I agree, but for anything smaller than 1" or so, I try to use the proper metric size. (More excuses to buy tools)
10mm= 3/8"
11mm = 7/16"
13mm = 1/2"
14mm = 9/16"
19mm = 3/4"
24mm = 15/16"
A lot of times using a metric size on a nut or bolt head that is in bad shape will keep it from rounding...
I got most of my blocks from when I worked at a JD dealership. The blocks were used to block the wheels on combines when they were shipped by rail. My smaller 4X4 and 6X6 sizes I made by cutting up longer pieces with a chain saw.
I think the wheel wrench came later, when the rack and pinion rear wheels came out on the 50, 60, 70 series on up to the present.
I wonder what special tools were required to work on those, if any, perhaps some were needed for the PowerTrol?
Use the pump that came with the parts washer until the fluid level gets too low, then either dip out the remainder or use a hand pump. Remove the drain plug when you want to clean out the remainder of the sludge.