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Garden Tractors Discussion Forum

Question about bearing inserts on Kohler K301

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dhermesc

06-08-2012 08:17:56




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I found a place that supplies automotive like bearing inserts for K series engines. Anyone ever use these? My "freshly overhauled" K301 had the crank journal .015 to .024 undersized and is not usable in its current condition.


http://gardentractorpullingtips.com/engine.htm

About 2/3s down.




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RN

06-11-2012 15:48:56




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 Re: Question about bearing inserts on Kohler K301 in reply to dhermesc, 06-08-2012 08:17:56  
Was a thread couple yaers back about using Allis G insert bearings on Kohler rods with under size ground juornals. Continental and AC part numbers were given



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greenday

06-09-2012 05:14:37




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 Re: Question about bearing inserts on Kohler K301 in reply to dhermesc, 06-08-2012 08:17:56  
I use one in my 126 pulling tractor for higher rpm but I dont see a need for one in regular applications. Like Steve in MO said you have to send the rod to a machine shop to have it altered to accept the insert bearing. DAve in MO



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dermesc

06-10-2012 11:24:10




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 Re: Question about bearing inserts on Kohler K301 in reply to greenday, 06-09-2012 05:14:37  
The cost of the replacement crank is the only reason I am considering this. When you can find one they are usually around $100 - $150+ on ebay and you are hoping they are standard or can be ground to .010 under and not as bad as the one you have. Coupled with the cost of a new rod I'm ahead spending $55 on the current rod (almost new .010 undersized put on the engine by the last owner without fixing the crank) and having the high quality inserts.

I take it you've had good experiences with their shop? They can't be putting out crap if their set ups are holding togather at 5000-6000 RPM.

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steve_in_mo

06-08-2012 12:37:31




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 Re: Question about bearing inserts on Kohler K301 in reply to dhermesc, 06-08-2012 08:17:56  
If you would read some more on that web page, you would find that the rod has to be machined to accept the insert bearings.



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dhermesc

06-08-2012 13:34:26




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 Re: Question about bearing inserts on Kohler K301 in reply to steve_in_mo, 06-08-2012 12:37:31  
I know that. Since you don't have to buy a new rod (they machine quite a bit off your old worn rod for the inserts) its comparable to what a new Kohler rod runs ($40).

I called them a few minutes ago - they want $25 to machine the rod and $25 for the inserts (to go .030 under).



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Tom Arnold

06-08-2012 19:08:45




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 Re: Question about bearing inserts on Kohler K301 in reply to dhermesc, 06-08-2012 13:34:26  
Are they going to Magnaflux your well-used rod to make sure there are no stress cracks in it......or do you just feel lucky? LOL



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