Describe the specific part or component of this device you're working on. Ex: Battery
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Turn the mower off and turn it over to access the blade.
Position the correct size pipe wrench or socket wrench on the blade nut.
Unscrew the blade nut while firmly holding the blade shim.
Remove the blade fixing bolt and its washer. Place them close, they will be reused to fix the new blade.
Remove the worn blade from its holder.
Place the new blade on the support, matching the shape of the support pins with the cutouts on the blade.
Insert the fixing bolt with its washer and start to screw it by hand into the blade holder.
Using the shim and the pipe or socket wrench used for disassembly, tighten the blade fixing bolt.
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