SIZESTDMODELS : Engine Parts > Valve Train Components John Deere INDUSTRIAL/CONSTRUCTION: 500A (SN 280000 > 4.270 4CYL ENG) John Deere INDUSTRIAL/CONSTRUCTION: 500B (SN 280000 > 4.270 4CYL ENG) John Deere INDUSTRIAL/CONSTRUCTION: 500C (SN 280000 > 4.270 4CYL ENG) John Deere INDUSTRIAL/CONSTRUCTION: 510 (SN 280000 > 4.270 4CYL ENG) John Deere TRACTOR: 3020 (SN 123000 > 4.270 4CYL ENG).. more.