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#1
05-05-2011, 12:55 PM
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Crankshaft bearing questions
I am needing help finding an aftermarket (SKF,TIMKEN) bearing number for a K301 engine. The numbers I found on partstree are IH-ST436P or IH-ST436 and have been unable to interchange them. I have also read that the Kohler 8 ball bearing design is better than the 11 or 12 ball design due to less friction. Is this true? Is there any tips or trick to removing/installing the bearings without using a press?
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Nemesis 
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#2
05-11-2011, 06:14 PM
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Is there a number on the old bearings? On my k321 the bearings are a nachi 6308 open style bearing. I believe the 241, 301, 321, 341, all use the same bearing. check evil pay. I agree 80.00 each from kohler is a bit much
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#4
05-11-2011, 09:36 PM
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any force you apply to a bearing has to be applied to the inner race only- as the inner race is in contact with the crankshaft. Pulling off a used bearing with no intention of re using it, tap on outer race if you want. It will move, just slowly. Installing new bearings, I grease the shaft journal and use a piece of tube steel to tap the inner race only. You could tap lightly in a rotary motion to work it on, but that tends to get it cocked and locked .
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#5
05-12-2011, 08:10 AM
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Thanks Guys for the information!
 Now that I know it is a 6308 I can interchange here at work. NAPA # 6308J, which sells for 65 bucks.
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Nemesis
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#7
06-05-2013, 04:54 PM
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this thread is a little old but i am rebuilding a k341 that i broke the rod in lots of pieces, cause the oil ran low. i made steal plug that goes where the crank goes in the id with a large handle i can tap on. thay came out nice. when rolling them i felt some things that may have been contaminates on teh races or balls. i dont know what all got in there from teh grenade or sludgy oil. well im looking at bearings now too. mine was an SKF 6308/C3Q66. when i looked it up there was nothing on SKF's site with those numbers. there was about 6 different 6308 bearings on there though with different specs. Brian Miller has aftermarket ones on his site for $15 each from china. id rather not have a china bearing in there. so do i just look for a bearing that has just 6308?
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1979 1650, #1 tiller with one extension, 90 degree box mounted, 3 point. 1961 4 digit bringing back to life. I have the mower and 3 pint for it. The 1650 is the fastest mower in the neighborhood.
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#8
06-05-2013, 06:50 PM
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put these in http://www.mcssl.com/store/midwestsu...n-ball-bearing I wash the bearings out and unless I see rust, pitting, fretting or galling on the race or the ball I reuse them. I don't ever remember having to replace one unless it had rust on it from sitting. even then I just put good used ones in. The bearings in the link above are 12 ball instead of 11.
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#10
06-05-2013, 07:18 PM
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Quote:
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