This is a A-R45134 Gear, Oil Pump Drive PN: R45134Main Description As Following : A-R45134 Gear, Oil Pump Drive P.N: R45134 Late style press fit without keywayTeeth: 20 Crossed From: AMR45134 , , AV104953 VAPORMATIC , WN-NR-45134 , , WNNR45134 , Found in Section & Models : Engine Parts > Engine Oil Pump and Related, John Deere BACKHOE: 500A, John Deere BACKHOE: 500B, John Deere COMBINE: 6600 (SN <335845 w/ 6.404D 6Cyl Eng), John Deere COMBINE: 7700 (SN <335845 w/ 6.404D 6Cyl Eng), John Deere ENGINE: 6404 (SN <214999, 6.404D EARLY POWER BOOSTER, 6CYL ENG), John Deere INDUSTRIAL/CONSTRUCTION: 500 (SN <280000 Early Power Booster w/ 4.270, John Deere INDUSTRIAL/CONSTRUCTION: 500C (SN 280000>, 4.270 4CYL ENG), John Deere INDUSTRIAL/CONSTRUCTION: 510 (SN 280000>, 4.270 4CYL ENG), John Deere INDUSTRIAL/CONSTRUCTION: 600 (SN <335845 w/ 6.404D 6Cyl Eng), John Deere TRACTOR: 3010 (SN <280000 4.270 4Cyl Eng & Early Power Booster Eng), John Deere TRACTOR: 3020 (w/ 4.270 4Cyl Eng & Early Power Booster Eng), John Deere TRACTOR: 4000 (SN <335845 6.404D 6Cyl Eng), John Deere TRACTOR: 4010 (SN <214999, 6.404D 6CYL ENG), John Deere TRACTOR: 4020 (SN <335845 6.404D 6Cyl Eng), Engine Parts > 4.270 Diesel, 400 Series, John Deere BACKHOE: 500A, John Deere BACKHOE: 500B, John Deere INDUSTRIAL/CONSTRUCTION: 500 (SN <280000 Early Power Booster w/ 4.270, 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: 3010 (SN <280000 4.270 4Cyl Eng & Early Power Booster Eng) Associated Items : New Also A-FRM-JD, A-JD-O-OMR32385, A-JD-P-PC736, A-JD-S-SM2038, A-SMJD203, A-FRM-JD, A-JD-O-OMR34406, A-JD-O-OMR41753, A-JD-O-OMR46012, A-JD-O-OMR48271, A-JD-P-PC1115, A-JD-P-PC858, A-JD-S-SM2038, A-JD-S-TM1005, A-SMJD203, A-JD-O-OMR46934, A-JD-O-OMR48273, A-JD-P-PC1116, A-JD-S-TM1006, A-SMJD203 And : Late style press fit without keyway Teeth: 20