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New Cub added to the family

cub cadet 123 tiller trailer hydro

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#16 48willys OFFLINE  

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Posted June 30, 2016 - 06:38 AM

The 123 has a compression release , I'm not really sure how it works but I think it holds a valve open a little until it hits 600rpm then it lets the valve work like normal. Doubt that's what is making it loose that much compression though, just be careful if you try to push the valve down as the valve may be held up some. 


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#17 Mark 149 J. OFFLINE  

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Posted June 30, 2016 - 11:06 PM

This is the color scheme that my daughter has picked out for her cub cadet 123. It's dark blue with white.
20160630_210111.jpg

Edited by Mark 149 J., June 30, 2016 - 11:07 PM.

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#18 Mark 149 J. OFFLINE  

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Posted July 01, 2016 - 02:40 AM

I figured out what the problem is with the 123's motor.  Take a look at the pictures and it's self-explanatory.

20160701_000354.jpg 20160701_000401.jpg 20160701_000416.jpg 20160701_000602.jpg 20160701_000711.jpg

Unless I'm confusing this motor with a jigsaw puzzle, I believe the PO ran it out of oil causing the connecting rod to seize and the rod to fragment.  I found no damage to the block. 

 

I also noticed that this engine doesn't have balance gears.  What year did they start putting the balance gears in the Kohlers?

 

 



#19 48willys OFFLINE  

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Posted July 01, 2016 - 01:19 PM

I know some came without the balance gears, and many people leave them out because they can fail and take the whole engine with it. Most say they can't really tell any difference with or without. I know my brothers 149 that he pulled it out of didn't seem to affect it at all. Going to try for a rebuild?


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#20 Mark 149 J. OFFLINE  

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Posted July 01, 2016 - 03:56 PM

I know some came without the balance gears, and many people leave them out because they can fail and take the whole engine with it. Most say they can't really tell any difference with or without. I know my brothers 149 that he pulled it out of didn't seem to affect it at all. Going to try for a rebuild?


Yes, I'm going to try and rebuild it. I've got another crank and connecting rod I can use. The piston and cylinder walls look like they're in good shape.

#21 Mark 149 J. OFFLINE  

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Posted July 07, 2016 - 01:47 PM

Took the crank out of the K301.  I going to take it to my machinist/friend and see if he can turn it down.  The connecting rod journel measures 1.498.  Max wear is 1.499.  Hopefully he can do that for me and save me some money.

20160707_111205.jpg 20160707_111156.jpg



#22 lrhredjb OFFLINE  

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Posted July 12, 2016 - 01:15 PM

I hope you got that tractor cheap. Did the PO let on why it wouldn't run or did he play dumb?


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#23 Mark 149 J. OFFLINE  

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Posted July 12, 2016 - 02:46 PM

I hope you got that tractor cheap. Did the PO let on why it wouldn't run or did he play dumb?

He said that he wasn't sure why the engine had no compression but did say that the motor would turn freely.  I had him check for any holes in the block before I made the trip and he said there wasn't a hole.  The engine block is in good shape.  I was bummed about the motor needing major work but in the end my daughter will have a great tractor once I get the engine repaired.







Also tagged with one or more of these keywords: cub, cadet, 123, tiller, trailer, hydro

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