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Ryobi RY40109 20" Mower Blade Replacement

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  1. Ryobi RY40109 20" Mower Blade Replacement, Blade: crwdns2935265:01crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement, Blade: crwdns2935265:01crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement, Blade: crwdns2935265:01crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Before working with the blade, remove the battery.

    • Firmly grasp the battery, depressing the battery release and slide the battery out.

  2. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Turn the mower upside down on a flat, stable surface.

  3. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:03crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
    • Preventing the blade from spinning is an important safety step!

    • Use an 8" to 10" block of 2x4 to prevent the blade from spinning counterclockwise.

    • You may have to experiment a bit to position it correctly.

  4. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Protect your hands by putting on your heavy-duty canvas gloves while working around the blade.

    • Using a 15 mm socket wrench, remove the blade nut by turning it counterclockwise.

  5. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:05crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:05crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:05crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Remove the nut spacer and blade insulator.

    • Remove the blade.

  6. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:06crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:06crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:06crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Identify the alignment shapes on the blade hub.

    • Install the new blade on the hub using the alignment posts.

  7. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:07crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:07crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:07crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
    • Replace the insulator, spacer, and nut.

  8. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:08crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Re-block the blade to keep it from spinning clockwise this time.

  9. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:09crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Set the torque wrench to between 350-400lbs.

  10. Ryobi RY40109 20" Mower Blade Replacement: crwdns2935265:010crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
    • Tighten the blade nut with the torque wrench by rotating the wrench clockwise.

    • You have completed the replacement! Time to mow the grass!

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Jim Keplinger

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CSU Sacramento, Team 1-8, Laflen Fall 2024 crwdns2935289:0CSU Sacramento, Team 1-8, Laflen Fall 2024crwdne2935289:0

CSUSAC-LAFLEN-F24S1G8

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