How to replace RYOBI 80V Lithium Zero Turn Ride-On Mower blades on a paired blade cutting system

To replace RYOBI 80V Lithium Zero Turn Ride-On Mower blades on a paired blade cutting system: 

• The holes in the blades must be aligned with the corresponding shapes to ensure that the blades are the correct way up.
• Apply silver grease (anti-seize) to the shaft before tightening the nut.