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Onan Generators

What Have You Done to Your Onan Generator Today?


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  #831  
Old 08-29-2014, 07:30:10 AM
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 Jim McIntyre View Post
Max -

Those IR thermometers are sure convenient. But if the surface you're measuring is shiny, they'll be off. Possibly WAY off...

The measurement they take depends on TWO things. First, of course, is the temperature of the surface. The second thing is how well the surface radiates IR energy. This is called the emissivity.
I know NOTHING about IR thermometers, this is a new toy & likely not an extremely sophisticated one for the price.

Yesterday I took temp. readings of all the places I used in the "test" (I use this term loosely) with the sets not running. All readings were within 1 degree on both sets in all places checked.

Another thought crossed my feeble mind. Even if painting cooling fins on a set made 50 degrees difference in the running temp, "so what". It is much less than the difference of running a set here in the winter with ambient temps. in the teens verses running this week with temps in the 90s. I would also question the different "insulating values" of rust verses paint.

I think measuring oil temperature as suggested may be a more accurate indicator of actual engine temp. I think this will be my next project, to install a sensor in the oil pan of both sets.

Nothing "solved", but it keeps me out of the bars.
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  #832  
Old 08-29-2014, 08:30:04 AM
PopsGarage PopsGarage is offline
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Default Re: What have you done to your Onan generator today?

When I use a I/R temperature indicator I put a piece if masking tape with a dot on the surface to be checked, shinny surfaces and less than 90deg
(angle not temp) will produce false readings, by aiming at the dot you get the exact same sample each time

Bob
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  #833  
Old 08-29-2014, 12:19:13 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

That's the key to comparing different temps. Have a repeatable surface to shoot at. I suppose it doesn't really matter what it is . As long as it's not shinny, you can't see thru it, and it's thin (so it doesn't insulate). guess thats why they used the foot powder.
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  #834  
Old 08-29-2014, 01:01:40 PM
JohnnyC JohnnyC is online now
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Default Re: What have you done to your Onan generator today?

Today, Friday, Labor Day weekend coming up. "F" regular work today. I am taking the day off.... To relieve stress I stripped, primed and painted some small parts on my 15.0JC.

Highlighted in the attached pictures is my intake manifold and carb air filter horn thingie or what ever it's called (Onan parts manual is in the workshop) in various stages of the paint job.

I also did the same to many small parts and some brackets (sorry no pictures of the small things).

I am off now to a paint shop with my exhaust manifold. The shop owner specializes in powder coating and will blast and powder coat the exhaust manifold with high heat powder coating. I will try to take some pictures, but he sometimes goes off the very dEeP end when talking politics (I love to get this guy going on a rant talking politics). I think he belongs to a militia that wants to take control of this failing country.

JohnnyC
New Jersey
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  #835  
Old 08-29-2014, 03:42:07 PM
scoops scoops is offline
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Default Re: What have you done to your Onan generator today?

That thing is going to look freakin awesome when finally all put back together.

I just picket up a 4bfa for a good price, this things looks brand new.
I'm going to degrease the bottom and put up a picture, this is by far one of the cleanest bras I ever had.

---------- Post added at 03:42 PM ---------- Previous post was at 03:40 PM ----------

Lol.. Spell check, meant to say bfa'a not bras. Lol
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  #836  
Old 08-29-2014, 04:00:01 PM
JohnnyC JohnnyC is online now
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Default Re: What have you done to your Onan generator today?

Scoops, yes - post pics of your latest child, I mean Onan. As for my project, I hope it runs after all finished. In the meantime, I am having a lots of fun restoring my JC. It is a lot cheaper than cars AND takes less space.

--- Continuation from my last response..... I dropped off the exhaust manifold at the powder coating paint shop. We did no work to it, but instead talked for 1.5 hours. Let me say that if here was ever a militia uprising in New Jersey, it will most likely start right at the shop I visited. he owner swears the NSA is monitoring his steps. This guy is so far to the right, he hit the steering bump stop and then some. Picture below shows the manifold hung in his shop. Next week it will be blasted and powder coated to look better than new.

JohnnyC
New Jersey
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  #837  
Old 08-29-2014, 10:54:13 PM
len k len k is offline
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Default Re: What have you done to your Onan generator today?

After putting it off for ~ 3weeks I exercised my 7NHM today (it's basically a NHE). Wanted to put a load on it for the first time since I got it. Reg wasn't ready yet so I dragged out a 17.5 VDC power supply I made as a kid and put it series with start bat for ~ 30VDC to rotor. 36VDC would be better , but that was not convient. (High inductance rotor , so free wheeling diode across rotor to prevent fireworks when I removed rotor current.)

Got ~112VAC no load and ran it for 1/2 hour. Then added a hair drier on it ~ 1.5KW ( at 120V) voltage dropped to 102VAC. Added a second 1.3kw hairdrier (at 120V) voltage voltage dropped to 92VAC. Then added a 3-rd hair drier got ~ 80V ??, and ran it for another 1/2 hour. Engine sounded fine. Figure at the reduced votlage I had 2-3 KW on it

Killawat meter said hz were bouncing arround between 60.2 and 60.7 This occured both loaded and no-load, engine pitch seemed to be smooth and non-varying. This gen has the electronic gov. Interesting that killoawatt meter worked even on ~ 80VAC, can't put my fingers on the numbers, but I thought it's specs say voltage has to be close to 120VAC. (115 VAC nominal , 125 VAC max)

Last edited by len k; 08-30-2014 at 11:04:03 AM.
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  #838  
Old 08-30-2014, 12:08:02 PM
Wayne 440 Wayne 440 is online now
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Default Re: What have you done to your Onan generator today?

RDJC, cleaned some bug residue out of the generator cooling outlet. While there, reduced the charging current a bit. Trying a new residual type bug killer in the housing. Checked oil and coolant levels. Thinking about putting a buzzer in the glow plug circuit for a warning before it starts automatically.

Last edited by Wayne 440; 08-30-2014 at 12:21:16 PM.
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  #839  
Old 08-30-2014, 01:18:17 PM
scoops scoops is offline
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Default Re: What have you done to your Onan generator today?

finally got around to adding second new style fuel filter to the old 5cck.

also, picked up a new edition, another 4 fba , pictures attached. all i did so far was hose it off, didn't degrease it as I had none with me, was just going to use the car wash bug and tar remover, but nothing came out when i selected that option.

i notice that my 2 bfas are different in that one of them has the same style bottom end as my cck, and the other bfa has newer different style. wonder why they switched?
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  #840  
Old 08-30-2014, 11:52:08 PM
YellowLister YellowLister is online now
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Default Re: What have you done to your Onan generator today?

i made this cart for my dja.. bought the flat cart for 40 cut it as needed.. went to my buddys shop and used his left over metal and welder and welded it all up.. the top is removable.. of course I had to test run it on its new cart, and piss my neighbors off a little.. it was about 8 pm.. going to paint it tomorrow maybe.. and once I find the center lift point weld a big hook to the lift bar.. good times
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