One 1/4" diameter tube went from the oil pump elbow to the bottom of the oil filter bracket.
A 1/8" diameter tube went from the oil pump elbow up the rear of the engine and accross the head to an elbow fitting in the side of the head (early tractors), or to a tee fitting in the side of the head (later tractors). Feeds oil to the rocker arms.
Another 1/8" diameter tube went from the tee fitting on the side of the head forward along the head then down to the top of the governor pivot post(later tractors). Feeds oil to the governor.
The 1/8" diameter tubes are so hard to clean well, so I usually discard them and run new clean tube. That size is not all that expensve and easy to buy.
