Re: Ping Alan

Alan Robinson wrote:
"Gar" <olgar2@xxxxxxxxxxxxx> wrote in message news:0056c397$0$22407$c3e8da3@xxxxxxxxxxxxxxxxxxxx
Alan.. my bud is trying to get a big ol' Onan diesel gen running for the fella that is letting my bud stay on his ranch..

It is a model 12.00JC-18R106625?7A [I think.. his writing leaves some to be desired..] Serial number 780.345056

He got the engine running fine but it is only putting out about 25.5 volts AC

My friend sys he finds it odd there are no breakers and there are a couple relays? on top of the panel of which one is burned or been quite hot..

With the paltry info I have can you give me a clue?? Where to go for a schematic? More info??

I will continue to look online.. but a cursory look was of little help..

Thanks.. I appreciate it.. -Gar


Gar,

You're going to have to get more and better information from him before I can help much - mostly a complete and accurate model/spec and serial number (although some GOOD pictures of the generator and control panel would be a great help!). Onan made this generator from the mid 60's to the late 90s in numerous variations - so it's hard to speculate very much about what the relays might be or whether his problem is related. If it's a late enough model that it has the brushless exciter, 25v ac would be about typical if the regulator is bad and not providing field voltage.

From what you've given me, it is a 12kw generator, DJC (diesel JC) air-cooled engine, remote start capable, and the generator end was supplied as a 12-lead 'broad range' reconnectable, i.e. with the proper connections the generator could provide 3-phase 120/208, 3-phase 120/240, 3-phase 277/480, 3-phase 240/480, or single phase 120/240 - this is the probable reason he couldn't find circuit breakers - Onan had no way of telling what voltage the customer was going to configure the genset for, so providing output circuit breakers was up to the customer (and covered in the installation/operation manual).

If he can give enough information that I can tell what his configuration is, I probably have a schematic that I can scan and email. Note that even that will require some interpretation, as it'll have some components connected by dashed lines - things that were 'options' for a particular spec, up to the technician to determine if they are there and apply or not.

The full model/spec should be something like 12.0DJC-18R / 12345AA (note that there WILL be a slash / after the 18R, then up to 5 digits, then one or two letters (two letters would be AA, AB, AC, or AD only). The service manual is probably still in print and available from Cummins/Onan - I'll be better able to tell you when I know for sure which you have.

Alan




Thanks so much Alan.. I will drive out and get this info and a couple pix myself today.. -Gar

--
Ol' Gar and Mahoney... Workin' on the Hot-Rod Bus.. under the bridge.. down by the river..

http://coltonmotorexpress.blogspot.com/
.

Relevant Pages

  • Re: Ping Alan
    ... He got the engine running fine but it is only putting out about 25.5 volts ... Onan made this generator from the mid 60's to the late ... reason he couldn't find circuit breakers - Onan had no way of telling what ... two letters. ...
    (rec.outdoors.rv-travel)
  • Re: generac Q55G
    ... Alan Robinson wrote: ... this generator in their minds because of the B&S name. ... Heavy vibration damping metal shrouds, oil filter, oil cooler, low RPM operation, excellent muffler, etc. ... Haven't had to work on one of the 'quiet-pac' versions yet - just the earlier NP55 version - but the problems have never been with the engine per se. ...
    (rec.outdoors.rv-travel)
  • Re: generator transfer switch
    ... asking about buying one and getting it installed, the price has gone ... This "attachment" is called a "Generator Interlock" and relates the two twenty-amp breakers that go to the plug for your generator and the main power disconnect. ... Turn OFF the circuit breakers that lead to huge electrical loads that might overload your generator. ...
    (alt.home.repair)
  • OT: Electrical Question #2
    ... I blew up my generator and lived to tell the tale. ... and connected one of the female 110 v outlets on ... Connector A, Top Right = Black ... Many thanks in advance, and thank G-d for GFI outlets, circuit breakers, ...
    (alt.guitar.bass)
  • Re: generator transfer switch
    ... breakers leading to the generator. ... Turn OFF the MAIN electrical service switch. ... Turn OFF the circuit breakers that lead to huge electrical loads (Range, ... Turn ON the paired circuit breakers that lead to the generator. ...
    (alt.home.repair)