Checking and Replacing Mower Blades

Do not work near raised mower deck unless it is safely supported.

Mower blades are sharp. Wrap blades or wear gloves when servicing.

Before performing any service function, wait for all moving parts to stop turning.

Disconnect battery or remove spark plug wire before making repairs.

When replacing mower blades always use genuine John Deere Service Parts.

Only replace blades, never straighten or weld them.

Checking Mower Blades

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

2. Raise the mower deck to the transport position.

3. Raise front of machine with a safe lifting device. (See Lifting Machine in the SERVICE MISCELLANEOUS Section.)

4. Check mower blades:

   • Make sure that mower blades are sharp and free of any damage.
   • Inspect blades; sharpen/balance or replace as necessary.
   
   

Replacing Mower Blades

1. To prevent mower blades from spinning, use a wooden block.

2. 
   APY08947-UN-10AUG18

   Remove bolt(A), concave blade washer (B), and blade (C).

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3. Install replacement blade:

   • Blade wing must face toward top of mower deck.

   • When installing the blade:

     · Make sure that the blade is properly seated on the spindle.

     · There are small indicator marks on the bottom side of the concave washer to help identify the correct orientation.

     Install blade, concave blade washer, and bolt.
   • Make sure washer is oriented correctly.
   • Tighten blade bolts to specification.

     Blade	Torque	68 N·m (50 lb·ft)

   
   

4. Make sure deflector cup (D) is seated properly between mower spindle and blade.

5. Position mower blade (C) with cutting edge toward ground onto mower spindle.

6. Install concave washer (B), with cupped side toward blade, and install bolt (A) to secure blade onto spindle shaft.

7. Lower machine.

8. Adjust mower deck to a desirable cutting height.