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Onan Generators Restoring, operating and maintaining vintage Onan generators.

Onan Generators

Building a "Mount" for the Onan Power Plant


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  #1  
Old 09-01-2017, 09:00:24 PM
JoeE. JoeE. is offline
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Default Building a "Mount" for the Onan Power Plant

I got the machine all cleaned up. Going to start reassembling it soon.

I got to thinking after reading all these posts, I remember someone commenting that "if you're going to mount one of these, do it right and get it up off the ground a ways to ease maintenance".

I had been brainstorming of ways to do that without causing myself much work. I wanted it to be something neat looking and useful at the same time.

I didn't want to buy a bunch of raw material to build a square/rectangular tubing frame.. too tight for that.

I have lots of stuff laying around.. "never throw anything away"... that's my mantra.

I was outside my shop looking at something when I spotted this pretty hefty thing that had been laying there for probably 15 years. It was the remains of a big "spot welder" that another person had robbed the welder from.

I had also been thinking that I needed a fuel tank if I decide, or am only able, to run this off gasoline. I had 3 different reservoirs that would work for this... two held diesel, and one held hydraulic fluid... came off a big machine they scrapped at the place I worked. I saved them about 5 years ago.... they been setting all this time, covered with the filler caps on them... no rust.

Anyhow... I drug that spot welder frame in the shop. Drug the smallest of the 3 "fuel tanks" in there, too. The gods must be smiling on me, because the fuel tank dimensions were the exact inside dimensions of the spot welder frame.
I torched off about 5 inches of frame, torched out some stuff that was inside the frame to open it up... picked the tank up with the overhead hoist and it just slid down into the frame at a snug fit.
Then, I picked up the generator and let it down on a pair of boards just setting on top of the welder frame.

That's how it's going to look. Now, I can change the oil and work on it without kneeling down on the ground.
Best idea since sliced bread!
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  #2  
Old 09-01-2017, 09:45:01 PM
nothingbutdarts nothingbutdarts is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

That will be a real nice set up!!!!!
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Old 09-01-2017, 09:52:48 PM
Glenn Ayers Glenn Ayers is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Yep ... get em up off the ground ... so it's a pleasure to service / work on em !

.
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Old 09-01-2017, 10:48:38 PM
yellowlister yellowlister is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Your kubota is now a high boy.. I like it.. bending over, getting on the floor to get in those is a pita
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  #5  
Old 09-01-2017, 10:51:38 PM
len k len k is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

I "temporarily" put my 7NHM outside. Got about 12 cement blocks and stacked them ~3 high on all 4 corners. Then put one piece of solid 1 inch thick plywood over them and gen just sits on top , stays there by only gravity, has not moved an inch. All covered with a thick double tarp ( air mattress). Thinking of putting a 100 pound propane tank under it for a gasoline tank.

My JB is still covered up on a trailer. Nice working with it up on the trailer, much better than hurting your knees on the ground. Can stand or sit my butt on a milk crate while working on it.

Only issue with putting them up too high is center of gravity is high, have to make sure they don't tip over.
Also I like your idea of putting the gas tank under gen, saves wasted space.
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Old 09-02-2017, 06:28:50 AM
Gunny Gunny is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Looks good to me.
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Old 09-02-2017, 08:05:46 AM
JohnnyC JohnnyC is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Quote:
Originally Posted by Glenn Ayers View Post
Yep ... get em up off the ground ... so it's a pleasure to service / work on em !

.
.... I thought I was the only one that had a high-boy.... Seriously, it is a pleasure to get them off the ground to service and paint. Below are 2 pictures of my high-boy used during the restoration of my 4.0BFA.


JohnnyC
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Old 09-02-2017, 12:44:56 PM
len k len k is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Highboy..... Good access for painting.

But for running: center of gravity looks high, tipsy ( ratio of: height to base width is high). If use gen on highboy, I'ld recommend adding weight to bottom, ( heavy bats, fuel ), to lower center of gravity to make it less likely to tip over when a wheel snags during moving.
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Old 09-02-2017, 03:11:13 PM
Vanman Vanman is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

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to lower center of gravity to make it less likely to tip over when a wheel snags during moving.
Or in case it encounters a short circuit while running at speed....
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Old 09-02-2017, 03:57:49 PM
Handyhiker1 Handyhiker1 is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Quote:
Originally Posted by JohnnyC View Post
.... I thought I was the only one that had a high-boy.... Seriously, it is a pleasure to get them off the ground to service and paint. Below are 2 pictures of my high-boy used during the restoration of my 4.0BFA.


JohnnyC
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That looks like it would be a lot easier to work on then the way I am doing mine. Mine is only off the floor about 20"
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  #11  
Old 09-02-2017, 04:01:21 PM
len k len k is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Think my trailer is ~ 20 inch off the ground, seems ok.
Rain spray zone is ~ 2.5 ft off ground, but not too much up at 20 inch.
I figure on adding some plywood sides and roof it it's raining or snowing.

Get it too high and it neighbors may call it an eyesore.
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Old 09-02-2017, 05:33:45 PM
JohnnyC JohnnyC is offline
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Default Re: Building a "mount" for the Onan Power Plant

Mount them high and the mice can't get to the generators

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New Jersey
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Old 09-02-2017, 09:41:15 PM
AngrySailor AngrySailor is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Vanman, somewhere I have pictures of what's left of a crankshaft and alternator coupler from I think an 800kw MAK generator which was not synchronized while paralleling with another. Crankshaft was broken and the coupler was destroyed. I am told that both breakers tripped instantly (4800 Amp for instantaneous trip) and the smoke was let out also...
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Old 09-02-2017, 10:25:19 PM
DN29626 DN29626 is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Quote:
Originally Posted by JohnnyC View Post
...it is a pleasure to get them off the ground to...paint...
What paint do you use?
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Old 09-02-2017, 11:35:24 PM
JohnnyC JohnnyC is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

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What paint do you use?

Full details on the paint are right here ---> https://www.smokstak.com/forum/showthread.php?t=154239


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Old 09-03-2017, 11:37:47 AM
geezer88 geezer88 is offline
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Default Re: Building a "mount" for the Onan Power Plant

I've heard of putting someone on a pedestal before, but never an Onan.

The good thing about this idol is that you won't have to kneel before it.

tom
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Old 09-03-2017, 01:59:02 PM
Vanman Vanman is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

Quote:
Originally Posted by AngrySailor View Post
Vanman, somewhere I have pictures of what's left of a crankshaft and alternator coupler from I think an 800kw MAK generator which was not synchronized while paralleling with another. Crankshaft was broken and the coupler was destroyed. I am told that both breakers tripped instantly (4800 Amp for instantaneous trip) and the smoke was let out also...
I once *heard* a story involving a nuclear submarine in for service, paralleling to a large generator set on shore, so that the ship's plant could be shut down. Story goes that the phase rotation was backwards at the time that the switch was closed, causing the huge generator set on shore to roll away, while simultaneously causing the huge cables laying on the ground to disappear!

Is it a true story? I don't know. I'd love to find some photographic evidence.
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Old 09-03-2017, 02:18:35 PM
len k len k is offline
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Default Re: Building a "mount" for the power plant~ Onan JB

All that spinning momentum of rotor would not just go away when it's genhead acted like a brake. It would try to roll the gen frame, if not well bolted down.

Find it hard to believe anything involving nuclear power generation would not be better checked before throwing the switch. The sub's generator could be damaged, and that could threaten a meltdown. Typically civilian reactor spent fuel needs to be cooled for 5 years, residual decay heat, see Fukushima blow up. Guessing navy reactors have same issues.

But I'm guessing especially since it's nuclear related they would have included fuses with the proper 2X voltage rating to prevent any damage.
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Old 10-04-2017, 01:01:34 PM
JoeE. JoeE. is offline
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Default Re: Building a "mount" for the Onan Power Plant

I constructed an exhaust system for this JB machine. It's all stainless steel except for the muffler.
I use stainless tubing that come from a milking parlor on a farm... Inch-and-a-half ID.
I need to construct a bracket reaching from the generator itself to steady the pipe. I know you don't want the pipe to be rigidly attached so it doesn't put any stress on the connection at the manifold...
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Old 10-04-2017, 01:46:06 PM
Leon N. Leon N. is offline
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Default Re: Building a "mount" for the Onan Power Plant

I understand the reasoning, believe me, for mounting your standby generator up off the floor but, I do not think you will ever find a professionally installed generator mounted that-a-way.

After all, if well maintained, there should be very little if ant need to tear into it. In my experience over some 47 years, I would think there is little reason to have to do much of anything except change the oil and service the filters and "maybe" change the points and plugs and a biggie, clean the KN vent port.

In my case, I screwed up because I did not think to perform an initial refurbishment of the Prestolite starter and mice proof the machine. But hopefully I am all set from here on out.
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