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John Zabrocki (John_z)
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Username: John_z

Post Number: 12
Registered: 9-2006
Posted From: 64.61.224.18

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Posted on Sunday, November 12, 2006 - 12:58 pm:   

Drats. Had to come home a day early. Generator was working fine, had stopped to ask permission to spend night at a WalMart. When we got back in the bus, i could tell right away there was no heat. Generator motor was still running, but zero output. Circuit breakers all looked good, but reset anyway, and it did no good. I do not have a manual for my genset, so any suggestions on what to check would be appreciated. It is an older Onan 5.0, gas engine air-cooled model. TIA
Pete/RTS Daytona (Pete_rtsdaytona)
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Username: Pete_rtsdaytona

Post Number: 281
Registered: 1-2005
Posted From: 72.40.14.18

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Posted on Sunday, November 12, 2006 - 1:17 pm:   

Lots of older Onan's have a "brige rectifier" that goes bad - especially when you turn off the generator with the rooftop A/C still running.

Replace it with a generic bridge rectifier (BR) with a higher "PIV - Peak Inverse Voltage Rating" - original onan - approx 300 PIV

An after market BR w/1,000 volt (PIV) rating is available from many Electronics stores at less than $10. The PIV is greater than 3 times the OEM BR & should never fail (well almost never). NTE # 5328 is the after market BR that I use. (Duane Simmons) or higher capacity rectifier (KBPC3510) (35 amps 1000 PIV

Pete RTS/Daytona
John Zabrocki (John_z)
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Username: John_z

Post Number: 13
Registered: 9-2006
Posted From: 64.61.224.18

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Posted on Sunday, November 12, 2006 - 1:45 pm:   

Thanks Pete. Where do i find the br on the genset? What do i look for, and is there anyway to test it with a multi-meter to see if it is bad? I appreciate your help.
Pete/RTS Daytona (Pete_rtsdaytona)
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Username: Pete_rtsdaytona

Post Number: 282
Registered: 1-2005
Posted From: 72.40.14.18

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Posted on Sunday, November 12, 2006 - 5:03 pm:   

John

You can test them with a multi-meter

they have 4 terminals (+) (-) (ac) (ac)
see--> http://www.gmcmhphotos.com/gallery/showpic.php?uuid=tipsicobob&aid=444&pid=17103

use the meter to check resistance on each of the 4 sides - Side corner to side corner - not diagonilly(sp??) - each of the 4 sides should have a high resistance one way and a low resistance when you flip the meter leads

If any side does NOT have a high/low reading - it's bad

here's some pictures / discussion on BR replacements in a GMC Classic M/H

http://users.california.com/~eagle/generator.html
see---> Onan Bridge Rectifier Replacement--

http://www.gmcmhphotos.com/gallery/showalbum.php?uuid=mrerf&aid=346
Bob Wies (Ncbob)
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Username: Ncbob

Post Number: 199
Registered: 2-2006
Posted From: 68.238.115.13

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Posted on Sunday, November 12, 2006 - 6:59 pm:   

John, I don't wish to step on Pete's toes, but having been an Onan dealer for over 20 years let's get some information so we can discusss this problem intelligently.

There should be a plate on the generator that should give the Model and Spec #'s. I suspect that it's a 5.0CCK but that's only a guess. Get that information for me and I can lead you to the source of the problem...probably a resistor in the generator end.

So, if you'll do that...I can help you. My e-mail is in my profile.

Bob
John Zabrocki (John_z)
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Username: John_z

Post Number: 14
Registered: 9-2006
Posted From: 64.61.224.160

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Posted on Sunday, November 12, 2006 - 7:32 pm:   

Hi Bob, and thank you for your offer to help. You are correct, it is a model CCK-IR, 6000P. Don't know if the serial number contains any useful info, but it is 0472435659. I tried your profile but could not find an email address. Thanks again.
R.C.Bishop (Chuckllb)
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Username: Chuckllb

Post Number: 30
Registered: 7-2006
Posted From: 4.240.144.220

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Posted on Sunday, November 12, 2006 - 11:08 pm:   

Hey, Bob...( and thanx John for the question)...keep it going here if you would...many of us have those
"older" Onans. :-)

RCB
Bob Wies (Ncbob)
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Username: Ncbob

Post Number: 200
Registered: 2-2006
Posted From: 68.238.116.83

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Posted on Monday, November 13, 2006 - 2:53 pm:   

John, I will be more than happy to help out but at the moment my wife is in the Hospital with a heart problem.

As soon as I can get things sorted out here I will get back to you...and I will correct my profile.

Bob
Jack Conrad (Jackconrad)
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Username: Jackconrad

Post Number: 496
Registered: 12-2000
Posted From: 207.30.189.83

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Posted on Monday, November 13, 2006 - 7:01 pm:   

Bob,
Hope all is going well with Jackie. We will keep both of you in our prayers. Are ya'll still up north or in FL? Jack
John Zabrocki (John_z)
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Username: John_z

Post Number: 16
Registered: 9-2006
Posted From: 64.61.224.232

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Posted on Monday, November 13, 2006 - 7:12 pm:   

Bob, don't worry about my generator. I woke up to 4" of snow this morning, so i doubt it i will be out there laying in the snow working on it anytime soon. Take care of your wife, and hope all things go well! When things are settled down and you feel up to it, give me a shout. Thanks again.
Gene Lewis (Genelewis)
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Username: Genelewis

Post Number: 57
Registered: 12-2000
Posted From: 24.179.99.1

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Posted on Monday, November 13, 2006 - 10:07 pm:   

Sorry to hear that the wife is in tyhe hospital. Our prayers are with you. We will keep you on the prayer list - keep us posted.
Thanks for the road trip in the Scion while in Timmonsville. I believe its gonna be Scion.

gene
H3-40 (Ace)
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Username: Ace

Post Number: 344
Registered: 10-2004
Posted From: 75.200.96.212

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Posted on Monday, November 13, 2006 - 10:26 pm:   

Jack, Bob and Jackie are still up north. They were planning on coming down later this week but it looks like it will be a little longer!

Ace

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