire a second ground separate from the vehicles current one for the 14v system?
davo727
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Ground is ground, you don't have to build an isolated system to add in the 12 volt deal.
CPDOG
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hello from Seattle
I have been communicating with a rep from Niehoff about ordering the 1505 and he sent me the actual blueprints and I have been doing some base line dimension checks and so forth., but has anyone actually installed one yet? if anyone has, please send me an email if you would. and maybe some pics.
my main concern is it a drop in replacement or will there be some fabricating of different brackets involved?
I thank all of you for the inputs and look fwd to reading them.
I have been communicating with a rep from Niehoff about ordering the 1505 and he sent me the actual blueprints and I have been doing some base line dimension checks and so forth., but has anyone actually installed one yet? if anyone has, please send me an email if you would. and maybe some pics.
my main concern is it a drop in replacement or will there be some fabricating of different brackets involved?
I thank all of you for the inputs and look fwd to reading them.
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I am looking at adding a n1511 dual 12v & 24v 100 amp off a lmtv to a nhc250 m923. From what I can see so far the double ear will mount on the bottom but definitely need a new top bracket fabricated for the top mount. A double pulley looks ok to mount on the front shaft. I am concerned the voltage regulator might not clear the oil cooler. I have not yet tried to mount it.