200 amp generator vs. 100 amp

[2w091]

Our 1025A2 has a 100 amp Niehoff generator, NSN 2920-01-407-0532
Is there a problem with replacing it with a Niehoff 200amp NSN 2920-01-420-9968

Please excuse my ignorance of all things electric, I know many things, but dealing with electronics ain't one of my strong suits.............

I'm learning this as I go.

 

[hummer4x4guy]

http://www.kascar.com/Real4WD/manuals/Humvee Parts Book-1.pdf

if this link works it might help you out

 

[DatGuyC]

I believe the 60amp, 100amp, 200amp, and 400amp alternators all have different mounting brackets

 

[hummer4x4guy]

Well we found out earlier on a post of mine that a 60 and 100 amp will fit on the aluminum or steel bracket but one uses 2 short bolts and one uses a single long bolt. Not sure on 200 and up tho.

 

[Retiredwarhorses]

200 amp uses a different bracket, and is wired direct to the battery pos stud in the battery box.
i have the install kits NOS and everything is included...instructions, pulled, belts etc.

 

[jpg]

Our 1025A2 has a 100 amp Niehoff generator, NSN 2920-01-407-0532
Is there a problem with replacing it with a Niehoff 200amp NSN 2920-01-420-9968

Others have mentioned the important issues of mounting, pulleys, etc. Electrically speaking, a higher-amp alternator will not cause problems.

The voltage regulator controls alternator output. Up to the capacity of the alternator, it outputs enough amps to keep the voltage at proper levels. You want enough amps to run all your lights etc, plus to charge the battery. An over-sized alternator may never output more than a small fraction of its capacity. This excess capacity means unnecessary weight and cost, but it will not cause electrical problems.

 

[Retiredwarhorses]

The 200 is the standard now in all replacements for the older hmmwv....

 

[2w091]

I was able to get the part through the supply chain for the cost of shipping. The only generator available was 200amp, it is CC-A and hopefully new in the box. We do run two light bars, a fixed radio, several small mounted LED lights, a white LED spot light bar and the emergency equipment switch/siren box. We also installed a cut off switch for all the 12 volt equipment when it's not in use.