How to Change Riding Lawn Mower Blades
- 1). Pull the riding lawn mower onto a hard surface.
- 2). Loosen the negative battery terminal, using a wrench, to remove the battery cables from the positive battery connector. Then disconnect the positive cable terminal. Disconnecting the power source is a safety precaution.
- 3). Place blocks of wood opposite each other to support the blade deck if your mower's deck does not have wheels. Some mowers have a deck lever. If so, pull the leaver to lower the deck.
- 4). Remove the pins from the front of the blade deck and from the rear of the blade deck, using pliers.
- 5). Push in on the belt wheel with a wrench to relieve the tension on the blade belt and remove the belt. Raise the belt deck, if your mower has a lever.
- 6). Pull the blade deck out from under the mower and turn it upside down to reveal the blade.
- 7). Wedge a piece of wood between the blade and the wall of the blade deck to keep it from spinning. Unbolt the blade, using a socket wrench.
- 8). Sweep any loose debris from the blade deck, using a hand broom. Scrape any caked-on gunk from inside the blade deck, using a putty knife.
- 9). Spray the bolt with all-purpose lubricant and bolt the new blade to the inside of the blade deck, using the socket wrench. The new blade goes in with the sharp edges facing down.
- 10
Slide the deck back under the mower. Reaffix the belt (replace the belt with a new belt if it is damaged or worn), push the deck pins back in place and reconnect the battery terminals, positive first.
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