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I have a K341 that gave up a rod a while back. talk about "Big Bang Theory..." anyway, I tore it down to see how bad it got inside and to my surprise other than the rod, and the very bottom of the piston skirts the inside looks great!
the crankpin looked like it might have taken some abuse but i used a white stone (lightly) and some polishing paper and it must have been debris from the rod or piston because it came right off.
i took some measurements and it does show some wear. the crankpin measures 1.498 to 1.499 (low limit is 1.499) and out of round a full .001 (spec calls for .0005 max)
the bore measures .002 out of the wear limits and is out of round about .005. going to need a new piston anyway and i can bore it at work . no problem there.
my question is, would you re-use the crank in that condition? I can't grind a crank at work... lol
My 1978 C121 will not start. It will not crank over. The voltage at the battery post on the key switch is 12.3 volts. When I turn the key to the run position the voltage at the battery post on the key switch drops off.
I tested the clutch switch. good
Replaced the key switch.
Seat switch is bypassed.
I am suspecting the PTO interlock switch but I have no idea how it works and how to test it. I am very mechanically inclined but I have never seen a switch like that before.