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Go Back   Only Cub Cadets > Cub Cadets > Cub Cadet Engines > Kohler Engines
Reload this Page Crankshaft question on my 123
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  #1  
Old 02-12-2019, 02:32 PM
Bob J Bob J is offline
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Default Crankshaft question on my 123
I'm finally getting around to working on my 123 that was my dad's. I took the engine out and started disassembly and when I pulled the PTO and the pulley off, the keyway groove is pretty egged out. I will be taking the engine to a local machinist that I have dealt with for years to do the boring and fitting everything up. I talked to him yesterday about it and he said I should look for a new crank. I haven't been able to find a new one but I may have found a used one. My engine is a K301AS. Do any of you guys know if a crank from a 1250 with a K301AQS engine would be the same? If I did my research right, I think they are the same. I'm pretty sure the part number is KH-47-142-30. Thanks for any help and input.

Bob
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Old 02-12-2019, 02:52 PM
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ol'George ol'George is offline
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If the crank is good on the diameter where the clutch lives, just turn the crank *90 and mill in a new keyway, problem fixed.
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Old 02-12-2019, 03:17 PM
twoton twoton is offline
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Always good advice from ol'George!
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Old 02-14-2019, 06:10 PM
Bob J Bob J is offline
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Thanks for the advice. I have a new pulley on the way and when I get it, I will drop off the engine and go from there.
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Old 02-14-2019, 06:53 PM
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sawdustdad sawdustdad is offline
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Just milled a new keyway on my K241's crank. Though I went 180 deg.
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Old 02-14-2019, 07:52 PM
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Originally Posted by sawdustdad View Post
Just milled a new keyway on my K241's crank. Though I went 180 deg.
*90 works better but it is done now.
It will prolly work ok just remember if there is a next time.
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Old 02-14-2019, 09:14 PM
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sawdustdad sawdustdad is offline
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*90 works better but it is done now.
It will prolly work ok just remember if there is a next time.
Why 90? there is a set screw at 90 deg. I figured (perhaps incorrectly) that 180 would balance better?
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Old 02-15-2019, 12:00 AM
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Shaft strength is usually the reason, and the loading @ *180 can cause it to start to work if the fit is looser than desired.
At least that was what they taught us 60 years ago, and worked well in my experience.
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Old 02-15-2019, 09:14 AM
mickb72 mickb72 is offline
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Shaft strength is usually the reason, and the loading @ *180 can cause it to start to work if the fit is looser than desired.
At least that was what they taught us 60 years ago, and worked well in my experience.
Lots of love for 60 years experience.
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Old 02-15-2019, 08:15 PM
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sawdustdad sawdustdad is offline
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Shaft strength is usually the reason, and the loading @ *180 can cause it to start to work if the fit is looser than desired.
At least that was what they taught us 60 years ago, and worked well in my experience.
Interesting. Will have to do some research. Sounds like a plausible reason.
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