Things You'll Need
The blades on a Poulan Pro riding lawnmower revolve around the mandrel housing. These blades rotate rapidly to cut grass; however, the metal will damage easily if it hits anything harder than grass, such as rocks or other hard surfaces. Damaged and dull blades will cut poorly and may not cut at all. They will also rotate unevenly around the mandrel housing, causing misalignment in other areas as well. Check the conditions of the blades regularly on your Poulan Pro riding lawnmower.
Position the Poulan Pro riding lawnmower onto a flat surface. Pull in the parking brake to engage the parking brake and prevent any accidental movement during blade replacement.
Raise the mowing deck to its highest level, pulling up on the adjustment lever and gaining access to the blades. Loosen the hex bolt in the center of the blade with the wrench.
Unscrew the hex bolt the rest of the way with your fingers. Slide off the hex bolt, locking washer and flat washer. Pull the old blade off the mandrel housing and set it aside.
Slide the newly sharpened blades into position on the housing post. Make sure the trailing edge of the blades are positioned upward, toward the mowing deck.
Fit the flat washer, locking washer and hex bolt to the housing. Tighten down the hex nut to 30 to 35 ft. lbs. of torque.
Always wear proper safety equipment when handling lawnmower blades.