You'll need to secure the blade from spinning and remove the hubcap. Here's how.
- Disconnect the battery pack.
- Tip the mower on its side, with the air filter side up.
- Use a block of wood to wedge the blade so it can't rotate.
- Remove the hubcap (part 8) using the appropriate tool. There are two.
- Remove the blade bolt and washer.
- Install the new blade (part 1, 2, 26, or 27 depending on the exact type). Make sure the cutting edge faces the ground.
- Reinstall the bolt and washer, and tighten securely while the blade is wedged.
- Replace the hubcap.
If the blade impact was severe, also check the trail shield (part 21) and bevel support (part 22) for damage. A bent blade can throw the deck out of balance.
Always disconnect the battery before any blade service. A spinning blade can cause serious injury.