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Open Roads Forum  >  Tech Issues

 > Onan Generator Fault Code 2- Low oil pressure

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Sam Spade

North Central Florida

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Posted: 11/12/19 12:22pm Link  |  Quote  |  Print  |  Notify Moderator

timjet wrote:

I changed the oil and filled to the top of the dip stick and that seemed to fix it for about 6 months


Gotta ask.....are you assuming that it is still "full" of oil, or did you actually check it ?

Is it parked on a hill ??


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maillemaker

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Posted: 11/12/19 01:01pm Link  |  Quote  |  Print  |  Notify Moderator

Quote:

While I understand that they might not all be the same......the ones I've seen it is impossible to overfill them to any significant degree. A couple of extra ounces certainly will NOT cause the doom and gloom that you described.


I think I was talking to someone at Onan who told me this advice, and I would have been calling about my Onan 4BGE generator.

But, I can't remember anymore for sure who told me this.

My problem in the end was a bad Hall Effect switch.

Steve


1990 Winnebago Warrior. "She may not look like much but she's got it where it counts!"



timjet

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Posted: 11/13/19 03:35am Link  |  Quote  |  Print  |  Notify Moderator

The original poster here; I went to the coach yesterday and started the generator, it started up normally. It ran normally and sounded normal for about 15 minutes until I shut it down.
I don't think I have an oil pressure issue, I think it is an electrical issue. I'm going to investigate the electrical control on the unit paying close attention to the connectors.


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Sam Spade

North Central Florida

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Posted: 11/13/19 07:28am Link  |  Quote  |  Print  |  Notify Moderator

Fuel pumps seem to be a "high failure" item.
It can fail after 1 minute, one hour or half a day.....or fail to start at all.

And if you share a gas tank, it must be above 1/4 full.

alaska dennis

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Posted: 11/13/19 01:02pm Link  |  Quote  |  Print  |  Notify Moderator

timjet wrote:

The original poster here; I went to the coach yesterday and started the generator, it started up normally. It ran normally and sounded normal for about 15 minutes until I shut it down.
I don't think I have an oil pressure issue, I think it is an electrical issue. I'm going to investigate the electrical control on the unit paying close attention to the connectors.


When is the last time the fuel filter was changed? Not much electrical on diesel. Check voltage on fuel shutoff on injection pump. The next time it shutoffs on you and voltage on electric fuel pump if you have that.

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