Home » Public Forums » GMCnet » Onan rear bearing
| Onan rear bearing [message #340060] |
Thu, 10 January 2019 19:50  |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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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. Searching forum archives I found someone asked for this part number as well, but didn't find any reply. Also found a picture of it for reference.
http://www.gmcmhphotos.com/photos/onan-pictures/p16879.html
Part numbers and any tips, instructions or whatever are appreciated. As well as what else I should check over before re-install. It has been de-carboned and the pertronix ignition put on.
Thanks
Tyler
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: [GMCnet] Onan rear bearing [message #340061 is a reply to message #340060] |
Thu, 10 January 2019 20:14  |
Jim Miller
Messages: 501
Registered: March 2008
Karma: 10
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Senior Member |
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> 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
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Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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| Re: Onan rear bearing [message #340134 is a reply to message #340060] |
Wed, 16 January 2019 21:12 |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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Thanks Jim on the part suggestions
Here is a pic of the bad bearing...no cover, and not even the race!
http://www.gmcmhphotos.com/photos/data/6734/medium/onan_bearing_bad.jpg
I have the Onan I am taking out loose from the mounts, but the wires are not as straightforward as I hoped to unhook. Try again in the light tomorrow. Seems like bolted to coach, and bolted to genny.
And...to remove the "bell" to get to this bearing, is it just a cover, or will I be messing with the electrical stuff to get access? I read the manual on a full service, but I've never been into one of these before. Any tips or simplified "look for this" suggestions?
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
[Updated on: Wed, 16 January 2019 21:13] Report message to a moderator |
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| Re: Onan rear bearing [message #340136 is a reply to message #340134] |
Thu, 17 January 2019 08:29 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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keep track of the little tab. it may go flying.
there are brushes to deal with, you may want to replace the brushes while in there. I think you end up taking the brushes out before you take that blue plate/end cover off. also take a good look at the field coil for corrosion and try to clean that up.
as far as removing, I used a socket, a piece of flat stock and 2-C-clamps. it was stuck, but when I put some pressure on it, and tapped with hammer it came loose/off. (blue plate).
however getting the bearing off the shaft is another problem. I don't have a puller that fits well, and I have not been successful in removing the bearing yet from the shaft. My field coil is bad, so I may end up parting out my onan, as I found a 2800 microlite that I am pretty sure i will end up using. So I may never take the bearing off of mine.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Onan rear bearing [message #340154 is a reply to message #340060] |
Fri, 18 January 2019 09:53 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Jim and I have talked. he has a good product, and I was seriously considering going that route. The RPM of the microlite bothers me, but not the wattage. 2800 watts will be plenty for my use. My changes in the coach has really reduced my power needs. new A/C unit, and no more electric waterheater. I won't be able to run both roof A/C's at the same time, but there is rarely an occasion that I ever want to, and probably do not really Need to.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Onan rear bearing [message #340179 is a reply to message #340060] |
Sat, 19 January 2019 07:37 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Several years back I went to the Cummins-Onan shop in S Atlanta to get some stuff and talk to the tech who serviced our big gensets. We walked into the shop and i noticed a stack of MicroLights in the corner in various stages of disassembly. His comment was, the 3600 sets break a lot. Friend has one under his dog - hauler van to run the A/C at show sites. It has been troublesome continually. I think I have one in my shop I took out of one of our promotions vans.
Unless they have greatly increased the reliability of these toys, I'd pass in favor of Freight, Harbor. In your case, I'd heal the 6KW and go about my binniss. YMMV.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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