Started rebuilding an early K301 (122/3 era). It still has a metal governor gear. First thing the IH Service Manual says for reassembly is to inspect the governor stub shaft for wear and replace if necessary. The gear seemed a little loose on the shaft so I mic'd it and it measures 0.3724". However, nowhere can I find what the nominal diameter for the stub shaft is suppose to be nor a minimum diameter value for replacement.
If the nominal dia is 0.3750", then that would indicate it has 0.0026" wear which doesn't seem too bad but when you compare that with the wear limit for the balance gear stub shafts, which have a minimum dia of .4995" for replacement, they only allow 0.0005" for wear.
Does anyone have info on what the stub shaft nominal dimensions should be and/or any wear limit value?