Hi-Lift Blade, 17.5"

Hello Jesus, thank you for the great question. Before installing the blades, you need to remove the deck from the lawn mower. Use the following instructions to remove the deck: 1. Park the machine on a level surface and set the parking brake. Stop the engine, wait for all moving parts to stop, and remove the key. 2. Using a spring puller, remove the deck tension spring from the deck tension rod and spring anchor. 3. Remove the deck belt from the PTO clutch. 4. Remove the cotter pin and washer (one per side) from each side of the rear-deck weldment securing the rear of the deck to the deck lift hanger. 5. Remove the rear lift arms from the deck weldments. 6. Raise the deck lift handle to the transport position. 7. Remove the cotter pin and washer securing the front deck hanger to the deck weldment. Remove the rod from the deck. 8. Remove the wood blocks from under the deck. 9. Slide the deck away from the machine. Now, after removing the deck, flip the deck over. Remove the blade bolt, washer, and blade from the spindle shaft, then replace it with a new blade. We hope this information helps!