R1336R Fits John Deere Tractor Intake Valve 80 820 830One New Aftermarket Replacement Intake Valve Fits John Deere 2 Cylinder Tractors This aftermarket replacement intake valve is Fits John Deere 80, 820, and 830 two cylinder diesel tractors a legendary series of large two cylinder workhorses produced from 1955 through the early 1960s. The intake valve seats in the cylinder head and regulates the flow of the air fuel charge into the combustion chamber, making it a critical component for proper engine