Servicing Mower Blades

CAUTION: Rotating blades are dangerous. Before adjusting or servicing mower:

Disconnect spark plug wire(s) or battery negative (-) cable to prevent engine from starting accidentally.

Always wear gloves when handling mower blades or working near blades.

Removing Mower Blades

1. Park machine safely. (See Parking Safely in SAFETY section.)

2. Raise mower deck to gain access to mower blades. If necessary, remove mower deck.

3. Block mower blade with a piece of wood to prevent it from spinning.

4. 
   GXAL42597-UN-19MAR13

   Loosen and remove nut (A), washer (B), and blade (C).

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5. Inspect blades; sharpen, balance or replace blades as necessary.

Installing Mower Blades

1. Position mower blade (C) with the cutting edge towards the ground.

2. Align the splined center hole in the blade with the splined spindle shaft (D) and put the blade onto the mower spindle shaft.

3. Install washer, with cupped side towards blade, and install nut to secure blade onto splined spindle shaft.

4. Block mower blade with a piece of wood to prevent spinning and tighten nut:

   • 42 in. and 48 in. decks: Models with M12 nut, tighten to specification - use 18 mm socket.

     Item	Measurement	Specification
     42 in. and 48 in. Decks With M12 Nut Torque	Torque	75 N·m (55 lb-ft)

   • Models with 5/8 in. nut, tighten to specification- use 15/16 in. socket.

     Item	Measurement	Specification
     Models With 5/8 in. Nut Torque	Torque	88 N·m (65 lb-ft)