RICHARD P - Granted there's a DOZEN, heck maybe even a HUNDRED reasons, but 50 yrs ago car engines lasted 50,000 miles, farm tractor engines lasted 3000 to 4000 hours. Now days with today's improved oils, better air & oil filtration car engines last 200,000+ miles, tractor engines run 12,000+ hours.
We ran a CCO for two years with the oil bath air cleaner before it was traded for the 70 with the dry pleated paper filter. Mowing two big farm yards every week the 70 required rebuilding about every three years. Seeing as that was 45 yrs ago it's tough to say how much longer the CCO would have run without a rebuild, but it only mowed both yards a couple times the last year it was run, not near the hours the 70 ran every year.
Both My FARMALL's have oil bath air filters, but when the Super H gets rebuilt it will have a dry type installed. Since the FARMALL's are semi-retired it's not as big a deal now but back when they were doing fieldwork regularly there were times when both tractors were stirring up so much dust I could barely see beyond the end of the hoods when I was going with the wind.
And here I go agreeing with KENDELL again, lawn mowing is the dirtiest operation I do with ANY of My CC's. And when I mulch and vacuum leaves in the fall it gets unbelievably dusty & dirty. I also agree with Kraig, Art's Plow Special is a really sharp tractor, looks like a 7 HP at first glance, then You notice the engine seems "Different", then You see the custom decals.
DOUGLAS S. - Yes, a couple 3/4" ID flat washers behind the wheel between the washer welded to the spindle removes all the play in the wheels.