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. (Also the 13.9 cm (5.5 in.) cutting height 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. 
   TCT011992-UN-18NOV14

   Remove screw (A), hardened washer (B), large concave blade washer (C), and blade (D).

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3. Install replacement blade:

   • Blade wing must face toward top of mower deck.

   • When installing the blade:

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

     · Make sure the concave side of the large washer faces towards the blade.

     Install hardened washer, blade, large concave blade washer, and cap screw.
   • Tighten blade bolts to specification.

     Blade	Torque	122 N·m (90 lb-ft)

   
   

4. Lower machine.

5. Adjust mower deck to a desirable cutting height.