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Onan Generators

What Have You Done to Your Onan Generator Today?


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  #1501  
Old 03-03-2015, 10:23:29 PM
snowshoveler snowshoveler is offline
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Default Re: What have you done to your Onan generator today?

Power was off for an hour this morning, just before the wife was going to work. She called me and asked what to do.
Battery for genset was in the basement on a battery maintainer.
I am not sure she could lug it from there to genset through the snow.
So I asked her to call the power company and get a extimate from them.
Was going to be off about an hour.
This would normally be no problem, however she had just loaded the wood furnace for a days burn. And now it was heating...a lot and no way to cool its self.
She closed the draft and waited for the power to come back.
I was on the other side of town and would take almost as long to get home as the estimate for power back.
We have a thermometer in the plenum of the furnace ...it wound out to 240 plus...thats the end of ts guage.
Thankfully the power was restored before the hour was up. Appears that there is no damage.
This evening The battery was re installed in the genset along with longer leads so its easier to re connect.
Then the wife and I had a little course in how to start the genset and transfer the load.
I had the directions written on ths switches and panel, however until today there was little interest on her part.
She was however very interested this evening.
We have a schedule now and Saturday afternoon she is going to start the set and transfer the load for a half hour or so then transfer back and shut it down.
Might even get her to look the set over.
Regards Chris
Tod
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  #1502  
Old 03-03-2015, 10:46:47 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

Might help to add color coded dots/paint/stickers to switches that need to be flipped, and to instruction sheet ???

I tried something like that once, explaining sine and cosine to GF. She actually understood it...... for ~ few weeks......
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  #1503  
Old 03-03-2015, 10:47:05 PM
YellowLister YellowLister is offline
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Default Re: What have you done to your Onan generator today?

I've been letting a jc I got soak for about a month in atf as its stuck and rusty.. a week or so ago I started removing the gen end.. and found it was really rusted.. in hopes of saving it .. I removed the rear part of it the brushes are in.. was a pain, yd gen end..

I also attempted to remove the stator.. but found it was badly rusted where the gen end slides into the housing.. I've banged on it and pryed so much the rotor came lose.. which is a first as that is usually the hard part to remove.. the fan on the rotor is keeping it from coming out.. so again I tried to pry it and smack it with a 5 pound led hammer.. after spraying pb blasted all over.. with no luck.. bent my crowl bar trying and a large flat head.. tried heating it up around the rusted area with no luck.. still have hopes of saving it, of couse after a very good cleaning..

Last edited by YellowLister; 03-03-2015 at 11:10:43 PM.
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  #1504  
Old 03-04-2015, 08:20:53 AM
Max Thompson Max Thompson is offline
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Default Re: What have you done to your Onan generator today?

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Originally Posted by yellowlister View Post
. I removed the rear part of it the brushes are in.. was a pain, yd gen end..
Where did you find the brushes in the YD gen-end?

I am surprised the rotor came off. Have you "removed" the through bolts? I have seen them rust inside the stator enough to hold it pretty tight.
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  #1505  
Old 03-04-2015, 05:51:04 PM
YellowLister YellowLister is offline
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Default Re: What have you done to your Onan generator today?

Opps.. yeah no brushes.. here are a few pics.. going to remove the through bolts and see if I can get it to turn instead of pulling on it..
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  #1506  
Old 03-04-2015, 06:01:10 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

I'm surprised, the rotor wire look thicker than the stator. PM generator/exciter must be a low voltage design. But I don't know JB/JC that well.
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  #1507  
Old 03-04-2015, 07:42:59 PM
YellowLister YellowLister is offline
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Default Re: What have you done to your Onan generator today?

Im going to say the rats and mice and salty ventura air and owner neglect has killed another one.. found a big rodent nest between the gen and engine.. the stator is severly rusted and pitted at the bottom.. the rotor does look ok.. and the engine is still stuck.. blah...
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  #1508  
Old 03-04-2015, 08:31:39 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

Can't really see the stator rust and pits for the mouse nest, but unless the laminations have turned to dust and a lot are totally missing I'ld say give it shot anyways. Even if stator is rusted to the point of concentricity problems can always shim it. Tap off and remove hi-spots of rust so rotor and stator laminations don't hit. Likely a wide .010 -.020 inch gap anyways.

Stuck engine may be the bigger problem though.
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  #1509  
Old 03-04-2015, 08:37:02 PM
YellowLister YellowLister is offline
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Default Re: What have you done to your Onan generator today?

Maybe.. it also needs a v/r as the old one has water damage, and the control box is trashed from another mouse nest
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Old 03-04-2015, 09:11:48 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 yellowlister View Post
Maybe.. it also needs a v/r as the old one has water damage, and the control box is trashed from another mouse nest
Sometimes, we just have to say "uncle". Pull all the goodies off & put them up on the shelf and scrap the rest.
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