Tractor Repair: adjusting engine valves on a 504 gas international tractor, crank shaft, international tractor

Question
How do you adjust the valves in a 504 gas international tractor       and how is the displacement on the valves? Is it intake then exhaust or what is the sequence? Thanks Roger

Answer
there are 3 different methods for doing this but the easiest to explain is on any piston when one valve is fully open adjust the other one keep turning the crank shaft by hand until you have them all done i do not have the clearances for this tractor it doesn't matter what one is done first