Brother Feeder Cam Lever LY2579001 is a replacement printer component used in the frame and drive unit. It is identified in Brother parts documentation as a feeder cam lever, a part of the printer’s paper-feeding mechanism.
The parts manual lists it for HL-2130, HL-2132, HL-2135W, HL-2220, HL-2230, HL-2240, HL-2240D, HL-2242D, HL-2250DN, HL-2270DW and HL-2275DW models. A distributor also lists the DCP-7060D, DCP-7065DN, HL-2280DW, MFC-7360N, MFC-7460DN and MFC-7860DW. These references help identify the supported printer families for this specific part number.