New radiator cap replaces JD #AA5757R For pressurized systems Fits Models 50 SN: 5016616 & up, 60 6030927 & up, 70 Gas SN: 7008450 & up and Diesel SN: 7017500 & up, 420, 430, 435, 520, 530, 620, 630, 720 (gas and diesel), 730 (gas and diesel), 820 2 cylinder, 830 2 cylinder, 840, 1010, and 8020
See my eBay store for other 2-cylinder parts