In Reply to: What size over run posted by David on September 17, 2019 at 10:51:54:
If you are going to run a manure spreader, brush hog, finish mower, or ay other implement that is driven by a PTO driveline you should invest in an ORC. You measure the PTO Splined Shaft with a 1"-2" mic or 6" dial or digital calipers. Measure the major diameter of the spline 180° apart. If you are good a scale will work. If using a plow, cultivator, or disc harrow for example one is not needed so you can simply use an adapter sleeve, about 1/4 the price of an ORC.
1-1/8 to 1-3/8 sleeve adapter: