Replaces the following spindle assembly used on Cub Cadet, Troy Bilt, White, Yard Man, MTD: 618-0427, 918-0427, 618-0427C, 918-0427C, 618-0324, 918-0324. Fits the following MTD, Cub Cadet & Troybilt Models: · RZT-42 17AA554G755 (2006), 17AA554G755 RZT-42 (2006) · 17AA5AAG700 RZT-42 (2008), RZT-42 17AA5AAG700 (2008) 17AA5AAG700 RZT-42 (2008), RZT-42 17AA5AAG700 (2008) · RZT-42 17AA554G755 (2006), 17AA554G755 RZT-42 (2006) · 17AA5AAG766 RZT 42 (2006) Has 3 point star shaft where blades mount (Designed to accept 6 point star blade) Includes spindle assembly, pulley, and pulley nut Does not include blade washer or blade nut Mounting holes are not tapped, bolts that were removed are self tapping, will tap the holes when installing Includes 4 mounting bolts To ensure this part goes with your machine you should always go by the model number and serial number, which is normally found under the seat of your riding mower or on the deck on a walk-behind. If you have a Hustler, the model and serial number decal is located on the frame directly below and to the left of the operator’s platform or on the left frame side rail.