This is a A-1977959C1 Compressor, New, Sanden Style w/ Clutch (4478) PN: 1977959C1Main Description As Following : A-1977959C1 Compressor, New, Sanden Style w/ Clutch (4478) P.N: 1977959C1 Side of EngineFitting Description: Horiz. O-ring 1"x1"Pulley Diameter: 6"Pulley Grooves: 2AReplaces: 47109148, 1999755C3, 1999755C2, 1999755C1, 1-34-684-458, B509660, 700713317, 2025220010Series Number: SD510Volt: 12 Replaces: 1999755C2 CASE/INTERNATIONAL HAR. , A-1999755C3 CASE/INTERNATIONAL HAR. , 500-7000 AIR CONDITIONING , 500-7005 AIR CONDITIONING , 700712705 MISCELLANEOUS , A-700713317 MISCELLANEOUS , A-86993462 IH COMBINE , A-97204C1 CASE/INTERNATIONAL HAR. , Crossed From: B509660 MISCELLANEOUS , WN-1977959C1 , , 1-34-684-458 MISCELLANEOUS , 1106-7030 , , 111499 , , 1206-7004 , , 12067004 , , 1706-7001 , , 17067001 , , 1999755C1 CASE-IH , 20252-20010 KUBOTA , 2025220010 KUBOTA Found in Section & Models : Air Conditioning Parts > Compressor, (Miscellaneous) (UNDEFINED): SEVERAL, Case-IH COMBINE: 1620 (S/N JJC0032630>), Case-IH COMBINE: 1640 (S/N JJC0034705>), Case-IH COMBINE: 1660 (S/N JJC0038346>), Case-IH COMBINE: 1670 (HILLSIDE), Case-IH COMBINE: 1680 (S/N JJC0045689>), Case-IH COTTON PICKER: 1822 (S/N JJC0012691>), Case-IH COTTON PICKER: 1844 (S/N JJC0002462>), Case-IH COTTON PICKER: 2555 (S/N