2871A166 Alternator for Perkins Engine Models 1004 1006 12V 65 AMP CW Rotation model-11850 it has 12 connecting bands

it has 12 connecting bands or ribs

One New Replacement Fits IH Fits FARMALL TA Torque Amplifier Quill that fits 706

Length: 29-3/4"

Baldwin PA2405

2871A166 Alternator for Perkins Engine Models 1004 1006 12V 65 AMP CW Rotation model-11850 it has 12 connecting bandsOne New Aftermarket Replacement Alternator for Perkins Engine Models 1004 and 1006 Series This aftermarket replacement alternator fits Perkins 1004 and 1006 series diesel engines and is a direct replacement for OEM part number 2871A166. The unit is a Fits Lucas style alternator operating at 12 volts, 65 amps, with clockwise (CW) rotation and an internal regulator external fan (IR EF) design. Compatible applications include agricultural equipment