This is a A-H168994 Pinion, 1st & 2nd Planet, Reverser Gearbox PN: H168994Main Description As Following : A-H168994 Pinion, 1st & 2nd Planet, Reverser Gearbox P.N: H168994 Dim A (1): 16/24 teethDim B (2): 3.15" DiaReplaces: H105912, AH106618 Replaces: AH106618 JOHN DEERE , H105912 JOHN DEERE , Crossed From: AMH168994 , , AV104445 VAPORMATIC , WN-H168994 , , WNH168994 , , 300-D168994 , , 300D168994 , Found in Section & Models : Headers/Platforms/Feeder House > Feeder House Parts, John Deere COMBINE: CTS, John Deere COMBINE: CTS II, John Deere COMBINE: 6620, John Deere COMBINE: 6620 (Side Hill SN 610731>), John Deere COMBINE: 6622 (SN 507051>), John Deere COMBINE: 7720 (SN 612194>), John Deere COMBINE: 7722 HILLSIDE, John Deere COMBINE: 8820 (SN 464351>), John Deere COMBINE: 9400, John Deere COMBINE: 9410, John Deere COMBINE: 9450 (SN <700100), John Deere COMBINE: 9500, John Deere COMBINE: 9500SH, John Deere COMBINE: 9501, John Deere COMBINE: 9510, John Deere COMBINE: 9510SH, John Deere COMBINE: 9550 (SN <700200), John Deere COMBINE: 9550SH, John Deere COMBINE: 9560SH, John Deere COMBINE: 9600 Associated Items : New Also A-JD-O-OMH111330, A-JD-O-OMH120048, A-JD-O-OMH111330, A-JD-O-OMH120048, A-JD-O-OMH111330, A-JD-O-OMH120048 And : Outside Diameter: 3.15" Replaces: H105912, AH106618 Teeth: 16/24