Last summer my engine quit and in taking off the head I found by turning the engine over by hand the piston would come up but not back down. I guessed the connecting rod was broke. Please keep in mind that I am not as mechanically inclined as I would like to be but not too long ago, with help from members on this site, I took apart and repaired things that I always thought were above my talents and had fun doing so. Now I want to fix this. I read through the service manual multiple times and read different forums on similar topics so now I am ready.?. I took the K341S off the Allis 416, popped the pan off the bottom and found that the piston actually split in half horizontally. The connecting rod and everything else seem fine. Both halves of the piston were still in the chamber and any fragment pieces fell into the pan, I could not see one scratch in the chamber. So I ordered a K341 rebuild kit with STD Piston, Rings and gaskets.
Now I am wondering if I should be replacing, or doing, anything else while I am in this deep.
This tractor was hard to turn over without a brand new battery or jumper cables. I read about the Automatic Compression Release and found that was not bringing the exhaust valve up like it should. I did bend the tab to where it works a little better. I will get a micrometer to be sure I have it adjusted enough.
I cleaned out the little carbon that is present, all and all not to bad from what I read.
I rechecked the gap in the valves since I am going to confirm the ACR is adjusted correctly.
Is there anything else I should be checking, adjusting or replacing?
What do you think caused the piston to break?