This is a A-180142M1 Voltage Regulator PN: 180142M1Main Description As Following : A-180142M1 Voltage Regulator P.N: 180142M1 Dim A (1): 6 VoltDim B (2): External Stocked As: A-TR-104 , Crossed From: 180142M92 , Found in Section & Models : Ignition & Electrical Parts > Ignition & Related Parts, Massey Ferguson TRACTOR: TO20, Massey Ferguson TRACTOR: TO30, Massey Ferguson TRACTOR: TO35 Associated Items : New Also A-DA-O-101LDR, A-DA-P-101102, A-DA-S-101102, A-FO-S-SHER-TRAN, A-FO-SOP-SHER54A, A-MH-O-MFTO20, A-MH-O-TO20AND30IM, A-MH-P-TO20, A-MH-P-TO2030IM, A-MH-S-MFTE20, A-MH-S-MFTO20TU, A-SMFE2, A-DA-O-101LDR, A-DA-P-101102, A-DA-S-101102, A-FO-S-SHER-TRAN, A-FO-SOP-SHER54A, A-MH-O-MFTO30, A-MH-O-TO20AND30IM, A-MH-P-TO20 And : Dim A (1): 6 Volt Dim B (2): External