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Delco and other Low Voltage DC Light Plants Antique Generators, Light Plants, Typically 24, 32 or 48 volt although some are 110 volt. DC Lamps, Motors and appliances.

Delco and other Low Voltage DC Light Plants

Delco 8C3 information and diagram?


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  #1  
Old 10-16-2016, 09:46:14 PM
abowman89 abowman89 is offline
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Default Delco 8C3 information and diagram?

So another delco followed me home. I'm the proud new owner of an 8c3. I've prepped the engine to run and cleaned/replaced all the wiring I could see bad. I have no idea how to start this thing and the wiring diagram is gone. On 24v I can only get the top right coil to snap when I throw a large load on while in automatic mode. Does anyone have good information on one of these. I saw Wayne saphr's web site, is he still around selling manuals?
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Old 10-16-2016, 10:16:13 PM
netpirate8 netpirate8 is offline
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Default Re: Delco 8C3 information and diagram?

We have new re-print manuals for sale. These are high quality spiral bound books. Here are some examples. This manual also covers a wide variety of other models. Feel free to send me a private message. Thanks. Good luck with the new Delco!
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Old 10-17-2016, 07:13:53 AM
George Andreasen George Andreasen is offline
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Default Re: Delco 8C3 information and diagram?

netpirate8........sent you a PM.
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Old 12-01-2016, 07:04:51 PM
abowman89 abowman89 is offline
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Default Re: Delco 8C3 information and diagram?

Ok so I'm messing with lightplant trying to make it run. I think my fuel pump is not pumping enough fuel up. I get a tiny amount coming out of my return and the engine just pops a few times and stalls out like it's starving for fuel. Is anyone firmiler with these? Anyone know what the fuel pump or rebuild kit part numbers are?
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Old 12-01-2016, 10:08:22 PM
abowman89 abowman89 is offline
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Default Re: Delco 8C3 information and diagram?

Well an update, I went out to the garage and got it to run for a short period of time. That overflow carb makes no sense to me. I still don't think it's pumping enough fuel up. I'm going to have to fiddle with the carb some more and trouble shoot the generator so I can use that to start it instead of a drill
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Old 12-02-2016, 08:45:32 AM
George Andreasen George Andreasen is offline
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Default Re: Delco 8C3 information and diagram?

Overflow carbs were designed to avoid the "complexities" of a float type carb. They are dirt simple in operation.....about the only things that can go wrong would be a bad fuel pump or a plugged fuel nozzle.

I've never worked on a Delco Light with such a carb, but have some experience with others. You should be getting a fairly decent amount of gasoline coming out of the overflow and back to the tank. If it's only a few drips it's a good bet that the fuel pump diaphragm is shot (old, brittle, cracked).

Is the fuel pump a "standard" type.....meaning it has a diaphragm, or is it a piston type? A piston type usually just needs disassembly and cleaning (old lacquered gasoline).

If you check on Ebay, there is someone selling Viton material in circular disks, left over from some manufacturing operation. They are just the right thickness for most fuel pumps and pretty affordable. Assuming you have to take the pump apart be sure to examine all the little check balls/springs that make up the valving section and MAKE NOTES HOW IT GOES BACK TOGETHER (don't ask how I learned this). Cutting and replacing that diaphragm should get the pump operating again.
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Old 12-02-2016, 12:19:55 PM
abowman89 abowman89 is offline
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Default Re: Delco 8C3 information and diagram?

Well I guess that would make sense. I'll have to disassemble the fuel pump. I ran into another problem I discovered after I got it to run fairly well for 45mins. I think on of my main bearings is bad..... makes a lot of noise just rolling it over now and I had put fresh oil in it before trying to start it
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Old 12-02-2016, 08:59:36 PM
George Andreasen George Andreasen is offline
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Default Re: Delco 8C3 information and diagram?

I'm not familiar with the bearings in that model, but I'd bet they're the same as in my 850........very heavy roller bearings that should last forever with any kind of lubrication. About the only thing that could damage them would be rust pitting......possible I guess, but kinda doubtful.

Before you start tearing into it, check first and make sure it's not the brushes making that sound. My 850 makes a horrible squealing noise when cranking or just turning it over by hand. It really does no harm if it is, although a good armature slot cleaning and brush adjustment probably wouldn't hurt.
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Old 12-03-2016, 03:02:23 PM
abowman89 abowman89 is offline
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Default Re: Delco 8C3 information and diagram?

I checked the brushes and that wasn't my noise. So two hours later I have the entire thing disassembled on my bench. It was for sure the front main. It's a double row ball bearing and it feels like sand. After I cleaned and oiled it, if I give it a spin and let it roll it'll catch and stop randomly.
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Old 12-07-2016, 07:54:51 AM
Mobile Mechanic Mobile Mechanic is offline
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Default Re: Delco 8C3 information and diagram?

You MIGHT get lucky.. Detroit ball bearing may have a set or can make you a new set if you need....
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