John Deere — Removing and Installing Mower Blades
Maintenance
From a John Deere owner's manual — check it applies to your exact model before use.
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Before you start
- Disconnect spark plug wires or battery negative (-) cable before adjusting or servicing mower
- Always wear gloves when handling mower blades or working near blades
Procedure
- Park machine safely.
- Raise mower deck to gain access to mower blades. If necessary, remove mower deck.
- Block mower blade with a piece of wood to prevent it from spinning.
- Loosen and remove nut, washer, and blade.
- Inspect blades; sharpen, balance, or replace blades as necessary.
- Position mower blade with the cutting edge towards the ground.
- Align the splined center hole in the blade with the splined spindle shaft and put the blade onto the mower spindle shaft.
- Install washer, with cupped side towards blade, and install nut to secure blade.
- Block mower blade and tighten 5/8 in blade nut using 15/16 in socket to specifications.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Mower Deck Blade Nut—Torque 88 N·m (65 lb·ft)
Source: John Deere owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.