M1152 400 Amp Alternator

[aslemmer]

My M1152 has an issue with the giant 400 amp alternator rubbing on the wiring harness coming out of the firewall right behind it. Two wires have already had to be repaired as a result of this.

Is there any known fix for this issue? There is not enough clearance to guarantee the alternator will not rub in the future.

Thanks for any help.

Adam

 

[Milcommoguy]

My M1152 has an issue with the giant 400 amp alternator rubbing on the wiring harness coming out of the firewall right behind it. Two wires have already had to be repaired as a result of this.

Is there any known fix for this issue? There is not enough clearance to guarantee the alternator will not rub in the future.

Thanks for any help.

Adam

Just what everyone needs. A 400 amp arc welded on a 150 HP engine.

Ahh, Just making sparks, CAMO

 

[frank8003]

I cut longwise a lot of heavy water hose to wrap problem areas with.
Not a lot will get thru that. Can always turn it for inspection.

 

[Action]

Get a 200 amp alternator.

 

[NDT]

Get a 200 amp alternator.

Couldn't agree more. That engine moves around and a massive short will burn your truck down.

 

[AAVP7]

Also, a 400 A alternator robs a lot of engine power. Rough calculation: 400 A times 24 Volts divided by efficency of alternator (say: 0.8 ) = 12 kilowatt, or 17 horsepower !

 

[frank8003]

That is sort of a special truck? If She were mine I would protect Her as built and use it.
Check over the whole bracket and mountings....

Bracket, Alternator-Power Steering 400amp ; M1114 ; 2590-01-567-7817 1

BRACKET , ALTERNATOR & POWER STEERING PUMP (for 400amp each) **** 9/16" mounting-holes **** ____________________________________________ Fits: HMMWV , M1097 , M1114 , M1151 , M1152 , H1 , etc. ____________________________________________ Part Numbers: 12469497-1...

comtac.parts

I to old to have one but already thinkin of ways to power my house with it.

 

[Coug]

Also, a 400 A alternator robs a lot of engine power. Rough calculation: 400 A times 24 Volts divided by efficency of alternator (say: 0.8 ) = 12 kilowatt, or 17 horsepower !

That should only be when it's actually producing power to that load.
The rest of the time it's just robbing the power needed to keep it spinning, plus a little more for the extra mass/electronics.
If nothing else though, you're going to go through belts a lot faster with it, especially if you like revving the motor.

 

[AAVP7]

That´s right. An electronic alternator will adapt the output power, and thus the power it needs as input. However, I recently learned from a Niehoff engineer that their alternators "like to have a minimum load". I think they quoted 25 % of max output, but that´s from memory.