does the JD 3320 have a fuel pump or a fuel injection pump or both? I search on a fuel pump for a 3320 results in a approx $30 fuel pump and a search on a fuel injection pump results in a $650 pump??
1948 Allis UC Hi-Crop Cane 1941 Allis WC 1948 Allis G with loader, 1948 Allis G with dual disc 1948 Allis G 1948 Allis G 1949 Allis G 1954 Allis G 1959 Ferguson TO-35 1972 MF 135 1979 Power King 2418 1989 Ford 345C TLB
Really it has three 菟umps you have an electric fuel pump drawing from the tank and pushing fuel up to the filter assembly and beyond, them there is a mechanical pump bolted to the side of the injection pump, and then the injection pump itself. FYI, an injection pump is going to be more like $3,000-4000
Are you having trouble? I have a PDF of the technical manual for your tractor, if wanted shoot me your email