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What Have You Done to Your Onan Generator Today?

len k

Subscriber
Last Subscription Date
12/12/2018
Another plus of being near a big city is mine has ~ 3 hospitals. Gets more important as you get older. One is only ~ 7 minutes from me.... think heart attack.

Even at that I just drove wife 1.5 hour each way to have thyroid removed, that's the hospital on insurance plan she had. :bonk: That's going to change now that she has medicare.
 

Handyhiker1

Registered
Started and went to load test my 4cck portable and had no output. Checked the brushes and all looked good under the cover. Started it again and nothing at the outlets or gauge and the work light was not on. :mad: Took the front off the junction box and all looked good. Started it up again and used a volt meter on the output wires from the gen head. 127 volts! What the heck!! A few more tests and I found a loose ground at the main ground connection. Tightened that up, put it all back together and shazam, fixed!! :D
Then load tested it to about 3150 watts and all is right in the land of green again.
 

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Zephyr7

Registered
Always remember in vibrate-y things like generators:

lockwashers are your friends!

I’ve seen BIG (600MCM) wire come loose in commercial gensets when the Allen screw in the lug had vibrated ALL the way out of the lug. That’s why I always spec compression lugs and vibration resistant hardware (usually grade 5 bolts with split lockwashers) on all connections.

BTW, you need grade 5 hardware to meet UL requirements for booted electrical connections.

Bill
 
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YellowLister

Subscriber
Last Subscription Date
o9/30/2019
I tried stuffing 1800 pounds of onans in a 6x12 uhall enclosed trailer and found the 7.6 jb made the aluninum floor bow to a undesired ammout..

Decided against risking it, being it would be sitting in it till the 25th till the new house closes... so it and a cck went in the neighbors garage
 

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Handyhiker1

Registered
Always remember in vibrate-y things like generators:

lockwashers are your friends!


BTW, you need grade 5 lugs to meet UL requirements for booted electrical connections.

Bill
I agree with the lock washers. I am using the factory brass screws and star washers.
I believe that this was my fault from installing the 4 prong twist lock plug and just getting in a hurry. I have only run this unit about 3 hours so I don't see it coming loose on its own.
 

Zephyr7

Registered
I agree with the lock washers. I am using the factory brass screws and star washers.
.
What I like to do is to use star washers to bite through paint, and usually split lockwashers to keep things together. For something like a ground lug, I’ll put the lug under the head of a bolt with a star washer between the lug and the frame. I’ll use a split lockwasher between the frame and the nut on the other side.

Star washers work by biting into things and working like a ratchet to resist loosening. Split lockwashers bite a little with essentially one tooth, but they provide some spiring force lengthwise along the fastener assembly which helps to reduce loosening from thermal cycling.

For busbar connections at work I spec a connection like this: bolt head / flat washer / busbar 1 / busbar 2 / flat washer / split lockwasher / nut. I only ever use star washers for grounding to bite through oxide layers or paint to provide a gastight connection. Split lockwashers are used pretty much everywhere else.

We used to use Belleville washers on the busbar connections, but the electricians were always installing them backwards or not doubling up where needed so we stopped using those.

Bill
 

DJB6.03CE

Registered
Possible new project that might turn into scrap.
Trading a refurbished Hobart welder for it and some cash for me.
Is this water cooled? I see two fuel stop solonoids.
I imagine the motor is a complete rebuild.
Might be a good junk yard maybe, I see other interesting things in the back ground








 
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YellowLister

Subscriber
Last Subscription Date
o9/30/2019
I would not give more than scrap value for that.. fuel pump is gone and open hole and all rusty.. probably has water in the engine.

That looks like a rdjc but may of been city water cooled.

Looks bad.. air cleaner is open too.. control box is unbolted just to many what ifs.
 

JohnnyC

Subscriber
Last Subscription Date
07/13/2019
Like what Yellow said, but there are a few good, hard to get and expensive parts on that set if they are still good. For example the glow plugs. They go for about $50 each and hard to get. Injectors if still good. Injection pump and more.

Earlier this year I bought a DJC that had a broken crankshaft at the flywheel for $150. I needed only the 12.0 kw YD generator end for a project I was building at that time. By the time I parted out the components on the motor and parts I saved for my working diesel sets, I easily made back the money I spent on the DJC salvaged set and have parts in stock that would easily cost me $500 if I had to buy on Fleabay.

By the way, those 2 12 vdc fuel solenoids are very desirable to have for spares. They are expensive and hard to get. A working solenoid sells easily for more than $125 each on Fleabay.


Offer the seller $100 or less.

JohnnyC
New Jersey
 

HondaATC

Registered
I didnt work on my Onan Generator today. But I had an idea to transfer A heavy starting load over to a smaller generator. After it's running For fuel savings.

Like if you had one of those big barrel fans that needed 2000 watts or more to start. But 450 watts to run

https://youtu.be/__-rPeFhB_Q here's my YouTube video. I didn't slap it fast enough at first. You have to slap it fast
 

HondaATC

Registered
What happens when the compressor cycles off, then on again?
Ray
You have to make it so it never shuts off. I noticed while using my air-conditioning unit after Irma in the livingroom. The compressor never shut off. Because it couldn't cool the room totally down. And the thermostat was set to it's coldest setting.

But if it were to kick off and back on.
it would overload the generator sadly and you would probably have to start it back up again.
 

Vanman

Subscriber
Last Subscription Date
07/10/2019
This also helps to illustrate how much more efficient it is to have equipment that is sized for the load, rather than too big. Small A/C running continuously is Much more efficient. And a small generator with a good, continuous load on it is Much, MUCH more efficient than a large generator alternating between light load and no load. Very cool. :D
 

Zephyr7

Registered
This also helps to illustrate how much more efficient it is to have equipment that is sized for the load, rather than too big. Small A/C running continuously is Much more efficient. And a small generator with a good, continuous load on it is Much, MUCH more efficient than a large generator alternating between light load and no load. Very cool. :D
This is why it’s good to have zoned HVAC. Usually one zone is the bedrooms and the other is the rest of the house.

In my house, I have two “zones”, both equal sized and randomly about 1/2 of the house for each. In the summer, I configure things so one of the two AC units does the majority of the cooling. This runs it closer to full load, and helps a lot with humidity and overall efficiency. The second unit runs when the first can’t keep up, and at night since one is more bedroom than house.

You can save a lot of money with careful planning of your HVAC setup and configuration of a setback thermostat.

Bill
 

nothingbutdarts

Sponsor
Last Subscription Date
08/15/2019
Ran the SK today for about 1:45, including warm up & cool down. Load varied between 30 and almost 60 amps a leg. Baked brownies, ran hot water heater, the dishwasher, everything I could turn on in the house was on! LOL
I did turn on the 5HP 220volt air compressor, it made strange noises while running, I turned it off immediately, went in & got a volt meter, tried starting it again, it made the same strange noise for about 5 seconds and then got normal. It was showing 113 volts at the disconnect box while running/starting. The air tank was empty. It is a Baldor motor. I have never heard it sound like that before on normal utility power.
Just before shutting the generator off I increased the no load volts to 123v. In the house the voltage varied down to 116v. while the set was maybe pulling 60 amps.
 
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EICBob

Subscriber
Age
62
Last Subscription Date
07/13/2019
Took a look at my next 2 project Onans, realized that with the better half going in for yet another surgery on her foot next week, there will be precious little time to get any green therapy. Am taking a week off of work to help her get used to not being able to put any weight on her foot for the first 2 weeks.
I sure hope this time they, the surgeons, get it right and after 6 weeks of not putting weight or walking very far she will be able to move under her own power again.

Meanwhile hoping the 5CCK and the 5BGA will not be too angry at me for neglecting them!

-BobC
 

Zephyr7

Registered
Your Onans will patiently await your next opportunity to play with them I’m sure :)

I hope your wife’s surgery goes well and I wish her a speedy recovery.
 

Vanman

Subscriber
Last Subscription Date
07/10/2019
I bought my first one! Dec, 1962 5CCK. Thanks Birken! :wave:

It’s technically my second, but the other came with a bus, and is too modern for me. Electronic AVR and all that. So I’ll count the cool old CCK as my first Real Onan.

My sister is hauling it home for me, ~500 miles. Shown here in the back of her car.

I sure hope these Onans get along OK with Kohlers!

Keith
 

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nothingbutdarts

Sponsor
Last Subscription Date
08/15/2019
Um, do you think the shown driver will be able to get it to you??
:O I bet that was a bear to get loaded in there with the wood legs! Happy Onan.
 

YellowLister

Subscriber
Last Subscription Date
o9/30/2019
I think the dog approves.. if you leave onans and Kohlers alone to long you end up with kubota diesel powered sets.. or gold Kohlers and gray onans.. or just more generators they are like rabbits..
 
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