Auxilliary Hydraulics

2.Governor?? I was recently mowing thick and thin grass in a pasture. In the begining when I hit a patch of thick grass the tractor would begin to bog down but would automatically apply more power and pull through it then when we got to thin grass it would speed up but automatically slow enging down to preset speed. Correct to this point. After about 30 minuates of this Something changed. It would not self govern and would not go back to idle even when the throttle lever was reduced. I had to miss adjust the linkage so as to manually shut down the carb throttle. upon later inspection the bumper spring adjusting screw (on the timing gear cover) was found finger loose. I screwed it in till I felt it hit something and a little more and locked jam nut. Seems to govern some but not like before and idle is very sensitive. 3.Numerous small problems, broken tachometer , cracked exhaust manifold etc.