Des Moines, IA, need an alternator!

[ppillard]

Is there anyone in the Des Moines area that would sell me an alternator for my 1997 M1078, Cat 3116? I'm traveling thru and mine just crapped the bed.

 

[Ronmar]

Well if you were not on the road, I would say this is a good time to convert to a commercial 24V 200A alt and a 24-12 converter/balancer(about1/3 what you are going to pay for another N1506 alt).

It might still be a good time if you can find a 24v alt and mount where you are at. You could still pull 12v out of the middle of the bank long enough to complete your trip, I would avoid driving that requires headlights though, and finish up the install later(asap) with a 24-12 balancer install when you are done traveling…

Good Luck!

 

[ramdough]

Well if you were not on the road, I would say this is a good time to convert to a commercial 24V 200A alt and a 24-12 converter/balancer(about1/3 what you are going to pay for another N1506 alt).

It might still be a good time if you can find a 24v alt and mount where you are at. You could still pull 12v out of the middle of the bank long enough to complete your trip, I would avoid driving that requires headlights though, and finish up the install later(asap) with a 24-12 balancer install when you are done traveling…

Good Luck!

@Ronmar Do you have a write up on this conversion or video?

I would like to see what that takes. I have a serpentine belt 3126.


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[ramdough]

Is there anyone in the Des Moines area that would sell me an alternator for my 1997 M1078, Cat 3116? I'm traveling thru and mine just crapped the bed.

Perhaps @wheelspinner @Suprman or @fuzzytoaster has one they can ship you.

If you try @Ronmar s conversion but don’t have time for the balancer, you could maybe get small charger to top of each batter at night. You will want the balanced eventually though.


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[simp5782]

@Ronmar Do you have a write up on this conversion or video?

I would like to see what that takes. I have a serpentine belt 3126.


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I've done it on a 915 series truck you just need 1 alternator, 1 24v to 12v equalizer (suprman has them) 1 24v solenoid and 1 12v solenoid. You wire the solenoids to come on when the key is switched on and it opens the circuit for the equalizer. You would just hook the 12 and 24v to the existing wires at the alternator area.

 

[wheelspinner]

Perhaps @wheelspinner @Suprman or @fuzzytoaster has one they can ship you.

If you try @Ronmar s conversion but don’t have time for the balancer, you could maybe get small charger to top of each batter at night. You will want the balanced eventually though.


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I have a bunch but none tested yet

 

[Awesomeness]

When I was on the road and had alternator problems (turned out to be a rodent-chewed excite wire), I just bought a small generator and used it to run the battery charger. I even drove 1000 miles with the generator running, strapped down in the bed.

 

[coachgeo]

Is there anyone in the Des Moines area that would sell me an alternator for my 1997 M1078, Cat 3116? I'm traveling thru and mine just crapped the bed.

dont assume it took a complete dump. Many alternator places fail at testing these alternators and falsely say they are bad. Been there done that.

might be a bad wire (excite wire) from the oil pressure sender on engine that tells the regulator to have the alternator start making juice. several have jumped them from a nearby source of power. Search this in here. Using the search term "Excite wire" might bring up past conversations on this

PMing you about a fellow who now sells a complete alternator kit to swap in and includes AC bracket for future use.

 

[Ronmar]

Thats a good point, having seen some mis-diagnosis, are you sure yours is dead?

With the truck running, connect a small jumper between the forward regulator screw terminal(EXC) and the 28v alternator output terminal. There should be 24v from the battery on that large terminal tp ground and applying it to the EXC terminsl on the regulator should cause it to generate.

you also need to have good 12, 24 & GND paths between alt and battery. If it doesn’t see the 12-24 relationship of the batteries it will not work right…

 

[ramdough]

Is there anyone in the Des Moines area that would sell me an alternator for my 1997 M1078, Cat 3116? I'm traveling thru and mine just crapped the bed.

Did you get going again? What was the fix?


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[ramdough]

I've done it on a 915 series truck you just need 1 alternator, 1 24v to 12v equalizer (suprman has them) 1 24v solenoid and 1 12v solenoid. You wire the solenoids to come on when the key is switched on and it opens the circuit for the equalizer. You would just hook the 12 and 24v to the existing wires at the alternator area.

Not trying to hijack, but sense there has not been any traffic in a while, I thought it would be ok…..

What are the two solenoids for? To disconnect the equalizer positive lines so there is no vampire losses?


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[simp5782]

Not trying to hijack, but sense there has not been any traffic in a while, I thought it would be ok…..

What are the two solenoids for? To disconnect the equalizer positive lines so there is no vampire losses?


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Yes it kills the output of the equalizer. Generally I put one on the 24v input and one on the 12v output this prevents any robbing from just the 12v side if the truck is off