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Onan Bearing part number [message #340343] Fri, 25 January 2019 11:33 Go to next message
1275gtsport is currently offline  1275gtsport   Canada
Messages: 272
Registered: September 2009
Location: Rothesay NB
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Senior Member
Hey GMC netters. what a great rainy , snowy, freezing cold January it has been here in eastern Canada. today while running the Onan to power my fridge, freezer, internet and TV in the old stick and brick the Bearing on the end on the Generator had a noisy catastrophic failure. (the outer race and most of the cage fell on the ground.) it was so bad that it stalled the Onan engine as if the pistons had seized.
anyway would someone have a part number or the number that maybe stamped on the bearing itself. the temps are about to plummet back into the negative again tonight and I really don't want to pull it apart to find numbers then have to go back out to replace the part. would rather do it all at once.
also can this be replaced while the beast is in place.



Adam Raeburn
Rothesay, NB
1976 Austin Mini
1977 GMC Palm Beach
---------------------------------------------------
Once you replace everything that is attached to something else. It will all be fixed.
Re: Onan Bearing part number [message #340348 is a reply to message #340343] Fri, 25 January 2019 13:57 Go to previous messageGo to next message
RF_Burns is currently offline  RF_Burns   Canada
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Registered: June 2008
Location: S. Ontario, Canada
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Senior Member
Jim Miller had posted this just a couple of weeks ago. Turns out it is a common bearing obtainable by generic part number.

> On Jan 10, 2019, at 8:50 PM, Tyler wrote:
>
> I bought an Onan 6K to replace the one missing the board, starter, exhaust, etc. On the rear there is a visible bearing, the dust cover is gone and there only seems to be about half as many ball bearings in it as there should be. Onan ran fine, but seems I should address this while out.


The Onan 6kw NH Operator and Parts manual, page 39, shows the bearing is Onan part# 510-0047. I have in my notes that this is a 6205 and some google sleuthing of the Onan# seems to confirm it. Various -xx suffixes of 6205-xx will dictate the type of seals/shields in the bearing.

This particular part doesn't really have a lot to do in life other than to prevent radial displacement of the armature under increasing electrical load conditions.

--Jim
Jim Miller
1977 Eleganza
1977 Royale
Hamilton, OH




Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
Re: Onan Bearing part number [message #340375 is a reply to message #340343] Sat, 26 January 2019 08:05 Go to previous messageGo to next message
1275gtsport is currently offline  1275gtsport   Canada
Messages: 272
Registered: September 2009
Location: Rothesay NB
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Senior Member
Thank You Mr burns. I did a search on the forum before posting but did not see the post. Now to get the part and installed before the next round of storms heading our way.


Adam Raeburn
Rothesay, NB
1976 Austin Mini
1977 GMC Palm Beach
---------------------------------------------------
Once you replace everything that is attached to something else. It will all be fixed.
Re: Onan Bearing part number [message #340377 is a reply to message #340343] Sat, 26 January 2019 08:24 Go to previous message
Tilerpep is currently offline  Tilerpep   United States
Messages: 404
Registered: June 2013
Location: Raleigh, NC
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Senior Member
6205 is the short answer
I found it at advance as
S-205-ff for the $5 one and they had a national bearing same size that was $21.

Here is the thread last week.
http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&th=41872&start=0&rid=0

Update on mine if you read the above thread...
When I got it apart, my armature shaft had been worn down and no longer fit the bearing. Jim Miller recommended I shim it back up, which I have but have not tested yet.

From what I saw you have to pull the whole rear bell to get that bearing.


1975 Glenbrook, 1978 Royale rear bath Raleigh, NC
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