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Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

What Have You Done to Your Onan Generator Today?


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  #1  
Old 01-19-2013, 10:45:13 PM
allis327 allis327 is offline
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Default What Have You Done to Your Onan Generator Today?

Maybe this will take off, maybe it won't or has been done.

I ran my 4cck under 90% load for 3 hours today then did an oil change. Ran great under load everything was in specs until I unplugged my stuff. Everything climbed (volts/hertz), throttle was closed as far it would go adjusted the carb and got everything back down. I also learned I need to buy more heavy duty cords if I want to be really prepared.
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Old 01-19-2013, 10:50:42 PM
Kpack
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Default Re: What have you done to your Onan gen today?

Didn't get to play my gen today was trying to figure the wiring out on my daughters horse trailer.
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Old 01-19-2013, 10:54:16 PM
Wayne 440 Wayne 440 is offline
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Default Re: What have you done to your Onan gen today?

Today, I did nothing except look at my RDJC with appreciation.
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Old 01-19-2013, 10:56:20 PM
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Onan Dan Onan Dan is offline
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Wink Re: What have you done to your Onan gen today?

Sounds like the 3 hour run time and the 90% load did the CCK good. got er warmed up good and probably cleared out all the old fuel etc and you picked up on your rpm,s so you had to slow her back down to 1800 rpm. me i am working on a CCKB onan i am trouble shooting got no spark, but getting close got lots of good help here on the stak.
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Old 01-19-2013, 10:59:29 PM
Ed Sparks Ed Sparks is offline
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Default Re: What have you done to your Onan gen today?

I worked on getting some of the old oil and crud off my newly acquired 44H, which looks an awful lot like an OTC.
Brake clean is doing a good job so far.
Also dug out a new set of wheels to replace the tiny lawn edger wheels on the cart.
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Old 01-19-2013, 11:12:32 PM
rmchambers rmchambers is offline
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Default Re: What have you done to your Onan gen today?

I did nothing today to the generator but I did put an outside outlet box to run power from the gen into the house to my inverter without having to open the basement window. It was a bit of a PITA but it will make life easier in the long run.
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Old 01-19-2013, 11:26:56 PM
AndersonMillTexas AndersonMillTexas is offline
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Default Re: What have you done to your Onan gen today?

I set up the exhaust on my 7.5 Jb. Also, installed A thru wall vent. Tomorrow I will find a place to set the battery. Then hopefully give it a long run, check the specs and make some fine tuning.
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Old 01-20-2013, 12:36:45 AM
len k len k is offline
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Default Re: What have you done to your Onan gen today?

Looked at my AC regulator sitting on a table, wondered when I would get a chance to fix it,,,,,,,,got over it, went to store for food and beer.
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Old 01-20-2013, 01:08:32 AM
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John Newman, Jr. John Newman, Jr. is offline
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Default Re: What have you done to your Onan gen today?

"....until I unplugged my stuff. Everything climbed (volts/hertz), throttle was closed as far it would go....."

I hope you are not using your idle stop screw to set the no-load engine speed (1800 RPM). That speed should be maintained by governor action only. You should be able to manually move the throttle down to an acutal idle (do this only with NO loads conneted to the generator). Sounds like once it got warmed up it wanted to run considerably faster than it should because it could not close the throttle down.
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Old 01-20-2013, 05:02:42 AM
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Billy J Shafer Billy J Shafer is offline
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Default Re: What have you done to your Onan gen today?

Quote:
Originally Posted by len k View Post
Looked at my AC regulator sitting on a table, wondered when I would get a chance to fix it,,,,,,,,got over it, went to store for food and beer.

I like the way you think.
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Old 01-20-2013, 05:06:51 AM
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lokay5 lokay5 is offline
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Default Re: What have you done to your Onan gen today?

Quote:
Originally Posted by John Newman, Jr. View Post
"....until I unplugged my stuff. Everything climbed (volts/hertz), throttle was closed as far it would go....."

I hope you are not using your idle stop screw to set the no-load engine speed (1800 RPM). That speed should be maintained by governor action only. You should be able to manually move the throttle down to an acutal idle (do this only with NO loads conneted to the generator). Sounds like once it got warmed up it wanted to run considerably faster than it should because it could not close the throttle down.
What John said
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Old 01-20-2013, 08:45:35 AM
farokh farokh is offline
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Default Re: What have you done to your Onan gen today?

Quote:
Originally Posted by John Newman, Jr. View Post
"....until I unplugged my stuff. Everything climbed (volts/hertz), throttle was closed as far it would go....."

I hope you are not using your idle stop screw to set the no-load engine speed (1800 RPM). That speed should be maintained by governor action only.
I'll third this. I had a huge problem with my 12.5JC where as it got loaded it would slow down, turned out the idle stop screw was interfering at the no-load state, so even though I had it adjusted for 1800 RPM, as the genset got loaded, the RPMs would drop because the governor was out of adjustment. Once I backed off the idle stop screw and adjusted the governor, everything started working great.
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Old 01-20-2013, 09:24:00 AM
Max Thompson Max Thompson is offline
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Default Re: What have you done to your Onan gen today?

I pulled the heads from a recently acquired 15 KW JC. Exhaust & head bolts were nearly loose. I was surprised at the amount of carbon & junk built up in the intakes, also in the exhaust ports to a lesser degree. It is a natural gas engine with high compression pistons, no fuel pump & gaseous only carb. I expected the heads to be fairly clean, being gaseous fueled.

Pulled the valves & cleaned it all up, replaced valve seals, reinstalled heads & manifolds. Hope to get it running today, so I can assess the rest of the unit. It needs a good bath, but with a high of 28 this morning & getting colder all day, that will probably not happen.
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Old 01-20-2013, 10:24:09 AM
allis327 allis327 is offline
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Default Re: What have you done to your Onan generator today?

The idle stop screw is not touching anything, I assume it my gov adjustment and carb adj screws I just have to sit down with the manual and go through everything. It is pretty well spelled out how to do it just need to make the time.
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Old 01-20-2013, 02:34:06 PM
gchank gchank is offline
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Default Re: What have you done to your Onan generator today?

Odd thing you ask. I ran the 6.0djb after adding the BFB (big f##king battery), new cables, and finding a issue with the glow plugs. The glow plugs were getting low voltage,,,not no more. Then I ran the engine under 15amp load for about a hr.

Things are looking up,,,now to adjust the new flight board and get the htz right.

Then interlock, disconnect, and conduit and we are running on all cylinders...
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Old 01-20-2013, 02:48:21 PM
gtj811 gtj811 is offline
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Default Re: What have you done to your Onan generator today?

Hoisted my 5cck off the furniture dolly and onto a "800 lb" rated tractor supply garden wagon. Changed the 20 plus year old oil from previous owner and put in Castrol synthetic for a nice oil bath. Dragged the cart and genny to my back yard and natural gas supply. The piece of Chinese junk "800 lb" wagon collapsed with my 35o lb? Cck? Almost fell off the cart. Finally got it running ok on natural gas but my 1/2 inch supply hose needs to be 3/4.....runs at 64 he too high but the circular saw then drops it to 58 and it struggles. Think I should tow it into my walk in finished basement while I find the beer and the remote? Go Patriots! Time to plan next weekends Onan projects!
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Old 01-20-2013, 03:10:43 PM
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Billy J Shafer Billy J Shafer is offline
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Default Re: What have you done to your Onan generator today?

Well I went to mine,patted it ,talked to it,brushed it,stroked it. Maybe I had better stop starting to get warm around here
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Old 01-20-2013, 03:46:54 PM
Max Thompson Max Thompson is offline
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Default Re: What have you done to your Onan generator today?

Quote:
Originally Posted by Billy J Shafer View Post
Well I went to mine,patted it ,talked to it,brushed it,stroked it. Maybe I had better stop starting to get warm around here
Billy:the question was "What did you do with your Onan" today. It sounds like maybe you misunderstood.
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Old 01-20-2013, 04:09:45 PM
Douglas123 Douglas123 is offline
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Default Re: What have you done to your Onan generator today?

NOTHING, Get more firewood and Nothing this afternoon MAMA just told be she wants to go to the casino. Always tomorrow, I know they are lonely in the home workshop but at least the are out of the weather not like 6 of my other non onan junkers exposed to the elements. Later
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Old 01-20-2013, 05:57:09 PM
Kevin K Kevin K is offline
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Default Re: What have you done to your Onan generator today?

Quote:
Originally Posted by gtj811 View Post
Hoisted my 5cck off the furniture dolly and onto a "800 lb" rated tractor supply garden wagon. The piece of Chinese junk "800 lb" wagon collapsed with my 35o lb? Cck? Almost fell off the cart.
You noticed that, huh? When I brought my winter project 5CCK into the basement, I put it on my 1000 Lb rated Harbor Freight cart. It moved a few feet, bent the cart, and fell on the ground. It's now on a furniture dolly, almost ready to run. I just need to make some sort of cart for it.
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