Racing RAC4000T-A3 Original Instructions Manual page 19

Tilt the mower to the right, so the air cleaner side is up. This will help to prevent fuel
leakage and hard starting.
Inspect the blade for damage, cracks and excessive rust or corrosion.
A dull blade can be sharpened, but a blade that is excessively worn, bent, cracked, or
otherwise damaged must be replaced.
Check that the blade bolts are tight.
Removal and installation
Wear heavy gloves to protect your hands.
Remove the bolt with a socket wrench. Use a wooden block to prevent the blade from
turning when removing the bolt. Then remove the blade.
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