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Go Back   Only Cub Cadets > Cub Cadets > Cub Cadet Engines > Onan Engines

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  #21  
Old 07-02-2014, 11:04 PM
J-Mech J-Mech is offline
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BTW, I have never, ever seen a set of calipers that were as accurate as a micrometer.

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  #22  
Old 07-04-2014, 07:49 AM
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john hall john hall is offline
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Another method of checking the bore that has not been mentioned is to get someone to turn a couple of go/no-go plugs. Basically you just turn a piece of steel to the high and low limits and see if they fit--one should the other should not. Now to do this they have to be RIGHT. You have to use a GOOD and accurately calibrated mic and get a good surface finish. Also add a nice radius lead in on the gage. I am very hesitant about using telescoping gages for this. We rarely use them at work because they are not very accurate--at least for my line of work (especially the Chinese ones). The second problem is they require a lot of experience to get a very close measurement. Being off .0003" is probably not a good idea here--this isn't a piston bore. If you have a machinist friend that could measure the block with a set of tri-mikes or an inside mic that would be great. Those also help show up taper.

My question is if the bore is slightly oversize, are there any type of sealants/locking compounds that can be used as opposed to machining? I know Loctite makes stuff other than thread locking. I'm not suggesting trying to take up .005" but .0005" maybe.
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  #23  
Old 07-09-2014, 06:19 PM
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Fitz14 Fitz14 is offline
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I got it all back together and it runs great. I put the wide bearings back in instead of the narrow replacement ones. They both went in very tight, so I think they will stay. Whoever put the replacement bearings in, could have driven that one in a little too far and it finally came out. At least that's a possibility. The one that came out is splash lubed and the gear end has an oil hole. I did put a thin coat of Loctite bearing mount 620 on both of them. It's supposed to withstand the heat. It may or may not help, but it can't hurt anything. Thanks for all the help. It's appreciated

Jim
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  #24  
Old 07-09-2014, 06:24 PM
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Sam Mac Sam Mac is offline
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Sounds like you have it sorted out, keep us posted on how it works out. Glad to hear it's back up and running.
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  #25  
Old 07-10-2014, 05:28 PM
Texas Blues Texas Blues is offline
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Congrats on getting it running! Does your onan have an oil pressure guage? If so what does it read? Thanks, TB
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  #26  
Old 07-10-2014, 09:34 PM
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No, it doesn't have one. I wish it did. I should be able to put one on it though. I have 2 other running Onans and they both have a light, not a gauge. One is a b43g and the other is p218g.
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  #27  
Old 07-11-2014, 09:58 AM
Texas Blues Texas Blues is offline
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Quote:
Originally Posted by Fitz14 View Post
No, it doesn't have one. I wish it did. I should be able to put one on it though. I have 2 other running Onans and they both have a light, not a gauge. One is a b43g and the other is p218g.
Yea, guages are nice. My Massey 1655 originally came with the b43 on it, but was repowered with a P220 a year or so before I bought it. It has a guage on it. It runs at about 20 to 30 psi depending on the temp. I had my motor out in the spring but did not pay attention to where the port was that had the pressure line coming out. Im pretty sure though, that it is near the oil filter. You would probably have to take some tin off to get to it, but you could add a guage. TB
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