24.5 V Twin Kawasaki in Z925A John Deere commercial duty Zero turn.
Long story short; I adjusting valve lash and wound up with a stripped locknut for the adjusting bolt. As I broke loose the first nut to adjust the first valve, I wondered how the last mechanic in this engine got the lock nut so tight without stripping it?
Went on and successfully adjusted 3 of the 4 valve rockers. The last of the 4 gave me a lot of trouble. Had to tighten and recheck clearance 1/2 dozen tries and the lock nut finally gave up.
I have worked as a mechanic, automobiles, in the past, but will admit that it's been a while and I am at east, rusty.
In thinking this over, after the fact, I am wondering if these nuts might be tighten to failure hardware? Also got to wondering if the failed nut might have been damaged before I put a wrench on it? Thinking that, if it had been over stressed, in the past, maybe that explained it giving me so much trouble getting the adjustment right?
Of coarse; I stepped in this pile after working hours so I haven't been able to call a dealer to check any of these questions or check on parts availability.
I realize that I may be looking for excuses for damaging my parts. I am not usually a "get a bigger hammer" mechanic, but this may be all my fault.
Thanks for your thoughts, John
Long story short; I adjusting valve lash and wound up with a stripped locknut for the adjusting bolt. As I broke loose the first nut to adjust the first valve, I wondered how the last mechanic in this engine got the lock nut so tight without stripping it?
Went on and successfully adjusted 3 of the 4 valve rockers. The last of the 4 gave me a lot of trouble. Had to tighten and recheck clearance 1/2 dozen tries and the lock nut finally gave up.
I have worked as a mechanic, automobiles, in the past, but will admit that it's been a while and I am at east, rusty.
In thinking this over, after the fact, I am wondering if these nuts might be tighten to failure hardware? Also got to wondering if the failed nut might have been damaged before I put a wrench on it? Thinking that, if it had been over stressed, in the past, maybe that explained it giving me so much trouble getting the adjustment right?
Of coarse; I stepped in this pile after working hours so I haven't been able to call a dealer to check any of these questions or check on parts availability.
I realize that I may be looking for excuses for damaging my parts. I am not usually a "get a bigger hammer" mechanic, but this may be all my fault.
Thanks for your thoughts, John