Insulated return Yes, Voltage 28, Amp 60, One Wire hookup (Self exciting) Yes, Radius 2 99.00, B+ 1/4" UNF, Regulator type IR, Belt Adjustment Bracket Hole 1 1/2" UNC, Puq 26, Info Shaft 22.20 mm diameter, Mounting Bracket Distance 101.00, Radius 99.00, Prod. info BN, Bracket Hole Size Rear 13.00, Pulley w/o, Bracket Hole Size 1 13.00, Servicing Caterpillar, Holder Arm Width 14.00, Belt Adjustment Bracket Hole Position 60, Total Length 268.00, Remarks Replacing: 30SI., B+ Position 10