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only if you could get one at a lower cost than a tabbed alt. not sure if you still wouldn't need a adapter plate to hang a pad mount alt. lots of pics of OEM 3116/3126 engines with alts to look at online, but most of those also incorporate a upper fan mount bracket and I think the pad mount...

The cogen project I participated in, we were working with a 24V Leece and our reg was pushing it up to 48V. Way more efficient operation that way…

Something like this is an option to modify the existing mount. You have to cut a notch for the rear alt tab, and a spacer for the front, and do a little relief grinding on 2 of the ribs. You also need to fab a strut for the top mount tab over to the engine. With the mount out of the truck...

Yep, and i think you will find it probably hangs around 3300W, as that is where mine stopped building any more field. The field determines the output so full field should continue to maintain that output(P over I times E), as the load pulls down the voltage. At the point I went to(~120%), the...

And when you get done with that 200A test, perform the same test on a different 24v@ 100A alt… What you describe is what I would expect to happen on any alt. It will continue to deliver its maximum output in watts, because it will continue to maintain a field till it returns to its commanded...

I have probably played around with more alternators than most, my two diesel generators, I built myself. I participated in some R&D with a group working to develop a more efficient DC generator/cogenerator for off grid battery maintenance, with a custom arduino based regulator that actually...

Well if something wasn’t broke, why fix it… it isn’t just alternators that were failing. Low state of charge is the biggest killer of batteries, and it takes long run times to top off 240AH of depleted batts with a 100A dual volt. With more than half their 12V capacity consumed by lighting...

Sales hype? The cautions in their troubleshooting manuals clearly contradict this…

it isn’t limiting its current it limits its voltage, simply because it cannot make any more under increasing load Despite full field being applied… I can increase the load on it, and the voltage drops. but if you look at it in terms of watts, you will find the alt is still putting out a...

The shunt is in the loadbank connected at alternator...

I got a chance to play with the alt this afternoon, and voltage dropped off steeply once it hit full field Drive, same as any other alt. Using the rated +/- 0.5 criteria, I hit 27.5V ~120A(3300W). It fell past 25V just above that. I have an aging 1000A pile, so precise adjustments in the low...

I have only run mine to 100A, Let me see how my schedule shakes out this weekend maybe I can hookup again and collect some other data, as I will be backing the frame into the garage to weld up my hydraulic habitat restraints.. With 100A applied at idle I had .4v drop from 28V and .1V drop at...

yes and no. Alternators are rated to deliver their rated voltage up to their rated current. At this point they are basically driving the field near or at 100%, so have no more output to give. Any loading beyond this point will cause a decrease in output voltage. This decrease in voltage is...

I forgot yours was an A1R(too many different discussions:)). Have run across a few with A1 and a 260A. yep lots of ? What I have gleaned from other troubleshooting sessions is that the LBCD sends 28V to that F- terminal. If you disconnect that wire you can see it on the wire coming from the...

Well if this was an A1, I am pretty sure it didn’t come standard with the 260. That may have been the original LBCD though…. So if it had a 100A alt, and had AGMs installed, I could see it disconnecting more frequently due to overload and working those caps harder… Now if a 260A needs to...

The running load of the truck with everything on is perhaps 30A@14V or about 420W, And maybe 20A@28V for another 560W or 980W total. With dead batteries and everything turned on, the alt will probably be delivering it’s 60A max load@14v and the remaining 40A@28V. Thats 1960W. When the LBCD...

Most alternators don’t protect themselves from overload, try arc welding or charging lithium batteries directly with one:) they do tend to self derate with temp increase, and I believe these alts do so as well, but that is partly to accommodate differences in charging hot lead acid batteries...

Yea the heat syncs are for the diodes, All the electrical power used by the truck, other than to crank the starter motor passes thru those diodes… The circuitry monitors the duty cycle that the regulator pulses the alternator field via that F- or AC terminal on the regulator. When it sees a...

No the balance function is provided by the regulator on the alternator... There is only really one reason to have caps like that…

Good guesses, a battery disconnect under high load would probably cause a pretty good spike… big caps to catch that “noise”…